[RE-wrenches] 3.7kW grid tie

[Peter Parrish]

SMA will sell a SB4000US programmed to limit the AC output current to 16.0A.
I think they designate it as a SB4000US-CL, or something to that effect.

Interestingly enough SunPower, which rebrands many of the SB inverters
(including the SB4000US) and sells them as SP products, has chosen not to
support this specific product, nor have they given any indication that they
are studying the situation with the goal of supporting the product through
their channel in the future.

- 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  
Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885

 
________________________________________
From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Dave Palumbo
Sent: Sunday, October 31, 2010 11:35 AM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] 3.7kW grid tie

AC Point of Connection could be to a backfed 20A DP breaker in the existing
GE TM3210CCU load center (100A MB with 100A busbar) if the SMA SB3800
inverter was still available. But a SB4000 requires a 25A breaker which
violates the 120% rule with the existing panel.
Comments on the options below. 

#1) Go with another 240v grid tie inverter in the 3800W range, so we can use
a 20 Amp breaker. I see PV Powered and Kaco have 3500’s listed. Any 3.7, or
3.8kW inverters?

#2) Is it possible to either, change out the Main Breaker in the above GE
load center to a lower amperage MB, or add a Plug In Breaker. There is a GE
“feeder type” breaker # THQL2190 (90 A DP). Could we use this as the main
breaker for the load center above? It is listed as a 10KAIC breaker.

#3) Swap out existing 32 space load center and replace with 150AML panel
with 100A MB kit.

Thanks,
Dave Palumbo