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Subscribe to comments with RSS. This is just what I needed to know to set up the battery bank in my RV. The batteries were gone and no schematic.
CampRicco I have two battery banks. I want to be able to plug portable bank into stationary bank for charging. Should I be concerned about the inrush current when connecting portable bank into stationary bank while battery charges are equalizing.
Can a resistor be added to cable to slow current while banks are equalizing. If so where in connection and what value would you recommend.
BatteryStuff Tech You do not want to mix and match battery types for charging. The two battery packs you have are of different capacity, so you are creating a situation where batteries are going to get overcharged.
I would recommend charging them separately. Jim K Good morning, I have 2 batteries connected together to make 24 volts for my trolling motor.
My question is can I use 1 battery for my outboard for a 12 volt starting and charging system without disconnecting the 2 batteries.
If this happens too often the battery could fail and bring down the whole pack. Daniel Mangiardi You guys are awesome!
Thanks for all the info. Tech and Jeremy Fear have thoroughly answered a lot of great questions. They should be promoted and given a raise. This kind of customer service earns business and demonstrates professional prowess.
Again, thanks for all of your help! One can learn a great deal perusing some of the questions and solutions in this thread.
BatteryStuff Tech Assuming they are 2 volt cells currently sitting at 1. It is the same method as you see above in the article… negative terminal of the first battery to the positive terminal of the second battery, and then continue with the negative terminal on the second battery to the positive terminal on the third battery, and so on till you complete the string….
Mike Could I set up another 4 12volts 20 ah battery in my 48v but make them parallel to my 4 existing batterys would that keep it at 48?
BatteryStuff Tech It is not recommended to mix and match battery of different type, age, or capacity. So even though you could do it, we would not recommend such action.
We only recommend connecting batteries that are all the same age, type, capacity, and put together to begin with. Jerry Hamilton I have 4 identical 8 volt batteries can I use all 4 in a 24 volt system?
I was thinking that I can put 2 batteries in parallel and put it in series with the other 2 and get 24 volts. Has any one tried this? BatteryStuff Tech The only way I can see using 8 volt batteries in series to equal a 24v system is tying 3 of them together in series, which will leave you with one battery you cannot use.
Batteries in series or parallel are only recommend to be the same type, so three 8V batteries are required for 24v system, and if you wanted a series parallel setup for higher capacity you could get another 3 to put in parallel.
Marcus Hi There, I have bought a 30 year old boat that has two banks of three 12v 75Ah batteries, two are connected in series and one in parallel.
The system is 24v so I understand that this is being achieved by the two in series. I realise that this is a very bad set up and I should have four batteries with two banks connected in series and then joined in parallel something I will be updating.
However I seem to have an extra problem, when left with the main breaker switch off the two connected in series slowly loose their charge.
Is this due to the bad setup or is it likely to be a drain somewhere? I would have thought that if any of them were to drain it would be the one in parallel.
Any advice would be greatly appreciated. BatteryStuff Tech If you main breaker is off I would either suspect there is a draw coming off the battery before the breaker, or the batteries might be naturally discharging faster because they are at the end of their life.
I first suggest disconnecting them from the system and see if they discharge on their own. If not, then I would suggest tracking down the parasite draw.
James Cook All of this makes my brain hurt. I have a RV with two 12v amp batteries, giving me only amp hours to run the RV.
How should I wire these batteries together? BatteryStuff Tech Assuming your RV house bank is a 12v system your new battery pack containing 12v batteries will be wired together in a parallel setup.
In regards to Solar make sure you get a solar charge controller that is designed for Lithium, and then your solar panels go to the batteries through the solar charge controller.
That is how most hook up their systems, but there are more complex system out there that can run the solar through an inverter chargers so solar power is primary over battery power.
Obliviously if your getting into an advance setup we recommend contacting the manufacturer of the equipment you are purchasing for proper installation recommendation.
Matt Can you please help solve this mystery fot us? Our cabin has one 24v A panel with mppt charger.
Thinking of adding a 3rd due to them draining quickly from the refrigerator turning on and off all day. Is a 3rd battery going to be ok on the system?
