Post
by Token » Tue Jul 10, 2018 9:25 am
They didn’t publish the locked rotor current for the compressor so we gotta guess a bit.
If 4A max in steady state cooling we will guess that it is 8A surge for startup.
8A x 120V = 960W
So a 1KW inverter should handle it just fine.
For 480W steady state cooling draw, your 12V battery will be dumping out 80A to the inverter. Probably need at least two big batteries.
Two 100Ah deep cycle batteries in parallel would be enough to provide 2 hours of operation while reaching no lower than 50% discharge. The 50% is important and immutable.
Now the trick is how many and how big the solar panels.
You need to fill ~ 1KW of power back into the batteries and you have a good 6-8 hours of sun to do it.
This part gets tricky because the sun moves across the sky, panels get dusty and hot, someone puts a sarong on the panel to dry ...
200W of solar panel would just barely eek by and you would need to tend to it.
300W would be more care-free.
400W would be fantastic as it would allow you to run longer if needed and have a safety margin.
And finally, these are all best guess and you should allow for inefficiencies, unexpected losses, errors. When in doubt, go one bigger. For example going from 100Ah batteries to 120Ah batteries - good. 100 to 80Ah - not good but could work.
Good luck.
