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How long does it take to charge a 230CCA car battery?

by SolarFreak
Tags: battery, solar
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SolarFreak
#1
Apr13-10, 03:57 PM
P: 2
I have a 230 CAA car battery, and 2 solar panels in a parallel circuit (one is 15V, 300mA, 4.5W, the other is 15V, 125mA, 1.8W). I know that these are under optimal conditions, so please assume that they are. How long would it take to charge my car battery with these solar panels?
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russ_watters
#2
Apr13-10, 05:36 PM
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P: 22,235
A standard car battery is about 40 amp-hours, so if you get about the right voltage from your panels, that's 40/(.3+.125) = 94 hours at peak power. You'll be lucky to get that 4 hours a day on average unless you aim the cells, so that's about 23 days.
SolarFreak
#3
Apr13-10, 06:57 PM
P: 2
How can I find out how many amp-hours a car battery has for sure?

russ_watters
#4
Apr13-10, 08:40 PM
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P: 22,235
How long does it take to charge a 230CCA car battery?

Find the model number and look it up online.


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