BatteryStuff Tech Simply adding more capacity might help you in bad weather days, but if your having issues and it is not during bad weather days you will most likely end up with the same results.
In general your solar system at minimum should be putting double your daily draw back to the batteries to make up for bad weather days.
Your controller will take care of the excess if they are already fully charged. In regards to adding another battery into an older bank… It is not advised.
The newer battery will fully charge at a faster rate than the other batteries. In the end it will most likely get overcharged as the system tries to fully charge the older batteries.
This will cause the new battery to fail over time, and could eventually bring down the whole battery pack. Scott I purchased a rare vehicle that requires 24V to the engine but the other electronics are 12V.
It has two identical rather new 12V batts in series and after sitting a few weeks went dead. I removed the leads to charge each batt separately with my 12V charger.
When first testing each one with a volt meter one had a normal polarity and 12V, the second batt had 10V and reversed polarity coming from the posts.
Is this because the second batt is failing, is it normal to have a reverse polarity memory on the batt with positive to the neg post?
Or if both batts are perfect should the second batts have normal polarity on the charge? Thank you in advance. BatteryStuff Tech The batteries that is at 10v most likely has a bad cell in it.
In regards to why the polarity has reversed it is often caused when the battery is fully discharged, and then charged back up in reverse.
Another words if you accidental hooked the positive to the negative, and the negative to the positive, you can end up reversing the polarity if the battery was completely discharged.
This will keep both batteries balanced, and your 24v battery pack maintained. Jason I am trying to run my camper off solar. I have calculated w per hour at max, 70A per hr at 5 hrs.
BatteryStuff Tech Jason I wish I had good news for you, but your watt draw well exceeds your harbor freight panel. As you can see your requiring watts an hour, but your panel only puts out 45 watts an hour.
In most cases when you have a draw of that size an RV would switch over to their generator to power such devices. Any good solar setup will at minimum put double the daily amp draw back to the battery pack, and most will store up a extra day at minimum of energy.
I would suggest reading our article Solar Systems the Right Way. Mike I am going on a family vacation with a bunch of family members.
I have four batteries that I wanted to connect together and use an inverter so that I have Outlets for people to charge their phones. How should I wire them up series or parallel or series parallel?
I wanted to hook them up to my car battery so that I can charge them at some point during the day. Which way would last the longest without causing harm to my batteries?
BatteryStuff Tech It depends on your system voltage and the voltage of the batteries. If you have 12 volt batteries, and your inverter is 12 volts, then you hook them up in parallel.
If you have four 6 volt batteries and your inverter is 12 volts then it is a series parallel hookup. As far as charging the batteries I would not suggest hooking them up to your car battery for charging, as you could damage your car battery by the alternator overcharging it.
The proper way to charge an additional battery pack off an alternator would be to use a Battery Isolator, such as our Quick Power Amp Battery Isolator Bi Olugbenga Hello Tech, I have a battery of 12v,amp that lasted for hrs with a 0.
Also if your are pulling very high amp loads the battery bank you have might not be sufficient for your load depending on the low voltage cutoff on your inverter.
Kudos are not enough. Thank you for this…. Your tech staff must have some wonderful discussions at break time. See the internet can be amazing at times.
I bow and salute experts that really are experts. When you go to replace your entire pack you can change capacity to fit your needs.
Owais Dear fellow, i have a simple query but a lot of confusion. I have two 12 v batteries and AH connected in series to a 24 V solar inverter.
M not happy with its charging and output. I thought that might be the different amperage is the problem, and after viewing this article my confusion increased.
So plz plz plz tell me what should i do, so tht i can save my valuable batteries and inverter. Pete I have a VA inverter, with one 12v amp battery.
I just bought four 12v amp battery. Cant I connect all 5 batteries to give a 12V amps??? BatteryStuff Tech It is never recommend to mix and match different battery chemistry, types, and size.
