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Old 10-13-2022, 06:34 AM   #21
augiedoggy
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Default Re: Lithium install

Quote:
Originally Posted by Eco Battery View Post
The VOC and IMP are important for selecting the proper charge controller, but wont necessarily indicate how many amps your battery will get charged with. Itís all about watts. The math is watts/battery charging voltage 355/42=8.45A which gets you the theoretical max. Then for real world you have to reduce by ~20% for panel inefficiency and other losses. So on a clear day with sun directly overhead you may see 6.7A charging. This will further reduce based on sun angle and cloud cover. 3A-4A should be expected.

Donít get me wrong, I love the idea of a PV panel roof, and already have carts with them, I just donít want the expectations to be unreal.
I know what your saying and your right, I have solar on my pop up camper and my house so im no stranger to the variations in output. From my experience though they can just as often exceed whats on the sticker when new for the first year or 2 as well but there are so many variables with a cart thats always parked in a different position and angle to the sun
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Old 11-07-2022, 11:53 AM   #22
augiedoggy
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Default Re: Lithium install

just wanted to follow up that I have the panel mounted and I am in fact only seeing about 4-5amps of charging after boost conversion but I suspect it might be slightly better in the summer with a better angle to the sun. That will drop as I decided to change my plans and go with a diy48v lifepo setup which will cause the charging amps to drop once boosted to 52v or so.
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