[RE-wrenches] Compressor motor/SW+5548

[bob at midnitesolar.com]

The (newer) SW5548 was harder on over current protection, mainly because

it could put out more current than the SW4048...

One trick to try is to place a long(ish) extension cord between the SW 
and the load to give it a wee bit of series resistance.

Doing this would often reduce that OCP and help motors to start.

boB


On 5/30/2016 11:03 AM, Dan Fink wrote:
> Does your air compressor have an unloader valve, or can you install one?
> That should do the trick, sounds like you are just running into the 
> regular high surge current demand.
> Off the grid, compressors are in about the same nasty league as old 
> well pumps as far as surge demand.
>
>
>
>
> 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™
> 970.672.4342 <tel:970.672.4342>
>
>
> On Mon, May 30, 2016 at 10:46 AM, Jeremy Rodriguez 
> <allsolarjeremy at msn.com <mailto:allsolarjeremy at msn.com>> wrote:
>
>     Hello
>     I've got an SW+5548 that will barley start my air compressor. Once
>     it does run it shows 17 Amps on the inverters loads meter. During
>     start up it reads 60+ amps.
>     Do you think better capacitors would help the situation?
>     BTW I've never ran the compressor off grid prior.
>     I even tried #8 from the Breaker to the pressure switch, about
>     9ft, with no benefit. The compressor will only start with the tank
>     completely empty.
>
>     Jeremy Rodriguez
>     Solar Installation And Design Expert
>     All Solar, Inc.
>     1463 M St
>     Penrose Colorado 81240
>
>     Sent by Jeremy's iPhone. Sorry for typos and shorthand!
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