Dave Smith I want to power a freezer at a research station in a fairly remote part of India. The freezer draws 4. Grid power is intermittent and I plan to use a diesel generator for most of the off-grid power, but as the samples in the freezer cannot be allowed to defrost, I want to have a battery back-up system in case of fuel shortages, breakdowns, etc.
Does it make sense to use a bank of 12v batteries through a watt inverter to power the freezer? If I connect a charger to the grid and then to the batteries, would the charger have to be disconnected when the batteries were being used?
I could use a manual switch to go from the generator to the batteries. With some extra added for inefficiency, starting, etc.
BatteryStuff Tech We would require more information about your situation. Please contact Tech Support. Biron i have a 24v system am using two 12v batteries connected in series but i notice one of the batteries discharging faster than the other what is the cause of this problem and how will i amend it.
I wanna add 4 more batteries to the circuit of 12v each to increase amperage. All 8 batteries are the same. Question; will the increased amperage hurt any of the components in my truck, or is the extra amperage just being stored for easier engine starts and longer running components like fridge, microwave laptop,… without idling the engine?
BatteryStuff Tech As always you want to follow manufacturer suggestion. What issues will I face charging these batteries together when connected in parallel because of the different capacity ratings?
BatteryStuff Tech The smaller capacity battery can become overcharged, and could fail bringing down the whole pack. Chidi Hi, I have 1. I want to increase the output voltage of the batteries to 24v which is what is required as the input of the inverter and also triple the Amp-hours so that my power output will last longer.
I was thinking, can I connect two of the batteries in parallel thus doubling the amp-hour and keeping the voltage constant AND then connecting connecting them in parallel to the remaining two batteries which are connected in series.
The output that enters the inverter now comes from the terminals of the batteries that are connected in series. BatteryStuff Tech It would be a similar hookup to our example in the article: Batteries Joined in Series and Parallel.
The only difference is that you are using 12 volt batteries and the voltage would increase to 24 volts versus 12 volts as the example shows with the 6 volt batteries.
Nat Hoping this is a simple question. I was given a 12v, w inverter overkill for my needs but free is free and wish to install it properly.
I believed I had everything I needed but was concerned about the fact that the inverter is 12v while the battery bank is 24v.
I assumed it would be fine just to connect to one of the batteries but read above that doing so can reduce the longevity of the entire bank.
However another post mentioned a 24v to 12v step down converter. What do I need to look for to purchase the proper converter for my system?
BatteryStuff Tech It is never recommended to draw off a single battery in a pack as it can unbalance the pack. I would would recommend contacting our Tech Department for suggestions.
Michael Dawson I have 36, 2 volt batteries, wired to give me 12 volts for my home solar system. My 12 volt inverter just died and my new inverter is 24 volts.
What is the best way to wire my bank to give me 24 volts. BatteryStuff Tech It would basically be three strings of 12 batteries in a series parallel hookup.
We had a power outage today for about an hour, I was only running 2 low voltage lights for combined draw of about 25 watts for about 60 minutes 0. BatteryStuff Tech I figured roughly 4.
Either that or they are on their way out. Joseph I have a question. I have two 3. Can I use a 1A 5v usb charger to charge these batteries while they are in series?
BatteryStuff Tech Two of those batteries in series equals 7. Paul Croft I have 4 X ah 12v batteries if I connect them as 2 banks of 2 connected in parallel will I have ah and 12v.
BatteryStuff Tech If you connect them together without a switch to select between them then it is really one bank, and yes you would AH.
Dell Inherited 18 Kyocera 50 watt panels but they were wired for volt system. Rewired them for 12 volt system and have 8 new 6v golf cart batteries deep cycle from Sams.
Concern is Centech constant peak inverter from Harbor Tools states in directions NOT to use batteries in series. Is this just an overprecaution?
Need to power a 5th wheeler at night and air compressor for air tools during day and two deep freezers. BatteryStuff Tech I would recommend talking to the manufacturer in regards to your question about connecting the batteries in series.
Two banks of 4 6v batteries in series would give you a series parallel 24v system. In general the manufacturer will recommend a fuse to use based on the size of the inverter, so I would look for their recommendation.
