[RE-wrenches] Battery Backup for Older Enphase Systems

[John]

We did one a few months ago using Outback VFX3024e, 1000 a/h battery bank - basically an Off-Grid system but tied into the switchboard, with customer nominated circuits dedicated to the Off-Grid system.  The grid is acting like the backup generator via a relay.

The only little hiccup was that when the *generator* was called on, the Off-Grid system had to sync in with the real Grid, it was not immediate.

Apart from that - seems to work O.K.			John,    GoSolar Ltd,  Christchurch, N.Z.

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-----Original Message-----
From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Matt Sherald
Sent: Friday, 10 November 2017 3:43 a.m.
To: RE-wrenches
Subject: [RE-wrenches] Battery Backup for Older Enphase Systems

I'd appreciate some ideas as to what backup system designs work well with the older Enhase equipment (M250/215 era).

I've tried this at home with a XW4024, but the frequency rise causes the lights to flicker and it is awfully unpleasant.

A customer of mine has asked about backup to go with an array that uses M250s and this prompted me to write.

Thanks in advance!

-Matt

--
Matt Sherald
PIMBY Energy, LLC
NABCEP Certified Solar PV Installer®
304-704-5943

www.getpimby.blogspot.com
www.getpimby.com
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