Air compressors have a high surge current and the SW5548 doesn't handle
surges that well. I'm surprised you even got the compressor to run. Adding
more capacitance for the startup might help.
Mike Kocsmiersky
Principal
Phone: 413 883-3144
Spirit Solar
www.SpiritSolar.net
-Original Messag
On 5/30/2016 1:48 PM, Jeremy Rodriguez wrote:
Bob
Can you elaborate a little on this extension cord idea either here or
off-line? Thank you
Sure. The extension cord, in this case, is just added resistance. Some
inductance but
mainly resistance. The current from the starting load is reduc
Bob
Can you elaborate a little on this extension cord idea either here or off-line?
Thank you
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!
On May 30, 2016, at 1:15 PM,
"b...@midnit
Yes, the SW4024 and SW4048 could start larger surge loads than the
SW5548, because both allowed the output voltage to dip farther under
surge. The 5548 was more tightly regulated in order to reduce the
flickering caused by the voltage dip of a large motor under load.
I learned this around 2002
boB, a spongey line on a load? Done it with windmills, never with a load.
Makes complete sense to me, I'll add that to the old bag of tricks.
Dan Fink
Adjunct Professor of Solar Energy Technology, Ecotech Institute
IREC Certified Instructor™ for:
~ PV Installation Professional
~ Small Wind Install
Hi jeremy,
The 5548 has really poor surge, it's not a wire issue.
I'm not sure caps will fix that.
Jay
Peltz power.
> On May 30, 2016, at 9:46 AM, Jeremy Rodriguez 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 inv
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
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
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
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