Was: net metering two inverters plus MW/ Xantrex [RE-wrenches]

[Charlie Robb, Element Engineering]

David,

I am not sure if Trace SWs are have G77 compliance certification for grid
connection in the UK. If not, you need to add additional grid-fault
protection and the cost of an injection test.

This week I completed two PV systems, a grid connect and an off-grid. Here
there is no contest. Trace SW is the tool for big off-grid, and the Sunny
Boy is the champion of Grid-tie. Witness testing of the Sunny Boy was little
more than a friendly chat. It quietly gets on with its job, and the
power-line modem control unit is superb! Now there a 2.5kW Sunny Boy....

Don't go Michael!!!! We all get hosed from time to time, and I have almost
dried out after the AIR turbine discussion, while my customer has been
enjoying AIR-powered hot baths and never running his diesel generator.
Sometimes people just have to agree to disagree.

Cheers
Charlie

Charlie Robb
Element Engineering

77 Society Road
South Queensferry
Edinburgh
EH30 9XP      UK

Tel: 0131 331 5835
Fax: 0131 331 5848
Mobile: 07887 991866

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-----Original Message-----
From: David Palumbo, Independent Power & Light <ipl at sover.net>
To: Wrenches <RE-wrenches at topica.com>
Date: 22 August 2001 16:03
Subject: net metering two inverters [RE-wrenches]


>We are presently designing a system to be installed in Britain that will
use
>two SW4548E's 230v 50hz. We have been considering using a Trace SWI/PAR/E
>parallel stacking interface. However after reading Trace's owner's manual
>for the SWI/PAR it appears that using this device may prevent the utility
>inter-tie that is an eventual goal of the system.
>Therefore we are considering keeping the two SW's separate, each would feed
>it's own load center. One question we have is it OK to connect both of
these
>separate inverter's (same battery bank) AC input #1 to utility grid power?
>It would think that it should not be a problem, in that two neighboring
home
>systems can have inter-tied inverters. But the question still needs to be
>asked.
>
>Dave
>
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