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Alperin avatar image

PV power to the battery/consumption from the battery

Hello guys!

I have a three-phase ve bus system with two PV chargers.

I think I have some problems with in/out power calculation on the VRM portal.

If I take one-day data from VRM its looks like the PV to battery power more than the battery to consumption power. So how it's happening? If I take from battery-less then I use where the excess power is going?

battery chargingbattery capacitybattery system voltage
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JohnC avatar image
JohnC answered ·

Hi Al. How bad is it? Bad as mine?..

Flooded pb's, no BMV (so possibly a little measurement error), no dc loads. ~75% OUT vs IN.

Some loss in the Multi, bubbling off water is likely involved, the rest heat losses presumably.

Exotic batts will do better. Check for yourself, set VRM dashboard to 'last 7 days' or longer, hover mouse over the day for the daily figs.

The real world..




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