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 26, 2019
red31 wrote:
I wonder how a small load would affect the controller scanning for mppt.

When the controller is off (scanning)/PWM/sleep the panels operate at a matched resistance as the load vs Voc, likely just a few volts for a small load.

https://www.youtube.com/watch?v=JZQEJ33xblE


I have been thinking the load on the input wires would be like added line loss.

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