We do sell inverter installation kits and depending on the one chosen it will come with a A or a A fuse based on the size of the inverter.
Ninh I have two 12V batteries in parallel. What do you have to do this task and when should I install the isolator? I ready about some automatic isolators solenoid type that I do not want to get involvaed with and is looking for something manual and simnple.
BatteryStuff Tech In general if you want accessories to run on a different battery then they have to be wired to that battery directly.
You question goes beyond our expertise here, I would suggest talking with a local mechanic for suggestions. The battery isolator we sell are designed to charge the hood battery, and then send any extra amperage to the backup battery.
Scott Hello… Love the site! I have 2 2volt deep cell golf cart batteries one Trojan, one Interstate I used in my previous rv. Can I connect my 2 6 volt and the 12 volt for an overall 12 volt output?
If so who is this accomplished? BatteryStuff Tech It is never recommend to mix and match different battery types.
When creating a bank you want to make sure the batteries are of the same age, chemistry, and type. When you mix and match batteries outside of this recommendation there is a risk of damaging a battery pack.
Aene i have 3, 12v batteries that have 7ah for each sealed lead acid battery. BatteryStuff Tech As long as your charging them as a pack with a total of 21AH then you would be fine using that charger.
I only want to use this for storage incase of a power failure. BatteryStuff Tech The charge controller is rated to handle the incoming amp load to charge the batteries.
When selecting one you just want to make sure that it exceeds the amp rating that is charging the batteries. JB Looking for proof of concept validation before I start cutting and crimping cables:.
System will consist of 3 banks of: To charge the system, I will attach a 48v, 25 amp charger to the central, end lead.
Charger and batteries are BMS controlled. Main concers, other than sinking to boat of course is; will this work? Where should I add the fuse s at the end of each bank AMP?
We would require more information about your situation. Please contact one of our techs at tech batterystuff. Xlr8 I have a sailboat and want to put in a amp battery bank for domestic use.
My diesel motor has a 65amp alternator. TECH We never recommend mixing and matching batteries that are different ages, type, or chemistry.
Mike Thanks for all the great info that is difficult to find elsewhere! I have a w inverter-powered cabin with two separate battery banks, and one bank appears to need charging more than the other.
One bank is 4 12v batteries, the other is 3 12v: Do you see a problem here? Can I run a generator the same as I would a regular 12v system? Looking at getting a new camp trailer but am not familiar with the battery config.
BatteryStuff Tech 2 6v batteries in series will provide you with 12 volt, which can be used in place of a single like sized 12v battery.
Giri Manzini Hello This article successfully answered my question about the parallel battery connection. Admin Please email your question, along with a schematic, to tech batterystuff.
Rabbe i need 2 pcs battery for my machine 12v 2. I have a floor machine with four 6 volt batteries wired in series to provide 24 volts.
I am attempting to change out 2 of the batteries. I have disconnected the interconnect cables from the old batteries, but I am now getting an arc when I attempt to make the final connection between the batteries.
The lead connector from the batteries to the motor is disconnected. Do I need to have the lead connected to avoid this situation or is there something else I can do to avoid arc when making the final connection maybe discharge the batteries, etc?
F-Alli I have been following up with this thread for a sometime , and i have been enjoying the questions and their corresponding answers.
Pls i have two questions-. Please show me how i can calculate the duration it would last if i have an average load of W.
Michael I have 6 12v amp batteries wired in series powering a 72 volt motor. I want to charge them all with watts of solar via 12 volt charge controller while leaving them wired in series.
My question is how can I safely do this if possible without having to untie the series connections and then rewire the bank in parallel to attach to the controller every time I want to recharge the 6 batteries.
Shannon I have two 24V lights and a 24V winch I would like to put on my pickup. If I take two 12V batteries hook them in series to power the 24V accessories.
Can I charge each battery with my 12V alternator if I wire them on there own circuit without doing any damage to my truck?
Jonathon I have an RV with volt batteries connected in series. The top of the battery says AH. How long will my batteries support this until they die?
