The mini splits are coming,

ken56 wrote:
I am putting one into a small addition I just put on my home, 224 sq. ft. but it is not hooked up yet. 9000 btu unit with a 13 seer. We shall see how well it does.

thats a pretty crappy unit to be honest, 13 seer at 9k? must have been a cheap unit

I am putting one into a small addition I just put on my home, 224 sq. ft. but it is not hooked up yet. 9000 btu unit with a 13 seer. We shall see how well it does.

I see mini splits with SEER close to 30. Amazing.

I'd just go for a rooftop unit with the SEER of the mini split. Current rooftop units are way behind home S&B systems in terms of SER. a typical rooftop 13.5K BTU unit has a SEER of about 10. (BTU out/watts in).

A SEER 20 similar to a mini split would drop the power by 2x, down to about 700watts, along with a decent LRA spec of 20A or so and bingo, easy to run the AC from a 2000W inverter generator with power to spare, easy to start with a 1000VAish inverter, ability to run for a reasonable amount of time from a reasonable sized battery bank and bigger rooftop or portable solar system.

I always thought SEER rating was kinda goofy. A resistance heating element has a SEER of 3.5. IMHO a better rating would be BTUout/BTU in. Then a resistance heating element would have a SEER of 1, a SEER of 3 would be 3BTU out for every BTUin. A better measure of unit efficiency.

Hi timmac,

You would need one compressor and 3 evaporators.

wa8yxm wrote:
How many BTUs?

9000 BTU's as to the link in the video, I would need 3 for my 33 foot motorhome and a lot of batteries to go solar A/C..

I will stick with my 2 roof tops for now...

Inverter minisplits have been in use in Mexico for some years now. We have three in the house. Funny though, the cost in the U.S. is almost three times as much.

I also want to get rid of that boat anchor on my roof and have a decent cooling system in the travel trailer.

A more practical way would be for the current manufacturers to make an inverter unit similar to a typical rooftop. Yes it would cost more but way more efficient.

Before you get all excited about installing one on your own. I have 3 Daikin mini splits in my house that I self installed. If I had room for the evaporator (inside unit) in my little Toyota I would install one in a heartbeat.

However the main reason mini splits fail is due to improper installation. The new 410A run at up to 700 psi and need to be put in right. Not rocket science but proper installation is a must! I have hundreds of dollars invested in AC tools in order to do proper installations.

How many BTUs?