It was a Chinese-made Pioneer, I don't recall the model, but it was the larger of the two offered at the time (about 10 years ago), the smaller one had an AC fan, and the larger one was BLDC. It had a PFC boost function to about 400VDC. It was hooked to an 85kWh 16 module pack. Since the max voltage of this pack was inline with the PFC boost bus, it all worked perfectly. I just bypassed the PFC stage.
Even without PFC, any 240v appliance has to be rated to handle +/- 10%, so that's 264VAC or about 350VDC when dumped into a full bridge at the filter capacitor. Chances are the limit is going to be the voltage rating on those filter caps. Usually 400VDC, though some have better headroom at 450VDC. Some equipment targeted for industrial use is rated for 277VAC (one wye leg of 480VAC), in which case it's designed to see up to 305VAC which works out to about 405VDC. If you are wanting to do this the best way is to locate the service manuals for various units you are interested in, and then look at the wiring diagram. It's usually really obvious which uses AC fan motors. For instance, here's the wiring for the indoor unit on the LG unit I have in my shop, as you can see, it's fully capable of DC except for the built-in condensate pump, so you'd have to do something about that: (Picture Link https://ingineerix.com/pic/?lg-heat-pump-idu ) On Tue, Jan 16, 2024 at 4:46 PM Haudy Kazemi via EV <ev@lists.evdl.org> wrote: > That's pretty neat. Reminds me of what people have done with direct ties to > Prius packs (PriUPS). > > Can you share any specific mini split models that you have seen, or heard > of, being used this way? > > Which Tesla pack? Was this with a 350v DC (14 module) or 400v DC Tesla pack > (16 module) legacy Model S/X pack or some other Tesla pack? My napkin math > says the 350v DC packs have a better chance at compatibility. > > Was the pack still in a car? If so, did you run into any problems with the > car software making things harder than necessary? > > > > On Tue, Jan 16, 2024, 17:27 (-Phil-) via EV <ev@lists.evdl.org> wrote: > > > I have successfully hooked a Mini-Split (240v) up to a Tesla pack > > directly. You have to perform an analysis to make sure it can support > DC, > > and there are only a few that can, as most of the indoor-unit fans use AC > > motors, but there are a few that use BLDC. You would not be able to do > > this with a 120v unit unless it's internally using a capacitor doubler (I > > have seen a few that do this!). > > > > On Mon, Jan 15, 2024 at 5:58 PM Mark E. Hanson via EV <ev@lists.evdl.org > > > > wrote: > > > > > Hi Folks, > > > > > > I was reading Otmar's inverter connection to a Tesla-3 and looks like > > Tesla > > > makes it really difficult to run a 1500W 12V inverter from their EVs. > My > > > Bolt shows 130A available from its DC-DC converter, just clamp the > Harbor > > > Fright inverter (have 1500W with 200A inline breaker, short aligator > > > clamps) > > > on the battery & the Leaf appears to be rated about 90A, so probably > not > > > enough to run my mini-split at 12A, 120V. Presently if the power goes > > out > > > - I just put another log in my wood stove, but thinking it would be > nice > > to > > > run one of my EV's as the 64KWH power source incase the power goes out > > for > > > awhile. I have a Bergey wind turbine on LiFePO4 7KWH batteries, but > that > > > would only last a few hours running the Pioneer mini-split. Has anyone > > > done > > > this successfully? The Bolt has to be *on* in neutral or park with the > > key > > > in to keep the DC-DC converter alive. Would rather not have a Kerosun > > for > > > backup... > > > > > > Subject: Model 3 Inverter Power Connection - Otmar's Variety Blog > > > > > > > > > > > > https://www.cafeelectric.com/blog/2020/06/08/inverter-power-connection-1/ > > > > > > > > > > > > Have a renewable energy day, > > > > > > Mark > > > > > > Mark E. Hanson > > > 184 Vista Lane > > > Fincastle, VA 24090 > > > 540-473-1248 phone & FAX, 540-816-0812 cell > > > REEVA: community service RE & EV project club > > > Website: www.REEVAdiy.org (See Project Gallery) > > > UL Certified PV Installer > > > My RE&EV Circuits: www.EVDL.org/lib/mh > > > REEVA Demo: http://youtu.be/4kqWn2H-rA0 > > > Fincastle Solar Weather Station > > > > > > > > > > > > _______________________________________________ > > > Address messages to ev@lists.evdl.org > > > No other addresses in TO and CC fields > > > HELP: http://www.evdl.org/help/ > > > > > > > > -------------- next part -------------- > > An HTML attachment was scrubbed... > > URL: < > > > http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20240116/7bad2f8e/attachment.htm > > > > > _______________________________________________ > > Address messages to ev@lists.evdl.org > > No other addresses in TO and CC fields > > HELP: http://www.evdl.org/help/ > > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20240116/902f5de2/attachment.htm > > > _______________________________________________ > Address messages to ev@lists.evdl.org > No other addresses in TO and CC fields > HELP: http://www.evdl.org/help/ > > -------------- next part -------------- An HTML attachment was scrubbed... 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