[RE-wrenches] offgrid system question

[Geoff Greenfield]

I love my Mitsubishi "Mr. Slim" split system AC unit.  I have a 9kbtu and a
15kbtu unit that share the same compressor.  I have had both units come on
at the same time while fridge, dishwasher, (gas) clothes dryer and staber
washing machine all running, on top of "regular" loads.  All this off of a
VFX3624!  I probably could have tripped it with a few more loads. but the
point is the GREAT performance of the "soft start" Mitsubishi technology!
These things don't really "cycle" as much as ramp up and down.  If folks are
planning for off grid AC I'd point them towards these.

 

I haven't yet rigged it, but I'm planning on using some simple relays to
control these as dump loads when I'm not around.

 

For a brighter energy future,

 

Geoff Greenfield

President

 

Third Sun Solar & Wind Power Ltd.

340 West State street, Unit 25

Athens, Ohio 45701

(740) 597-3111   fax: (740)597-1548

www.third-sun.com



Clean Energy - Expertly Installed

 

-----Original Message-----
From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Best Power
Mario
Sent: Monday, August 18, 2008 4:39 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] offgrid system question

 

Max,  Let us know if the AC unit is 120 or 240Vac, what inverter/s are used,
and how they are stacked.

 

Mario Monesterio

Best Power Intl.

----- Original Message ----- 

From: Max Balchowsky <mailto:max at seesolar.com>  

To: RE-wrenches <mailto:re-wrenches at lists.re-wrenches.org>  

Sent: Monday, August 18, 2008 3:00 PM

Subject: Re: [RE-wrenches] offgrid system question

 

 

Dear wrenches, going to look at a system installed by others and would like
some input from some of you with more off grid experience than I have ( 4
systems over the years). the system was put on a new home - off grid 20
sharp ND123UJF panels 4 modules in series - 5 parrallel strings, 2460 total
array dc voltage. mppt 60-150 charge controller, 12 sun extender sealed AGM
batteries, 305 AH at 12 vdc, wired for 915 AH at 48 volt DC. The system is
tripping off when the AC unit trys to start - AC is comfortmaker 3.5 ton 13
seer. They say start up inrush is 104 amps (sounds high to me) and they put
a DST 10 soft start on the unit (I think that's just a big capacitor). I
haven't been on site yet but it sounds to me that they just didn't design
enough inverter capacity into the system...... What are your thoughts?

 

Max Balchowsky

SEE Systems


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