question

marcel-dijkman avatar image

Fluctuation ac voltage grid

Hi there. I have a installation where the grid impedance is very bad. With no loads on the grid (inverting) the grid-voltage is 243V when the loads come on and the inverter goes in pass thru the grid voltage goes below 220v. The problem is when the inverter switches between inverting/pass-thru the lights in the house are flickering (voltage drop?). Does anyone have a suggestion what setup I should use. Setup now is. 1phase 15amps grid connection. 2xMultiplus 2 5000 parallel, 250/100mppt, 16kWh lifepo4. ESS mode.

Multiplus-IIESSgrid
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1 Answer
Mike Dorsett avatar image
Mike Dorsett answered ·

Hi, I would start with reprogramming your Multi for a line voltage of 220V or 230V. This will cause less stress when switching. Also, disable UPS mode, and enable weak grid settings. or better still, change the ESS mode to ignore AC in, and operate primarily from the solar.

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