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jay2000 avatar image
jay2000 asked

Voltage difference between multiplus and battery voltage

Hello Community, I’ve got a multiplus 12/1600/70 Compact and have difficulty charging to 100% due to the multiplus reading a false voltage value from the battery. The multi is reading 13.83v and at the battery it’s 13.23v, the distance between them is 700mm and connected by 35mm2 with a 250 Mega Fuse, however I’ve check all the connections and have isolated the solar and any other income sources of DC. I believe the issue is that the muliplus thinks the battery is full at 13.82 as defined in the preset, but in true the battery is actually sitting at 13.23 (70%). Thank in advanced!img-7137.jpegimg-7140.jpeg

MultiPlus Quattro Inverter Chargerbattery system voltage
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klim8skeptic avatar image klim8skeptic ♦ commented ·
@Jay2000 looks like voltage drop between the multi and battery.

Poor quality circuit breakers are a common problem. Measure the voltage both the multi's and battery terminals. Then measure the voltage drop across the fuses / breakers, connectors and along the length of the cables.

35mm cable wont give 0.6v drop by itself @ 70a.


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1 Answer
snoobler avatar image
snoobler answered ·

What does a separate voltmeter report?

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