I am using two EP600 units in ‘off-grid parallel’ mode. I have recently noticed that when charging via PV (DC + AC), only a maximum of 6 kW is used to charge the (both?) EP600 units; the rest is fed into the grid as surplus energy.
The PV output (DC + AC) is shown in green and the grid feed-in in blue. The difference corresponds almost exactly to the 6 kW used to charge the batteries. Charging starts at 11:30am; before that, all surplus energy is fed into the grid.
.
However, according to the data sheet, ONE EP600 should have a PV charging capacity of 6 kW:
.
Does this mean that only one EP600 is ever used to charge all 8x B500s, whilst the second EP600 is idle? With DC PV only, it would be logical for the EP with the DC PV input to handle the charging. But in my case, the DC component is small (~1.5 kW) whilst the AC component is around 12 kWp. Both EP600s could therefore utilise the AC component, as both are connected in parallel to the same phases.
.
Does anyone else have two EP600s in off-grid parallel mode and could check for me what the maximum PV input power is?
@BLUETTI_CARE,
I’ve been observing this for a few days now and have noticed some strange behavior when charging via PV (DC+AC).
Since I don’t start charging until around noon (to feed power into the grid in a grid-friendly way), I’ve noticed that both (!) EP600s are apparently charging at the maximum input power of a single EP600 (6 kW).
What’s strange, though, is that starting exactly at 1:45 p.m., this limitation is lifted, and for the rest of the time, all available power is used for charging rather than being fed back into the grid as surplus! In my case, that amounts to about 8.8–9 kW instead of the maximum 6 kW, depending on the PV system’s daily output.
.
This behavior was already noticeable on May 26:
.
Here’s a view from my SmartMeter in the distribution panel; the reading shows exactly the power being fed into the grid. Around 12:45, I start charging the battery (previously, all power was being fed into the grid); starting exactly at 13:45, no surplus power is measured being fed into the grid, since from that point on, everything (!) is being charged into the battery.
.
Where is this hidden feature located, and which parameter sets the time to 1:45 PM?
In the EP600 settings, I don’t use a scheduler, there’s only one setting: “Discharge from 00:00 to 23:59,” but “Time of Use” is disabled for me. I can’t find a parameter anywhere that uses the value 13:45.
. @BLUETTI_CARE , can you please verify this or explain how I can disable the 6 kW limit, especially since it becomes inactive at 1:45 PM anyway…
