[RE-wrenches] Battery based grid tie question.

[Michael Welch]

Hi William. The SW's own roadblock got removed many years ago. I got PG&E to approve SW serial number 00011 (as I recall) for an installation in Arcata in a non-net-billing intertie. This was brand new to them, and as far as I know the only other SWs running in CA were off-grid betas, and one guerrilla.

At the time, they wanted the certificate of compliance to prove it would not island, and it required a fair amount of back and forth with Trace engineers. (Now those guys are with other companies we know and love.) I think that eventually, they actually did their own testing on that model in San Ramon.

But I thought the CEC listing service was supposed to supercede all that. At least that is what it took for my OutBack inverter to be approved for intertie a few years back. Is the XW not listed with the CEC?

BTW, I sold a SW2512 on eBay in '05 for $1,136. There are two SW4024s on eBay right now, no bids yet.

William Miller wrote at 11:12 PM 3/25/2009:
 
>2. We have an application to the local utility (PG&E) pending for a three XW installation with a motor-generator.  We have received multiple communications from PG&E doubting the acceptability of the XW system for use as a gird-tied battery-back up system.  We are hoping that PG&E accepts the listings from the various agencies and approves the project.
>
>Interesting that the old, non-complaint system receives swift approval but the latest and greatest gear hits a regulatory road block!  We'll keep you posted.