I have 2 18K's on 4 strings (2 each) with 30KW LP4 battery rack all from SS. I'm all electric, they are (as I type) running my whole house. This morning at 9AM in Phoenix AZ: Load in the washer, load in the dryer, charging the NiroEV @ 24A, GF running blow dryer, 4T A/C. It will drive it, but the A/C wreaks a bit of havoc on start. I've got a kit on the A/C, but I'm looking into a couple of options to prevent in-rush, soft-start kit helped, but the lights still blink when it comes on. Only pulls around 18A when running. I'm in another thread talking about the A/C in-rush issues. I've been running for 2+ days now. I need more battery to make it thru the night, and I will need more panels to fill them up. I've got 32x455W, but I plumbed electric for 16 more panels (2 strings) to max out the units. Still don't think 60KWH will take me from ~6PM until 7AM unless I replace the 4T with some splits or something, but yesterday I got over 80KWH from the panels, just need to make sure I have a place to store the juice. My highest daily utilization last year according to my LPC was ~135 KWH / day. Should be able to manage it pretty tight with 120KWH/day of panels.
I will close with this: I bought 5 generic 5K units for a fraction of the cost that literally fell over when the A/C cut on. As in completely off, no breakers, but cycle all power to get the displays back on. These 18ks' seem fairly robust so far. They blink the lights, the UPS's in my office, on the TV all kick on for an instant whenever the A/C kicks, but like the hair dryer and the EV charger you only see a little skip... I think the unit dislikes rapid change, in either direction up or down, but it will handle it. See graph below:
View attachment 155763
I'm running an SBC with current sensors at each of the panel legs to neutral... The inverters came back on at ~ 7:15. I have the SBC controlling relays that allowed the car charger to kick on an 9AM, precisely the time the GF decided to drop a load of clothes in the Dryer, and then blow dry the hair pushing the peak leg to around 60. I'm still struggling with getting the behavior I want, I do not want to tie to the grid in a shared arrangement, but I think these units are thus far, definitely capable of handling the load. I might also mention these are rated at -20C (or something) to 60C. The room these are mounted in was 110F or around 43C ambient. The fans don't even cut on until the loads get over about 50 amps.
THAT is pretty impressive to me, it get's ridiculously hot here. Supposedly at 45C the units 'degrade'. No indication of what the means in the latest version of the manual.
