New E21 Boondock Ready(5.1KwH solar system)

[Brian B-P]

Originally Posted by rubicon327

... my 9,000 BTU Fujitsu 9RL2 mini-split draws 580W in economy cooling mode compared to your Dometic 11K BTU rooftop at 1180W...

Those values imply an EER (energy efficiency ratio) of
9000 BTU/hr / 580 W = 15.5 BTU/(W•hr) for the Fujitsu, and
11000 BTU/hr / 1180 W = 9.3 BTU/(W•hr) for the Dometic.

Originally Posted by E Ticket

I understand that there are inverter type mini-splits that can have SEER rating as high as 30 SEER or more.

SEER (the seasonal average EER) is lower than the ideal EER. I think a SEER of even close to 30 is unrealistic to expect.

[rubicon327]

Originally Posted by brian b-p

those values imply an eer (energy efficiency ratio) of
9000 btu/hr / 580 w = 15.5 btu/(w•hr) for the fujitsu, and
11000 btu/hr / 1180 w = 9.3 btu/(w•hr) for the dometic.

Seer (the seasonal average eer) is lower than the ideal eer. I think a seer of even close to 30 is unrealistic to expect.

I'm probably being a bit unrealistic. The 580W was an estimation (70% of the rated 830W) with the unit in economy mode, but the more I read it simply adjusts the set point upward so the average energy use is lower by increasing cycle time. The published values for the 9RL2 Fujitsu are a modest 10.9 EER and 16 SEER. Not horrible, but they have more efficient units that go up to a 18 EER / 33 SEER but unfortunately they are all 208/230V.