Dan, I think it is Gree that has a PV direct mini-split heat pump for both heating and air conditioning. It may have run on two 250 watt modules. When in non-PV mode, I believe the AC is rectified to DC and run through an inverter. And there are now a few others as well….possibly Fujitsu.
Bill Dorsett Manhattan, KS From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Dan Fink Sent: Wednesday, March 09, 2016 8:07 PM To: RE-wrenches Subject: [RE-wrenches] PV-direct air heating? I have an interesting question I haven't run into before, using existing equipment, some in place, some just waiting for an install. Has anyone here ever done an MPPT PV-direct install to DC air heaters? Advanced Energy used to have a PV-direct MPPT water heating controller, but the residential division of their company no longer exists. We are looking at 1200-1500 watts of PV. How would one program a Midnite Classic (for example) to most efficiently connect PV to DC heating elements without a battery bank/diversion load setup, whether for water or air? This one's new to me; I've never tried PV direct heating before. Thanks in advance for any input. Dan Fink Adjunct Professor of Solar Energy Technology, Ecotech Institute IREC Certified Instructor™ for: ~ PV Installation Professional ~ Small Wind Installer Executive Director, Buckville Energy NABCEP Registered Continuing Education Providers™ <tel:970.672.4342> 970.672.4342
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