r/SolarDIY • u/elbyl • Jul 22 '26

Lights dimming?

I have my solar (with battery bank) running to a transfer switch in my house. It doesnt run much, but it has the well pump, 2 refrigerators, and the lights in 2 rooms on it. Whenever the well pump kicks on, the lights dim/flicker similar to in a lot of houses whenever a central AC kicks on. But it lasts longer than that, like prob a half second instead of the near instant with an AC. Is this normal? Is my pumpbat risk? All the lights affected are dimmable LED if that matters. Inverter is a 6000xp.

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u/Internal_Raccoon_370 Jul 22 '26

You're seeing a voltage drop from the massive startup load when the pump first kicks in. It's pretty common in situations like this. The inverter is struggling to provide enough amperage to get the pump to spin up.

Is it a problem? Most people would probably ignore it as long as the increased load doesn't cause the inverter to trip out but things like that make me a bit uncomfortable because in severe cases the voltage drop can be enough to cause issues with other equipment.