So I finally grew balls and plugged the inverter output into my expensive rack.
I bypassed the SurgeX because I think it probably wouldn't except an ungrounded connection.
Everything seems to work great.
After running at 520ish watts for 1.5 hours it finally got hot enough to kick on the fans (the thermal sensors and fans work).
Sort of warm... it appears to be the transformer that gets hot. Fans run for like 30 seconds every 15 minutes at this load after >1.5hours.
The UPS and SurgeX stuff is all 20a sockets in my room, but only draw 300ish watts though.
Just quickly threw the panels outside at ground level and connected 5 in series (not the most optimal nor the final configuration.) Even still, was able to generate about 350-400watts rms from 5 100w panels in full summer afternoon sunlight .
525watt draw for 303watt load. Efficiency is low because of improper sun-angle and also because this inverter is WAY OVERKILL for this small of a load.
The load is: all networking equipment, the entire DSP rig, HTPC + 40inch 4K LED monitor, phone chargers, streaming box, and the 7705 and BD player on ghost power.
I usually only have the 7705/player/projector on during movies, and in that case the 40" monitor is off.
The wiring and charger isn't getting warm at all, everything is room-temp at this power-level.
Won't be able to power the lights, microwave, fridge, popcorn maker or AC/heatpump until I get the 2nd sub-panel and ATS wired up. At which point the efficiency should improve with the increased load.
I'll definitely need a larger battery bank and more panels to increase up-time and load-handling. This inverter could easily run a medium sized cabin. I probably could have just bought the 4kW version instead, which is more efficient at these smaller loads.
Anyhow... interesting initial-results none the less.