Quote:
Originally Posted by NiHaoMike
It would be simpler to use a VFD, possibly in combination with a switchable displacement compressor for more dynamic range.
I'm actually looking at something like that for a thermal storage system, using a 2-4 ton switchable displacement compressor in combination with a VFD to try to match compressor power draw to surplus PV power available. That's pretty far out, however, as I will work on other parts of the solar power setup first.
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VFDs are getting cheaper. Still out of my price range though. What type of thermal storage are you working on?
I was working on a setup where a solar load diverter would power a compressor with off the shelf parts. There are some DC compressors that could work. I was thinking one of the 3 phase brushless units and a load diverter solar charge controller. I know of one charge controller thats PWM output. Not sure how that would work with a brushless motor controller.
I have a load diversion solar controller but I think I'm going too try diverting power to some LED modules for adding extra grow light in my greenhouse for now.