[RE-wrenches] offgrid system question

[Peter Parrish]

I haven't been following this thread carefully, too busy, but my advise is,
don't focus on current capability alone. From Xantrex, find out the "voltage
compliance" as well. By that I mean, "What is the voltage at 52 amps output?
Does it vary over time from 1 msec to 5 sec?" Any motor will need both a
voltage and current to operate properly, and they tend to draw more and more
current as the source (inverter) voltage drops. 

 

- Peter

Peter T. Parrish, President
California Solar Engineering, Inc.
peter.parrish at calsolareng.com 

  _____  

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Phil
Undercuffler
Sent: Tuesday, August 19, 2008 7:40 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] offgrid system question

 

The XW6048 is rated at 52 amps RMS line to line between 5 seconds down to 1
millisecond, so if your client's AC has a starting inrush surge of 104 amps
at 240v, then yep, I think your biggest problem is not enough inverter.
Sounds like just one additional inverter will be marginal; depending upon
the additional background loads you may want to consider expanding to three
total.  I think Mick Abraham is right on here, in his earlier post.

 

Phil Undercuffler

Director, Battery-based and Off-grid

Conergy Sales & Systems, Americas

Our World Is Full of Energy

1730 Camino Carlos Rey Suite 103

Santa Fe, NM  87507

 <mailto:p.undercuffler at conergy.us> p.undercuffler at conergy.us

Direct | 505.216.3841

Toll Free | 888.396.6611 x4841

Fax | 505.473.3830

www.conergy.us <http://www.conergy.us/> 

  _____  

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Max
Balchowsky
Sent: Tuesday, August 19, 2008 6:45 AM
To: mick at abrahamsolar.com; RE-wrenches
Subject: Re: [RE-wrenches] offgrid system question

 

You're right Mick, It is an XW 6048, there's only one and I really think I'm
going to find that the biggest problem is that there is not enough inverter
capacity capacity with just one unit (the scematic shows a 60 amp breaker on
the output). The system is new ( installed within the last 4 months and the
batteries were new) The AC unit is 240 volt.....

 

Max Balchowsky

SEE Systems

 

 

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