List Your Mods:

Have you considered replacing the shower head with an Oxygenics shower head? I think you would find it much better with the stock pump.

Bahahahaha! 

Very nice, well done.  Looks great!

One salvage Tesla battery module (about 1 ft x 2 ft x 2 inches thick is 5.3 kwh and weighs about 50 lbs. Two would be better but either way that's not too much to consider size and weight to consider. Four industrial size solar modules (each about 1 x 2 meters or 40 x 78 inches would just about get to 1500 watts. Attached crosswize those would pretty much cover the whole trailer roof, with the roof a/c, spoiler and TV antenna removed, and weigh in at around 200 lbs. The minisplit condenser could go on the tongue where the batteries used to be.
Since the top minisplits are close to twice the efficiency of RV roof a/c's (which are better at making noise than cooling) that out to get around 5-6 hours of a/c operation a day. At a typical 50% duty cycle that ought to keep an rpod cool for around 10-12 hours daily (or nightly in a humid climate).

So it's quite possible with current technology, more a matter of cost and motivation to do the mod than space.

You'd be able to run the a/c fir around one hour per day continuous if it was sunny, your solar array was clear of shading, and you used no power fir anything else.


The math is:

Power requirement of a/c 1600 watts
Inverter efficiency: 85%.
Battery discharge voltage 12.5V

DC load on batteries

1600/.85/12.5= 150.6A.

or 150.6 amp hours for one hour continuous operation.

Solar output at 1 sun and 25 degrees C: 500 watts
solar module temp on summer day : 65 degrees C
module temp derate 0.5% per degree or (65-25)*0.5 = 20%
Typical sunny day irradiance : 5 sun hours
Charging voltage 13.5V

Solar array output to batteries

500*0.8/13.5*5=148 amphours per day.

An hour a day isn't veryp practical. To cool the trailer for what most ppl would consider a reasonable period of time you'd need to chanfe out the crummy roof a/c for a high efficiency minisplit, put in 1500 plus watts of solar, and about 5kwh plus battery capacity.