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Thomas Pfeifer avatar image
Thomas Pfeifer asked

Is there a way to "convert" a Multiplus 12/1200/50 to 24/1200/25?

Hi there, we have an exisiting 12 V system with Multiplus 12/200/50, MPPT 75/15, BMV700, and two Lead-Carbon batteries (in parallel). We are currently investigating the options to raise the DC-Voltage level to 24 V. MPPT and BMV should accept that easily, batteries could be wired in series - but how about the MultiPlus? Is there any way to "convert" that to a 24/1200/25-configuration (by dip-switches, software configuration, or whatever)?

Thx in advance.

MultiPlus Quattro Inverter Charger
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Matthias Lange - DE avatar image
Matthias Lange - DE answered ·

No this is not possible. It is a hardware limit. You have to buy a 24V Multi for that.

Also have in mind that the MPPT needs a PV voltage 5V higher than the battery voltage to start charging.

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Thomas Pfeifer avatar image Thomas Pfeifer commented ·

Hi Matthias, many thanks for your quick answer and valuable information. Regarding the MPPT minimum PV voltage: We have one PV panel only, which has ~25..30 V when sun is shining (see VRM plot below). Would you consider that critical?

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