#SBV SOC drop with no load

scot@gmx.at

Once or twice a week the battery charge on the #SBV4600 goes from 50% to 7% with a constant load of only 8w. Days prior under this load minimal depletion (8w for internet router) where is the power even going? Would be nice if battery SOC was part of the graph. Better yet if this problem didn't happen.

rex

If this is AC load then you need to take into consideration the inverter consumption which is about 1.6% per hour on the sbv 4600 on top of the load. Alo it might be related to SOC drift, the unit believes it has 50% but in reality it is different. This ca be mitigated by periodic full charge cycles. Alternatively please provide more info for debate or send email to support. Have a great day

Juwei

My SBV 6400 self consumes around 15W when just online: no AC or DC out enabled, the device is just online - I measured that when recharged 1,09kW after exactly 72 hours. Not sure about the 4600, but I guess since it is the same controller hardware, it will have a similar power usage. This will be approx 360Wh a day loss of battery capacity.
With enabled AC this will be even more, as @rex wrote.

Juwei

It is worth noting that the state of charge does not reflect the self-consumed capacity. It is always at 99%... It seems that only the active power consumed is measured.