Is a standard compressor type fridge sensitive to the waveform of the AC driving it? (ie do I need a flash pure sinewave type inverter or will the bog ordinary square waveish thing do the job).
ceebee2,
Feb 19, 2:34pm
Brand and capacity would help
macman26,
Feb 19, 3:30pm
Normal fridge will need a reasonable sine wave or the motor will have issues. Square wave from past experience won’t give you full power from an induction motor. The good news is sine wave inverters are cheaper now than what they used to be. Better off getting a 12 or 24 V dc fridge and run off batteries. A lot more efficient. I get almost double the life running from a battery for an Engel off 12V than via a 12-240v sine wave inverter.
moby,
Feb 19, 3:47pm
Thanks, Macman.
rohoman,
Feb 19, 9:08pm
Agree with macman - go for a low voltage DC compressor fridge. Higher voltage is better (less loss) so 24 V is better than 12 if you have that voltage available. There are some very good ones around with uprated insulation so they're much more efficient and hold their temperature longer. There's some interesting reading here: https://www.rvworldstore.co.nz/appliances/fridges/12v-24v-fridges Another option is to get a standard mains operated fridge and have the compressor swapped out for a DC unit. You can get conversion kits which come with the compressor, controller, temp sensor etc. You just need a refrigeration technician to do the plumbing and re-gassing etc.
elect70,
Feb 20, 1:47pm
Can buy 12 Volt DC fridge . . Using PV on ordinary 230 v fridge make sure its big enough to handle starting current .
trade4us2,
Dec 21, 2:44pm
We ran freezers and fridges for 3 days OK on a non-sinewave generator. And ran everything else in the house except for one TV that didn't work.
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