Solar-Power too high in VRM?

Question

question

puitl asked Apr 7, '22

Hi!

I have 10kWp Solar and 3x Multiplus 2 3000 (3x 2400W constant-power = 7200W).
> But no energy-meter!

In the picture you can see that the MP2 are powering 7359W into the grid/house and 82W are going into the battery = 7441W total.

8389 - 7441 = 948W...where are they? :)

- Power-consumption from the Multiplus itself?
- Measurement deviations because i have no energy-meter?

(CVL was set down here at 54,8V so there wasn´t any bigger current going into the battery)

VRM

vrm-pv-power-too-high.jpg (37.1 KiB)

2 |3000

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Answer 1 · 2022-04-07T07:01:45Z

nickdb answered · Apr 07, 2022 at 07:01 AM

Converting DC to AC has overhead, so you will always see more being produced/used on the DC side - 10 to 15%.

2 |3000

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Answer 2 · 2022-04-07T08:24:00Z

puitl answered · Apr 07, 2022 at 08:24 AM

Ah ok thank you!

Until now i thought there is only about 70W loss in each Multiplus...but then i have to consider the converting itself too.

2 |3000

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