TheOracle

Hi all, I recently replaced my old inverter with a Victron Phoenix 12/250 to power a koi pond pump that runs continuously. I'm monitoring the system in two ways: A plug-in energy monitor at the AC side reports that the pump is drawing 58 W. My BMV-702 battery monitor, however, shows that 80 W is being drawn from the battery. This suggests the inverter is using around 22 W, which seems like a lot for such a small load. What’s interesting is that with my previous inverter, the difference was only around 5 W for the same pump and monitoring setup. I’m aware that inverter efficiency drops at light loads, but I didn’t expect it to be this noticeable. The Victron is supposed to be a high-quality unit, so I’m wondering: Is this normal behaviour for the 12/250 model? Is there any way to improve efficiency at light load? Has anyone had similar results or found better options for running small continuous loads? Any insights or comparisons would be appreciated. Thanks!

Yes, the issue was related to a Tuya smart breaker I added.

Yes I did, I configured it like this:

My battery cells seem to be in balance

I spoke to early, it happened again today except the soc went to 98% I have to switch off the inverter for the voltage to go back to normal.

You correct, my bad. Please see here for more details about my system:

@Coulomb, my apologies I only saw your post now. I have my Solar Assist connect to the inverter and PylonTech battery so I assume the soc is from the battery. Again thank for your input.

Thanks for everyones input, I really appreciate it! I think I fixed the issue! I added this Tuya smart breaker to my electrical panel last week, but it turns out that was the culprit. Once I disconnected it, everything went back to normal.

My Axpert is misbehaving again. It only charges to 89% and then after a while the battery voltage go very high and the solar panels disconnect. Here is my current settings: I did upgrade my battery firmware recently:

Today my soc stayed on 89%

I upgraded the firmware, hoping it would solve an issue I had with the battery. In the afternoons, once my battery is fully charged, I use my excess solar power to heat my koi pond. I automatically switch off the heater once the battery's state of charge (SOC) is 94%. But what happened was that the SOC stayed at 94%, although the battery still had a good charge. Unfortunately, the upgrade didn't help. Today the SOC actually went down from 94% to 93%.

I have upgraded my battery, the version now is B68.6.0.0 (23-07-07) I received the bin file from PylonTech.

Can someone please let me know where can I get the latest firmware for my Pylontech US3000C battery?

I was looking at this today and the automation works to shutdown the inverter, but it doesn't start the inverter again. It change the shutdown voltage to 52v at 13h30 and the inverter shutdown, but it doesn't change it back to the original value(47v) at 13h35. So the inverter doesn't come back on again. I was able to change the value manually back to 47v and then the inverter starts again.

I believe I can shut down the inverter using power management automation by setting the shutdown battery voltage to 51V. However, how would I restart the inverter again at 5am.