12 volt vs 120 volt solar

For charging batteries you want lower amps.

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>100 watts at 12 volts is 83 amps

>>1134770
Batteries can only be charged up to a certain rate. If you go above it you'll destroy the battery.

>>1134783
Yeah I'm thinking I meant 8.3

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>>1134788
Yup. 8.3.

Depends on your needs and you always wanna go to much rather than not enough.

I'd stick with 12v and try not to even run anything 120.

Good luck sir

>>1134770

For DC, power in Watt is voltage in Volt times current in Ampere:

P(W) = U(V) x I(A)

So current is power divided by voltage:

I = P/U = 100 W / 12 V = 8.33... A

Higher voltage means you can deliver power to your invertor with less current. Current flowing through your wires results in power loss because there will be a voltage drop over the wires caused by its electric resistance (in ohm):

U(V) = I (A) x R(ohm)

Voltage drop is proportional to current and wire resistance so a string of panels with higher voltage result in lower power loss.