Forum Discussion

TURNKEY's avatar
TURNKEY
Explorer
Mar 24, 2019

How to power a fan only when solar is charging.

I want to run an exhaust fan from my battery compartment to vent out hydrogen during charging cycles but I don't want it to run 24/7 as I do now. I tried powering a computer fan off my panels before t...
BFL13's avatar
BFL13
Explorer II
Mar 27, 2019
red31 wrote:
OP states "It does not discharge at night as I run a Trimetric meter and it shows no loss. "


If the power came from the battery it should show on the Trimetric as AH loss. It depends on the amount of amps if it will show. 500a shunt vs 100a shunt and all that.

The RV will show neg amps all night from the various "parasitic" or "standing" draws (pick your terminology so that guy doesn't jump in on that! :) ) so you would not notice a muffin fan's amongst all that.

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