Can I plug it into a 12V solar charger to charge it? I plan to drill the chassis of the UPS and connect solar controller and solar panel 12v directly to the battery, not moving the existing wires.
Is it safe to do something like that? The one that was added in aftermarket really got hot, smelled of sulfur and the other one was fine.
Do I have one bad battery or do I have an electrical problem? Both batteries are approx. BatteryStuff Tech While it is commonplace, it is not recommended to do so.
You will shorten the life of some or all of the batteries by doing so. We only recommend tying like size, type, and age batteries together in a system.
Is it okay to connect 2 of these in parallel to increase the current? I want to change to 4 12 volt Batteries? Is this possible and what are the down falls of doing so?
BatteryStuff Tech Ted, yes it is possible, but typically would not be recommended. If you are able to find 12 volt batteries to replace yours that are rated at a higher AH rating that then 6 volts, then it may make sense, but typically it does not.
Will it sufice to connect both the UPS and inverter separately to both the battries besides being in series. BatteryStuff Tech It is not recommended to do so.
I would recommend using a step down converter to ensure that the batteries are drawn down evenly. Snazzy Help me here. My outback system seems to be working fine but one bank of the batteries is always a lower sg so I assumed not as charged.
Admin Please email your question, along with the complete specs of your system to Tech batterystuff. BatteryStuff Tech As long as your system is sized appropriately.
That would still be 12 volts. Richard OK another parallel battery question. This all works fine. However if I remove the external battery and recharge the internal 12V 16Ah battery it now does not retain its charge.
Which would explain why removing the 55AH bat causes the system to stop working. We always recommend same type, size, age when using batteries in series or parallel.
For more specifics in regards to your application, please email us directly at tech batterystuff. I got a reading of Admin Steve, please email your question directly to tech batterystuff.
There are several different ways to test batteries, and they should be able to answer your question. Some ebikers are using recovered laptop batteries.
I like use try the Lipo packs used in remote controlled planes. The batteries come in many different shapes and sizes. How can put together a group to drive the motor at the recommended voltages and to get the best range?
Oh, and I almost forgot. So what would the charge specs be also. With all of our battery powered needs from cars to phones, DIY is liberating and fun.
For technical advice, please email the question to tech batterystuff. Andy Thanks chaps, this is a very interesting site.
I found it trying to get some idea of how to prolong the use of sets of used ,half dead golf cart batteries on a stand alone 24 V solar system.
This is only a non essential system I play around with having nothing better to do but it still runs my fridge as a bonus! Currently I have 3 strings 24 V connected in parallel.
Current draw is 12 Amps max about 18 hours every 24 hours. Some cells discharge more than others on days with no sun ,it automatically disconnects when the Voltage gets to Now the question I wish answered: Shashank Sharma i have one circuit for mobile charger and one dynamo circuit both of them having different jumper wires can i connect them two the same battery of 12v and 7ah using their jumper cables.
Sunil Vijaya i wonder whether you can help me a solar power set up. Helen Hi We have 24 batteries 2 volt each just wondering I what sort of charger we would need to charge Thanks.
Two 12volt deep cycle batteries wired in parallel its now sping but still cold. Are my Batteries now crap or can they still be charged and if so do they need to be charged separately or can they be charged together and how?
SORRY for so many questions but im worried about them. Any help would be greatly appreciated! What a good site.!! You solved my problems. However, I have two batteries wired in series with a blue seas system switch.
My question is, can I wire this charger to maintain both batteries or only one? Also, how should I wire it with the switch to get both if possible?
Kaye So if I need to charge my discharged battery, what would be the ideal way to connect them? In series or parallel? Does that sound right to you?
Thanks for all the info in this article, by the way. Found the cart very slow up hills, decent on flat surface and very fast downhill.
I have several questions, please: Someone told us we could replace 2 of the 6v batts with 2 8v batts. I did this, but accidentally crossed up the cables when putting in the new 8v batts i.
Then I ran the charger overnight. Did I hose the batts in any way by connecting improperly? I tested the cart the next morn and it was terribly slow, so I checked the cables and found my error.
