Originally Posted by
larryrose11
mm123521,
in this application, the battery supplies all the power you would need,
The panned would continuously charge the battery.
Lets do the math
So, lets just say you have a 4S, 5000 mha Lippo to charge.
4s*3.7Vnom*5000mha/1000 = 74 Wh-hrs,
Lets just say your lipo boat charger is 90% efficent...
74 Wh-hrs / 0.9 = 82.2 Wh-hrs, DC input to your charger.
the Pirus battery in this configuration is 12S10P, or 20 modules from the link
12*1.2*6.5*10 = 936 Wh-hrs
So if you dont charge the Priys battery at all,
you will get:
936 Wh-hrs / 82.2 Wh-hrs, = 11.4 times you could be able to charge on the stored energy in the prius battery alone.
Now, lets add a solar pannel:
68W for 1 hr = 68 W-Hr, and lets just say you get 80% of the rated capacity:
68 Wh*.8 = 54.4 W-Hr will be added to the battery every hr it sits in the sun, roughly 3/4 of a charge on this hypo theoretical set up.
For the money, given that 11 modules are $20, + $12 shipping, the cheapest option is order 3 sets of them!
you would have a 12S15P pack!
12*1.2*6.5*15 = 1404 Wh-hrs stored.
1404 Wh-hrs / 82.2 Wh-hrs, = 17 times you could be able to charge on the stored energy in the prius battery alone. Then just jumper it to your car, and let it run for 10 min, turn off your car, and your done!!
$60 bucks, and $12 shipping, and you have a 14.4V, 97 Ah battery!!!
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