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Old 08-24-2015, 07:19 AM   #1
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Inverter battery advice needed

I need some advice from someone experienced with battery/solar/inverter systems. My current 12V inverter shuts down after only a short time because of undervoltage, even when the batteries are freshly charged.

So what I want to do is get a 24V inverter. But even if I series 2 12V batteries, I may have the same problem, although it's less likely due to the lower input current producing less cable loss (I'm using all 0 gauge cabling)

The inverter I'm looking at will function from 22-32 V input. I have the idea to series a 6V deep cycle golf cart battery with 2 12V batteries to give me 30V in. But I don't know if the golf cart battery can handle the current which will be going thru it. I'm thinking about two 6V batteries in parallel, and then series that with the two 12V batteries. That way, each battery will have less thru current. Does this sound like a workable plan?

Any advice would be appreciated.
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Old 08-24-2015, 07:27 AM   #2
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DCF hasn't been around in a while so I sent him a PM just now. Hopefully he'll pop in and answer. This is his (one of many) bailiwick(s).
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Old 08-27-2015, 02:41 PM   #3
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I like nickel iron batteries and trace inverters.
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Old 08-27-2015, 04:54 PM   #4
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NiFe ( Nickel Iron ) batteries are good in that they are indestructible and do not need careful management but they are very poor at holding charge.

You can loose up to 50% of your saved electrons in leakage in a couple of days .........

Kinda ok for sunny climes for overnight use and daily recharging.
Unfortunately lead acid still seems to be the best option for genuine off grid storage options.
Serious off gridders will tell you its still cheaper to buy mains electricity than pay for the batteries so the reasons for being off grid are generally to do with availability of mains.

Not having to rely on the grid is a great ideal though.
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Old 08-27-2015, 04:58 PM   #5
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Originally Posted by PMBug View Post:
DCF hasn't been around in a while so I sent him a PM just now. Hopefully he'll pop in and answer. This is his (one of many) bailiwick(s).
Yeah be good to hear how Doug is doing.

Last time he popped in he had just given himself a serious dose of radiation as he had an unexpected breakthrough in his fusion work and was suddenly in the spotlight .
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Old 08-27-2015, 06:55 PM   #6
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What about the spiral wound lead acid batteries or the gel style batteries? Would they be any better for those kind of applications?

http://www.optimabatteries.com/en-us...FUoXHwodHT4AHA

http://www.optimabatteries.com/en-us/products/bluetop/

http://www.trojanbattery.com/products/deep-cycle-gel/
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