Again, we have nothing — slower than slow on flat surface, wont climb hills at all and wont move in Reverse. Now they are saying it must have been a charging problem with mixed batt voltages and say we should replace all of the 6 6v batts with 5 8v batts and still use our 36v charger.
They said that by having 1 less batt and 4 more volts it would help the cart go faster up hills… Will this work? Is this worth the change?
What Im most worried about is: Will the 36v charger fully charge the 5 8v batts? Should we just stay with our 6 6v batts and be slow up the hills?
Im novice at this golf cart maintenance thing and want to help my son. Trapper i have 4 3. Gordon Thank you very much for being available to help those of us who are weekend techs with our toys.
My biggest question refers to trickle charging this set up. Since these are marine dual purpose batteries joined in parallel, I was wondering which Tender Junior charger I should use to keep them charged?
Thank you in advance for your expert advice, Gordon. Kenny Schwartz Ignore second comment. Kenny Schwartz I sent a question comment to you a couple minutes ago and believe I figured it out on my own just now.
That would essentially give me double the capacity without multiplying the voltage or amperage output from creating a bank while keeping them on the same charging system.
The system will also have a amp alternator for charging from the engine, and a DC distribution panel whose main breaker is amps. Gerard I have a 48v golf cart, consisting of 4 12v batteries.
I would like to hook up 12v accessories to it. Is there any problem with hooking the 12v accessories directly to 1 of the 4 batteries?
Is a voltage reducer necessary? Dwight Question, I have a bank of ah,48v 12v ah AGM -identical batteries why is it that I find that over a 3 day period one of the 4 batteries in series have less charge.
Jeremy Fear If one battery is draining faster than the others, when they are all in a series, then I woudl surmise that it is either older than the others, or it may have a cell that is not functioning correctly.
We always recommend using the same type, size, and age batteries when you ar tying them together in a system. That goes for both parallel and series connections.
Jonathan I am working on a backhoe with two 12volt batteries hooked in series to make 24volts. With engine idling one battery is charging at over What would cause this?
The battery that is charging at under 13volts is only Jeremy Fear It could be a variety of things, however, it sounds like either the batteries are mismatched, or one is failing and is pulling the other one down.
I have a stock of 12V and A batteries. So Which configuration series and parallel and effective voltage of batteries i need to properly charge batteries.
Jeremy Fear Series would be the correct configuration for the batteries, however without a controller it still will not work for you. The controller keeps the solar panel from inputting too high of a voltage directly into the batteries, which would hurt them.
I would not use these panels on those batteries without a controller. The unfortunate part is that we do not have a controller that will operate on 60 V.
Jose I have two separate Ah gel batteries in a boat. One is for supporting the single engine on-board, and the second one for all the other on-board services.
The installation comprises a single negative cable large cross section: The battery charger outputs A negative lead is connected to the large negative cross section cable.
My question is the following: Basically I can reformulate the question in the following manner: If so would a minor distance 40 cm be a big deal considering that a cross section of 50 mm2 can cope with more than A of current at 12V?
Jeremy Fear Yes, it is always a good idea to have the negative and possive wires the same guage. While it may work out just fine, we always recommend using the same size and type.
Diane Thank you for this great blog. We just purchased 4 more to add to them, exactly the same batteries. The originals are almost new, too just spreading out paychecks!
Question is, how do we wire them in to add more amps but not add voltage? Jeremy Fear You would have to have the same amount of batteries to add to the system in this case 8 and then you would wire them in series to each other, and then the entire bank in parallel with the other bank.
Mark I have 6 12 volt batteries wired in parallel, trying to create a jump cart for diesel rigs like Peterbilts. It will not jump start the trucks any ideas why and what I could do differently.
The trucks are 12 volt systems. Jeremy Fear I would first check to see if those trucks are 24 volt. A lot of the larger Diesels are 24 volt.
I am planning to enhance the battery capacity. Simple way is to buy two more 12 40AH batteries. I would like to know whether it would create any charging or capacity issues?
