When you say 20% do you mean you only use 20% and want stop using the battery once it drops down to 80% charged ? Or you want to stop using the battery once it drops down to 20% charged ?
Newby needs help with choosing batteries
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a 12 volt 55 AH battery has a total capacity of 660 watt hours or .66 Kwh with a daily usage 130 watt hours per day.MSEE, PEComment
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I think I'm going to go with a 200 watt kit that comes with a 30amp charge controller with this set up instead of the 55 ah battery what size should I go battery should I go with ?Comment
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With a PWM then the charging amps will be the total of that 200 watt system can produce. Probably around 11 amps which would match up to a 100Ah battery.
If you are using a MPPT CC that could produce almost 17amps (200w / 12volt = 16.7a) which would allow you to go with a 150Ah battery.
Sunking answered your question. 20% DOD means there is 80% SOC left in the battery. SOC = State of Charge.Comment
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