Combining Dissimilar Battery ah?
I know there are a few people here with real-world experience with this, so I hope they chime in! QUESTION: With a small 12v AGM battery (33ah), I have the choice of paralleling a slightly larger ...
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greenrvgreen wrote:
I know there are a few people here with real-world experience with this, so I hope they chime in!
QUESTION: With a small 12v AGM battery (33ah), I have the choice of paralleling a slightly larger battery (35ah), a much larger battery (42 ah), or a somewhat smaller battery (28 ah). All are 12v. Is there any reason to prefer one combo over the other? The charger appears to be ~6a.
Thanks!
The different size AH capacities don't matter for paralleling otherwise similar batteries. They will discharge and recharge at the same SOCs staying even with each other.
Other differences matter when paralleling batteries such as condition (old vs new, eg) and type (AGM vs Wet eg)
6a isn't much of a charger. You want about 30% so your combo of about 60AH would like a 20a charger. Lower amp size chargers will work, but take extra long generator time and more fuel.
