Help with SW problem... [RE-wrenches]

[Ezra Auerbach, Trace Engineering]

Hi all,

I'm with Don on this one.  I've run all those type appliances except oil
furnace off my SW4024 for over six years and nothing has even glitched let
alone burnt out.  Heck I also ran most of those loads from an old U series
with no real problems except the photocopier which would almost never run from
the inverter.  (It did work fine with the SW).

About the only idea I have is to wonder if all these loads were kept plugged
in while the inverter was in search mode.  I always unplug (or control with a
power bar) loads which will try to start the inverter (i.e. phantom loads like
the TV instant on circuit).  Like I say, it's my only thought on the matter.

Good luck.

Ezra Auerbach

"Roy Butler, Four Winds RE" wrote:

> I sure hate to admit I'm stumped, but here goes...I have a customer with a
> single SW4024 who says her appliances keep burning out. So far (she says)
> she's had several appliances fail...her TV, furnace, washing machine,
> microwave and today...her refrigerator. Needless to say, she's pretty
> ticked off. My question to her was why did she tell me after the
> fact....these appliances failed over a 6 month period. I did not get a
> chance to look at the old appliances...I do know that the microwave was
> over 15 years old (!) as is the fridge. No clue on the TV or washer age.
> The furnace was only 1 year old (an oil burner) and it blew up! According
> to the insurance adjuster, oil accumulated in the combustion chamber and
> then ignited. I know how oil burners work and this sounded like a control
> problem to me...aren't there safety controls in place to prevent this from
> happening??
> System specs: SW4024 (w/ DC250) set to float mode w/ grid usage timer set
> to charge during off peak nighttime hours...900 watts of solar w/ Trace
> TC60 controller...1050 AH battery bank (Surrette CH375)...and all working
> according to specs. I have LA302AC surge arrestors in both the grid fed
> breaker box and the inverter fed sub-panel...LA302DC arrestors in both the
> DC250 and the sub-array combiner box. System and house grounding is up to
> code, as is my installation...I've done a lot of these SW installations and
> not had any problems until this one. I'm stumped!!!
> Please let me know if you have heard of similar problems or if you think of
> anything else I should check!
> Sleepless in NY
> Roy Butler
> Four Winds RE
>
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 <michael.welch at homepower.com>
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