I have a question regarding the energy overview in the Victron dashboard.
Over the past year, I’ve noticed a significant discrepancy between the energy charged from solar into the battery and the energy discharged from the battery to consumption.
According to the dashboard:
Solar to battery: 2322 kWh
Battery to consumption: 1245 kWh
This leaves a difference of more than 1000 kWh, which seems quite large to me.
Could someone explain what might be causing this difference? Is this expected behavior, or could it indicate a configuration or measurement issue?
Dont forget your system also consumes power.
And is probably not included in the battery to load figure.
A 30kVa three phase system for example can use 1kw to 1.5kw per hour just running itself while working.
Yes, I definitely understand that there is self-consumption in the system, but 1077 kWh over the course of one year seems quite high to me for a single-phase installation with an MP-II 48/5000/70.
I also made a comparison with my own installation, which uses three MP-II 48/5000/70 units in a three-phase setup. In that case, the difference is “only” 606 kWh.
Installation with 1077 kWh difference: MultiPlus-II 48/5000/70-50, 4× Pylontech US2000C, Cerbo GX, 1× MPPT 250/100, and an external current clamp for AC measurement.
My installation with “only” 606 kWh difference: 3× MultiPlus-II 48/5000/70-50, 3× Pylontech US5000, Cerbo GX, an EM24 energy meter, 1× MPPT 150/100, and 1× MPPT 150/60.
Apologies.
Realised this is battery in and out.
Yeah Pylontecs are not the best at this.
But yours is at 53% which is much lower than the average 65 to 75%.i have seen in some set ups.
The real question then is how often they ‘balance’ and cycle. And whay kind of amps the power is moving in and out at. Paet of their inefficiency is also the stacking.
With other brands and higher voltages i have seemn much higher efficiency which is why the market is moving that way (even pylons newer models)
If I check mine I have:
4190 battery to loads
7.3kWh battery to grid.
4437 solar to battery
527 grid to battery
So net 4964kWh to battery, 766kWh in losses or just under 16%.
For such a large delta above it looks like there might be some missing/inaccurate metering.
I happen to have battery heating pads and they also consume energy. More than I like. But these are simply required with low temperatures. Still cold here. Might this be a contributing factor as well for the OP?