I have a 12V W panel array. Jeremy Fear Yes, there could be charging issues with that setup. The best way to do this would be to not have a single 12 volt 75 amp battery, but instead to have four 40amp, 12v batteries in a series parallel configuration.
Will this increase in the way the Ah capacity will? Jeremy Fear In a parallel circuit amperage is increased while voltage stays the same, so yes, amperage current will increase in parallel.
I have a W solar panel that is 36v and it outputs about 6amp. I could definitely use the energy so the batteries would never over charge.
Any pointers would be appreciated. Paul I am replacing battery packs in an emergency lighting unit. I am not sure if I should wire them in series, parallel or combination.
Jeremy Fear We recommend having a liscenced electrician instal the batteries. Eme Im working on an experiment for an art exhibition.
Where i need to power a small 1. Each lemon provides around 1volt and 0. To lower the amount of lemons that i would need to power the engine is there something to increase the amperage, a capacitor perhaps?
BatteryStuff Tech As amperage increases, the natural result will be a decline in voltage. BatteryStuff Tech The larger capacity battery will feed into the smaller capacity battery in an attempt to bring it up and equalize capacity.
Because it is impossible for the smaller battery to increase in capacity, you will see early failure on both batteries as one will be constantly draining and the other will be overcharged.
This happens automatically by simply connecting the batteries together. This unbalance can also happen when charging them together. David McNamara I have six deep cycle batteries, a 3, watt inverter in my horse trailer.
I have a watt refrigerator and 2 12 volt fans. How do I connect batteries to get the longest time out of them. I have two 15 watt solar panels.
BatteryStuff Tech What are the voltage of the batteries? And what is the input voltage rating on the inverter? Emerson Is this ok?
Plz get bck to me asap b4 itry tnx. Is this wise or would i get a better result just have each 12V bank with 5 batteries?
Shoumya Is there any way so that we can switch from one connection type to the other?? Like I will be connecting two 12V,6A batteries in parallel as power source for my robot..
Now if i want want to give a temporary boost.. BatteryStuff Tech If you have both a series connection and parallel at the same time, you will cause a short to occur.
You will need some pretty fancy wiring and switches to prevent both configurations from ever occurring simultaneously.
Good luck with that. Jeswills I have VA inverter with 12v and 1 amp then 2 amp deep circle batteries connected parallel. One is that the batteries were bit by the rain after i moved from my former apartment where a professional connected it for me.
Now i just want to connect it to my 12amp room socket, still parallel but i earlier put d charger clamp positive onto another battery and negative to another and it showed low battery at once after charging it for hours.
So now i put d clamp positive and negative to one battery in d bank. Do u think i might have done something wrong? BatteryStuff Tech Am I correct to assume you have three batteries connected in parallel?
One with AH, and two with AH each? Jordan Hey mate we are buying a bus and doing it up. Franky all this battery mumbo jumbo makes me want to go back to school.
We were thinking about having 6 deep cycle 12v batteries in the back of the bus to power a heap of equipment. I was wondering how we would go about bringing that to v and how would we charge all those batteries.
We thought that we might have something set up from the alternator but that many batteries to charge would take way too long. This plan will be happening towards the end of the year but we are just trying to figure out what we need and dont want to be screwed over by anyone.
The batteries can either be charged by 12 volt solar panels or an AC powered battery charger when the bus is parked.
So if I add a separate second bank with the same configuration , is there a way to have the inverter-charger service both banks, using a manual switch or preferably some kind of automatic load-balancer?
Trying to avoid replacing the large and not-too-old investment in the existing batteries if at all possible.
BatteryStuff Tech Inverters are designed to pull from a single source. If you do put a switch, it will have to be one bank or the other. Wasim Sohail I have load of Watts for 8 Hours.
What capacity batteries required for longest life, and how should I arrange them. BatteryStuff Tech Increased capacity will only give you longer runtime.
As long as the voltage the pressure is within safe range, then I see no danger in your proposed setup. Paul Z Happy Ground Hog day!
I live off the grid and have a 48V system consisting of 8 L16 AH batteries strung in series. One of the batteries died the other day.
