SW2512 and pump problems [RE-wrenches]

[Windy Dankoff, Dankoff Solar]

<x-flowed>>Wrenches,
>I have a customer with a SW2512, 1400AH battery. Every time pump comes on,
>system browns out enough to cause computer and TV problems (crashes and
>resets).  Pump is 1/3 HP 115 VAC two wire sub pump, approximately one year
>old.

This is to be expected with a 2-wire pump. It lacks the separate 
start winding of a 3-wire pump (with control box to cut the start 
winding out).

>Even browns out with open discharge from pump.

The load on the pump does not effect the magnitude of the starting 
surge, but only (maybe) its duration.

I would suggest either switch to a 3-wire pump (somewhat less 
surge/use one with a Franklin 1/3HP motor, 115V), or a Grundfos SQ 
electronic motor AC pump (soft start, no surge). Efficiency is 
probably similar with either of these, except for the no surge with 
more expensive SQ.

Another possibility is to pump once a day, or once every few days, 
into a storage tank, then use a DC pressurizing pump like Flowlight 
Booster Pump, to handle the frequent pressurizing.

I could suggest a DC submersible pump, but with a 12V system, 
pressurizing, your choices are severely limited.

For more info on inverter sizing relative to pump HP and type, see 
our web site, Reference, Water Supply article on inverter power for 
AC subs.

Windy
-- 

	===========================

	From the solar powered office of
	     Windy Dankoff, President

	===========================

Dankoff Solar Products, Inc.

    Wholesale distributor of solar-electric equipment
    Manufacturer & distributor of solar water pumps

2810 Industrial Rd.
Santa Fe, NM  87505

(505) 473-3800
FAX  473-3830
E-mail:	  info at dankoffsolar.com

SEE OUR INFORMATIVE WEB SITE AT:

http://www.dankoffsolar.com

	===========================

	To contact Windy Dankoff directly:
	Most days I am at my home office
	e-mail:  windy at dankoffsolar.com
	   tel/fax:  (505) 466-0059
	   ~ amateur radio KE5HV ~

	===========================

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