GVFX3648 maximums?

[shastatodd]

Has anyone here worked with Outback FX inverters selling to the grid?
I'm asking this because I'm curious what the safe maximum load point is?

I recently had to change out a rack of failed modules and the new ones put out a larger amount of power than the old ones, which is taking my selling wattage from 2.8 kW to about 3.2 KW. The inverter ran pretty hot selling 2.8 so I'm wondering if it's going to survive selling 3.2 even though it's supposedly rated at 3.6 kW.

The FETS and capacitors are fine, but the transformer seems to be the big heat source.

I have seen the transformer typically run at 100 "counts" or 174f. Working hard this goes to 80 "counts" (lower is hotter) or 193f. The software throttles the unit back at 38 "counts" or 250f.
The FETS run around 165 "counts" or 121f. Throttle back on them is 79 "counts" or 194f.

Also that 30 amp cube relay on the AC board seems to fail after a few years of work. Yes 30 amps at 120 volts = 3600 watts, but even running it at 2800 watts (23 amps) seems to be hard on it.

This is of course dependent on ambient air temperatures and fortunately PV output sags with temp so those two things work together.

[Mike Curran]

I used to have a couple of GVFX3624s that sold to grid but my PV array (3.24kw) isn't large enough to really tax them. I will say that selling to grid shouldn't place any more stress on your inverter than an equivalent in loads does. Make sure the cooling intake filter(s) are clean - I found mine pretty gummed up once.

[shastatodd]

My power building has filtered air so years ago I pulled out that inverter intake air filter as well as the case's "bug screens" to improve the air flow.