Can I replace the one L16 with 2 cheapo 6V AH batteries in parallel, then connect them in series with the remaining 7?
But if they extend the life of the remaining 7, by a year or more, it will be well worth it. BatteryStuff Tech Replacing one battery will technically work, but like you said it will cause the rest of the batteries to forsake whatever natural lifespan they would have had.
All you are doing it postponing the inevitable. Someday you should replace all the batteries at the same time. Under such a series connection, the resultant voltage is measured by subtracting the lower voltage from the higher one.
And finally direction of current can be determined after we calculate the resulting voltage. Now, I wonder whether such a series connection is experienced in our real life, or such a series connection of sources can damage the device I mean negative terminal of one Battery is connected to negative of another battery OR the vice versa?
BatteryStuff Tech Series is a positive terminal connected to a negative terminal from another battery. But if the polarity is reversed on the second battery, therefore it would be the equivalent of connecting two positive terminals to each other.
Because it would be an incomplete battery bank, a system using batteries like this will experience problems. Tom C I have two 12 V batteries in my boat with a shorepower charger.
Recently both batteries were completely dead. I check shroepower and had V to the charger. Charger output was 6 V rather than 12 V.
Could this actually drain my 12 V batteries? BatteryStuff Tech Is the charger a 12 and 6 volt charger selectable with a switch? Bob I would like to know what it would take to run an average house in deep cycle batteries,inverter,and charging source.
BatteryStuff Tech Is amps the average draw about? For how long do you plan to run the house on batteries before needing to recharge them?
Is the amps taken from 12 volts DC? Or volts AC? Mick Very useful information. I have a question. Kelly how many car batteries do i need to run a house using KwH and what size of an invertor do i need?
BatteryStuff Tech Please do not use car batteries for a deep cycle application. KwH is a measure of energy, not power, so I need to know the time period associated with your number.
Either disconnect the batteries for charging, or buy another solar panel and wire it in series to create a 24 volt solar system.
Kev Wren hi, I intend to bank two batteries in my rv in parrelel to increase stored ampage.. Brian Could the overheating battery on the new Boeing Dreamliner be a simple case of incorrect wiring configuration.
But I cant help but feel it could be over looked. Just my 2 cents. BatteryStuff Tech Incorrect or inadequate wiring and connections can result in overheating and in some cases, melting of adapters and terminals.
Is it possible to take two banks that are connected in series, and connect them to each other in parallel? Where would you connect the leads in that case?
BatteryStuff Tech Yes, what you suggested can also work to accomplish the same output. These are the posts that you should connect in parallel.
Gpeg Thanks for the help. BatteryStuff Tech Every post that is used in a parallel connection for example all of the positives connected to each other will all act as a single positive terminal.
Therefore, you can technically use any one of them as the entry point. The same can be done for the negative side.
Gpeg Great, that makes it easier. Can I hook the charger leads in the same way? Gpeg Hi, thanks again for all of your information. Obviously performance would suffer, but would range be increased?
Your thoughts would be very helpful. The total amount of potential power is the same. The motor will run slower at 60 volts.
If the demand on the motor is constant, the lower available voltage will cause the motor to pull more amps in order to run properly.
Therefore, having more amp hours may not give you the impression of longer runtime if your pulling more amps at a time.
Gpeg Hi, thank you again for all of your helpful information. For instance, after my last run the battery pack tested at volts after sitting two hours.
What inaccuracies will I get with the two hour test? Is it going to be a false high, or a false low reading? Jeremy Fear I would be a false low, though 2 hours would be long enough to be accurate within half a volt.
Mark I have a light that runs off of a 12v car battery and draws 1 amp that I use for fishing. Could I hook two 6v lantern batteries in series to make a 12v system that would run the light?
And if so, any idea approximately how long I could run the light for? BatteryStuff Tech Two 6 volt batteries in series will work to power the light.
The length of time you can run the light depends entirely on the capacity amps rating of the 6v batteries. Sandy My wife and I are looking at building an off-grid house in the mountains solar, wind, and generator.