[RE-wrenches] 30 kW Inverters

[Brian Teitelbaum]

Peter,

The Sunny Tower will work at 240VAC three-phase, with no modifications. Since it contains 6 regular SMA Sunny Boy's, they are each configurable for 208, 240, or 277VAC. I don't see any reason why it wouldn't work in a "high leg" configuration also. Another advantage of the Sunny Tower is that it has separate MPPT for each 1/6th of the array. One problem...the Tower at 240VAC is not listed on the CEC list, although the manual clearly states that it is usable at 240V three-phase.

The  Xantrex GT30 is not yet available from Xantrex. Latest due date is Sept/Oct. It's a transformer-less design (yea!) with a CEC rating of 96% (at least that is what is advertised)

As per Jeff C's suggestion, two Solectria 15kW units will work fine too, and they are US made. And the Fronius inverters 11.4-3....

PVPowered's 30kW is real sweet and also US made.

And, of course, the Satcon 30.

Enphase?

Too many choices!

Brian Teitelbaum
AEE Solar




From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Peter Parrish
Sent: Tuesday, August 11, 2009 9:50 AM
To: 'RE-wrenches'
Subject: [RE-wrenches] 30 kW Inverters

We haven't designed/installed a 30 kW-dc class system for some time now (last time we used a Xantrex PV 30) and are currently investigating what is available in terms of single inverters with 240V 3Ph output. Our customer has enough roof space to for 58 kWp of modules, but we have to split the AC output into two separate services. So the first thing I've noticed is that there are not many inverters in the 30 kW range: Satcon PowerGate 30, Xantrex GT30 and by comparison a Sunny Tower with 6ea 6 kW SB inverters.

We will be feeding 240 3P so the GT30 and ST will need transformers.

So, I'm inclined to look more carefully into the PowerGate 30, first.

I am looking for some feedback from folks who have recently installed 30 kW inverters. If this is contained in an archived thread, please direct me appropriately.

- Peter

Peter T. Parrish, Ph.D., President
California Solar Engineering, Inc.
820 Cynthia Ave., Los Angeles, CA 90065
CA Lic. 854779, NABCEP Cert. 031806-26
peter.parrish at calsolareng.com<mailto:peter.parrish at calsolareng.com>
Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20090811/32cc5d9f/attachment-0004.html>