Run a mini-split off a MSW inverter??

Xringer · 03-25-11, 11:50 PM

I'm thinking it might be possible to run a mini-split off a MSW inverter..

I've been trying to find someone who has done it, but no luck so far.

I'm not 100% sure, since I don't have the schematics, but I think there is
a very good chance that my Sanyo does not have any transformers or any AC motors.

If that's true, then using MSWs should cause no harm.
If it's not true, and there is a small transformer for the logic supply,
maybe there's a way around that..

Xringer · 04-13-11, 07:49 AM

Hello Sanyo,

I was looking at this case study on your website.
SANYO :: HVAC :: HVAC/Solar Integration- Offgrid Solar

I own a Sanyo 24KHS72, and I'm wondering if it would be possible to use
it with a 5kw 60Hz 230vac Modified Sine Wave (MSW) power inverter?
Instead of a true sine wave inverter.

The reason I'm asking, is because MSW inverters are dirt cheap,
compared to true sine wave inverters. And the MSW units seem
to work very well on some AC systems.

I think many of the off-grid folks in north America would be
very interested in a low cost way to use their solar arrays
to power a very efficient Sanyo mini-split.

A Mini-split that was known to be capable of using off-grid power sources
like MSW inverters or even low cost gasoline back-up generators,
would be of great interest to many prospective Sanyo customers.

Thanks,
Rich

Xringer · 04-29-11, 11:46 PM

I took a look at the main PCB in the outdoor unit today..(On the leaky unit).

You can see the symbol for transformer 3" from the bottom, 2" from the right.
I peeked under the bottom covers and the transformer is about 0.5"x0.5" square.
So, I'm guessing it's not running very much power. Maybe 1 or 2 watts.?.
On the bottom of the board, it looks like the secondary of the transformer
goes right into some resistors and transistors..
So, the transformer might just be a 60hz sample point.. A grid failure checker.?.
(Since it's way too small to supply all the digital logic on the board..

Right now, it looks like the outdoor unit is a good candidate for using a MSW inverter..
Now I need to remove the covers from the indoor unit and take a peek at the board.
My guess is, there will be a similar transformer in that one too..

03-25-11, 11:50 PM	#1
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	Run a mini-split off a MSW inverter?? I'm thinking it might be possible to run a mini-split off a MSW inverter.. I've been trying to find someone who has done it, but no luck so far. I'm not 100% sure, since I don't have the schematics, but I think there is a very good chance that my Sanyo does not have any transformers or any AC motors. If that's true, then using MSWs should cause no harm. If it's not true, and there is a small transformer for the logic supply, maybe there's a way around that..

04-13-11, 07:49 AM	#2
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	Letter to tech support Hello Sanyo, I was looking at this case study on your website. SANYO :: HVAC :: HVAC/Solar Integration- Offgrid Solar I own a Sanyo 24KHS72, and I'm wondering if it would be possible to use it with a 5kw 60Hz 230vac Modified Sine Wave (MSW) power inverter? Instead of a true sine wave inverter. The reason I'm asking, is because MSW inverters are dirt cheap, compared to true sine wave inverters. And the MSW units seem to work very well on some AC systems. I think many of the off-grid folks in north America would be very interested in a low cost way to use their solar arrays to power a very efficient Sanyo mini-split. A Mini-split that was known to be capable of using off-grid power sources like MSW inverters or even low cost gasoline back-up generators, would be of great interest to many prospective Sanyo customers. Thanks, Rich

04-29-11, 11:46 PM	#3
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	Transformer found on main board I took a look at the main PCB in the outdoor unit today..(On the leaky unit). You can see the symbol for transformer 3" from the bottom, 2" from the right. I peeked under the bottom covers and the transformer is about 0.5"x0.5" square. So, I'm guessing it's not running very much power. Maybe 1 or 2 watts.?. On the bottom of the board, it looks like the secondary of the transformer goes right into some resistors and transistors.. So, the transformer might just be a 60hz sample point.. A grid failure checker.?. (Since it's way too small to supply all the digital logic on the board.. Right now, it looks like the outdoor unit is a good candidate for using a MSW inverter.. Now I need to remove the covers from the indoor unit and take a peek at the board. My guess is, there will be a similar transformer in that one too..