rsmith16384.noip.me
"Current Goal: 4 hours runtime
Current Ability: 10 minutes runtime"
"410W Window AC unit"
"150F super-capacitor – This should keep the compressor from drawing so hard on the batteries, which I’ve seen peak to 1300w on startup, on battery alone to the Air Conditioning has tripped the inverter protection mechanism, I think supercapacitor would prevent that, and be a really good buffer because when things start up, the solar is not always charging the batteries because sometimes they are fully charged"
I figure 2000W starting, 5x rating. That is what I've measured for a similar size A/C.
I plan on putting 600w of solar panels on the roof of a small camper. The Panels will be able to tilt so I can get as much power as I can. My main use is to run a 5000 BTU AC tha draws 450w in the summer and a 500w space heater in the winter & a few little items like phones, tablets and led...
diysolarforum.com
I think your marine/staring batteries are perfect for supplying the starting surge. It will help if they're fully charged.
They should work fine for this application as long as they are never cycled.
"1500W Inverter – Pure Sine"
What is it's surge rating? Watts and seconds?
The inverter is high up on the rack. How long are the battery cables? What gauge?
At say 10V while starting A/C, 200A draw. At 100A per battery, much less than starting a car.
"(4) 100W Mono panels
(1) 20A Solar Charge Controller – MPPT (2 Panels)
(1) 20A Solar Charge Controller – PWM (2 Panels)
(1) 20A Solar Charge Controller – PWM (unused)"
When aimed directly at the sun, the 100W (STC) panels on MPPT should deliver 85W (PTC) each.
The panels on PWM only deliver their current, maybe 65W each.
When aimed directly at the sun you may get 300W.
Suggest more panels, say 1000W. You could get four, 250W panels for about $200 total.
Wired 2s2p with one string of two aimed at an earlier time of day and one string of two aimed later, you get flatter power production.
Instead of 850W (PTC) peak, more like 560W peak and a broader peak. You would need an MPPT SCC for at least 50A to capture all power produced, but 40A should be sufficient to keep up with the A/C. Need 100 Voc for these two panels in series.
store.santansolar.com
The Epever 4210 40A MPPT Solar Charge Controller has high quality and low failure rate components to ensure service life. Only $140!
store.santansolar.com
The idea is to have PV operate A/C directly without draining battery. Arrange for AC to shut off as soon as battery needs to discharge to power it.
