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Old 08-13-2015, 07:36 PM   #1
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Sizing house batteries.

I bought 2 AGM batteries that are 155 Amp Hour each. I am struggling trying to figure out how many I should have. How large is your battery bank and how are you using it? What do you have hooked up?
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Old 08-13-2015, 10:15 PM   #2
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Your two AGMs will give you 310 amps total but for best battery life you only want to drain them 50% (about 12.1 volts) so you have 155 amps to use before recharging. You get the fun job of figuring out what you want to run, for how long, how many amps you'll need to run that stuff and how often you'll need to, or be able to recharge.

A deep cycle battery will only tolerate maybe 150 deep cycles (down to 20% charge or about 11.5 volts) while the same battery only discharged to 50% may be good for many times that many cycles.

What do you plan on doing with your bus? If you're plug in campground camping, you can bring high drain appliances (microwave, coffee maker, hair dryer) and use the heck out of them. If boondocking you use much less or bring a generator.
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Old 08-29-2015, 12:48 PM   #3
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So I am up to 1200 Ah but I have a problem with 4 of the batteries. Those 4 will be exchanged for working batteries. I don't want to rely on having to hook up at a park.
Hopefully this will be a good start.
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Old 06-05-2016, 10:42 PM   #4
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I would love to hear more about what brands you folks are choosing or have experience with?
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Old 06-06-2016, 07:25 AM   #5
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Absorbent Glass Mat (AGM) Battery Information - Battery University
you can discharge agm's down to 20%. i have F L A batts with 840 amp hpurs of storage. i run my 10 cf fridge durring the day. it runs everything in my house and shop. i can go two days without sun. at 50% dod it takes about 3.7 kw to fully charge my bank. i have 800 watts of panels.
TriMetric Model Descriptions, Present and Past - Bogart Engineering love this thing, gota have one if you live off batteries. good luck. you got some great batteries
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Old 06-06-2016, 11:30 AM   #6
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Originally Posted by Plantresilience View Post
I would love to hear more about what brands you folks are choosing or have experience with?
Lots of people say Crown batteries are the best, https://www.crownbattery.com

They are not cheap but like most things in life you get what you pay for.
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