BFL13 wrote:
...On inverter high voltage alarm, I can see in the winter when a controller with temp comp would raise the set point from say 14.8 to 15.1 and this trips the inverter at 15v. But in summer, temp comp would make that 14.8 into 14.6, so what's the problem?
I have two different brand inverters and they both have 15v high shut off. What inverters have such low high voltage shut offs that they quit at nominal (no temp comp) 14.6ish volts???
Or are we seeing some sort of voltage drop problem here with a too thin, too long set of wires????
It doesn't take winter conditions to be cool but sunny. This past weekend while camping it barely made it into the low 70's for a high and morning temps were in the 40's. Temp compensation begins to increase voltage below 77 degrees F. My inverter says its high voltage shut off is 15V as well. I am a little annoyed that it trips at 14.8ish, but it is a cheapo inverter off ebay so I can expect to get what I paid for. I've been driving the setpoint down even further because I'm trying to find a sweet spot where the quick spikes from dropping load on the inverter don't get high enough to fault the inverter. It is the spikes causing the faults, not steady state operation.
As I've mentioned in this thread, I've got ~5' wire runs for both controller and inverter. 4 gauge wire on the solar, 0 gauge on the inverter.
