question

paulo-m avatar image
paulo-m asked

Multiplus II AC IN vs AC out ramp up speed

I have my ESS system on a simple grid parallel setup with all the loads on the AC IN of the Multi, with an ET112 as grid meter. When there is a change on the loads, the ramping up/down of the inverter takes a few seconds to match it, resulting in overshoots of the grid setpoint. Heard someone mentioning on an youtube video that if the loads are instead installed on the AC outputs the ramping up/down is almost instantaneous resulting on much smaller overshoots, but found no info on it. Does anyone know if this is the case?

grid parallel
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1 Answer
Jason - UK avatar image
Jason - UK answered ·

@Paulo M you are correct. The ET112 is not very responsive. I have the Victron 100A CT sensor on the incoming mains supply to allow my Multiplus to power assist the loads connected before the multi (loads on AC in) then I have everything else connected to AC out1 which makes the ESS very responsive.

I did have a ET112 but I removed it for that very reason, in that it is unresponsive. The Victron 100A CT sensor is not as accurate bit provides a improved response time from the inverter when in ESS mode.

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