Yes, these should only be used to get a grandfathered system back up and running(no ARC fault just GFDI) or a off-gridder that is not going to have any concerns...
Oh, and back when we were doing these at SMA in the test area we had a "special" rom set that made this conversion from 240 to 208v easy.
If one wants to go back to 240vac from a 208vac unit I use sunny data and re-program the AC window using Sunny Data and PC.
Note; the data label should/needs to be be marked up to reflect what the Inverter actually is!
I would not use a XFMR.
Louis, RE Repair/Solar Cowboyz
-------- Original Message --------
Subject: Re: [RE-wrenches] SMA SB 2500U
From: "Kirk Herander, VSE" <[email protected]>
Date: Tue, May 18, 2021 3:42 am
To: "" <[email protected]>
These older Sunnyboys do not comply with latest UL standards regardless. If its a new installation, a savvy utility / AHJ will catch this.Owner|Principal, VT Solar, LLCCelebrating our 30th Anniversary 1991-2021!!dba Vermont Solar Engineering802.863.1202On 5/17/2021 3:53:26 PM, William Miller <[email protected]> wrote:Jay:
Some years ago I mis-ordered 5 SB2500s for 208 three phase and it turned
out the system was 240 VAC three phase (open delta). I had to return the
inverters to the factory to be converted and I had to rewire all of the
arrays. So no, I don't think this can be done in the field.
William Miller
Miller Solar
17395 Oak Road, Atascadero, CA 93422
805-438-5600
www.millersolar.com
CA Lic. 773985
-----Original Message-----
From: RE-wrenches [mailto:[email protected]] On
Behalf Of Jay
Sent: Monday, May 17, 2021 11:44 AM
To: RE-wrenches
Subject: [RE-wrenches] SMA SB 2500U
Does anyone know if you can convert a
SMA SB2500U ( old red inverter) from 208 to 240vac?
Without using a boost transformer.
Thx
Jay
Peltz power.
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