Bill,
Jay's idea of trying the other AC input is a good one, if you're not also grid-connected and if you're not using the inverter to send a start signal, either manually or automatically.
The 8.5 RMY has very good regulation, so if it tests out for voltage and frequency, that's probably not the issue. And even at high elevation, the 8.5 can easily handle max AC input that the SW4024 can draw - which Christopher Freitas tells me calculates out to 5647 W.

If you end up replacing it, either one would work fine. But why not consider a Magnum MS4024PAE, which has split-phase 120/240. Then the transformer is taken out of the system completely. Generally panels set up for straight 120 VAC can handle 120/240 without a hitch. The 8.5 can easily be reconfigured to split-phase as well.

As a rule of thumb, it takes about 2 kW of sine-wave inverter capacity per pump HP; 2.5 kW if mod-square, like DR. That's for a standard 3-wire capacitor-start submersible.

I'd be interested in knowing where other Wrenches are finding SW parts and service. We haven't had need for it recently, but still expect to be able to get service through Inverter Service Company in Albuquerque, a division of Direct Power & Water. Where else is service available, assuming someone has kept the original box for shipping?

I have a good used takeout unit if that's your customer's preference, although no box. Contact me off-list if this is of interest, and you have a box.

Allan
Allan Sindelar
[email protected]
NABCEP Certified Photovoltaic Installer
NABCEP Certified Technical Sales Professional
New Mexico EE98J Journeyman Electrician
Positive Energy, Inc.
3201 Calle Marie
Santa Fe, New Mexico 87507
505 424-1112
www.positiveenergysolar.com




On 4/14/2012 7:21 PM, frenergy wrote:
Wrenches,
 
        I have a customer that may be having some issues with the reliability of his 11 year old Trace4024.  If my current fix doesn't solve the problem, I have suggested having the unit fixed, which I think still happens on these puppies. I have also suggested replacing it with either an Outback 3524 or a Magnum MS 4024.  He is now running a 1 HP Submersible pump ala autoformer along with the usual array of  house loads.
 
        The issue is the inverter accepting and then rejecting the generator power, which I have been watching recent comments here regarding this issue.  I have not thoroughly checked out pump wiring (was apparently already done by the well/pump guy, whom is reputable), but have checked the output of the Kohler 8.5 genny and Hz and voltage appear stable with and without load.  So far I've gone the route of programming in a few less amps on the "battery charging" and "AC2 IN" functions.   The inverter seems to be happy with new settings, this new programming was just done a few hours ago.
 
        So this may be a more generic question for those with more experience than I: Are both the OB and Magnum inverters considered equally capable of replacing the Trace? I guess I'm thinking mainly of that pump, but are there other considerations?
 
        Thanks Folks
 
Bill
Feather River Solar Electric
4291 Nelson St.
Taylorsville, CA  95983
530-284-7849/6544 fax
solar powered since 1982


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