BFL13 wrote:
...But not sure why inverter does not revert to normal when voltage drops below 15 instead of needing a reset. (IIRC the OP)
His 14.4 (if real and not like my 14.4 vs 14.6 nominal) is way too low below 15 to take care of this, so something else must still be going on there I guess.
I see my unloaded voltage is about 14.6, which is the high set point, so that means the loaded voltage is lower (natch!) as seen, so how come the OP's unloaded voltage goes over his set point---weird!!!???
Anyway, that's what I got for what its worth. Can't think of another way to test it out.
Thanks for doing your own study, it is great to read about different setups and behaviors and compare them to what I see with mine. Regarding why my inverter doesn't reset itself, I think it was pianotuna that suggested that only higher-end inverters auto-reset. Mine is certainly not high-end and it does not auto-reset, I have to cycle the power switch to clear the fault. That's why it doesn't automatically start working again once the battery voltage reading settles back down to below the inverter HVD. I wish it did.
As far as why my inverter faults at a voltage that appears to be a few tenths less than 15V, which is its claimed HVD? I don't have an explanation, but this is essentially the true source of my issues and I think the only piece of my equipment that isn't operating "normally". I suspect it is tied to the fact that my inverter is quite inexpensive for a 1500W PSW inverter and I don't expect it to fully deliver on all of its claimed specs. This isn't a name brand product, it is a direct from Asia unit from an ebay seller with a pretty Asian lady modeling the inverter in the auction listing. I believe she was holding the inverter in one hand and a hair drier in the other.
Regarding why my unloaded voltage goes over my setpoint, I think it is normal behavior based on what you observe with your tests with nearly charged batteries and higher resistance. I experience my inverter fault when it is loaded (lightly) but charging is still able to occur right at the max voltage setpoint. Then the load is removed and I experience the voltage spike. My CC does react to clamp the voltage back down to the setpoint, it just takes it up to a second. Not fast enough for my inverter which shuts down on HVD as it sees the spike. Why can't my cheap inverter have an associated cheap/slow HVD response instead of fast and at less-than-advertised??!! Then I bet I would not be having any issues.
