[RE-wrenches] SWR2500U Inverter

[Brian Teitelbaum]

Joel,

The SMA SWR2500U inverter has been a long discontinued model. If you want to use an SMA inverter, go to the SMA website to use their excellent sizing program. Plug in the module, and your record minimum and average maximum temps for the site, and look for a current model inverter that will work. All of the "U" series inverters (except for the 700U) are discontinued models, and the "US" series are the current models.

If your min temp is not below 14⁰F, it looks like you can use all 24 in one series string with the 4000US inverter, but that gets you awfully close to 600VDC (595VDC) at 14⁰F. You might want to play it safe and drop one of the modules. Unfortunately, none of the SMA inverters will operate with only 12 modules in a string (with two strings). However, a Fronius IG-3000 will, so you might want to go with that, although it has a lower efficiency.

Brian Teitelbaum
AEE Solar



-----Original Message-----
From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Joel Davidson
Sent: Tuesday, November 17, 2009 4:56 PM
To: RE-wrenches
Subject: [RE-wrenches] SWR2500U Inverter

Wrenches,

Our customer has 24 each Kyocera KC130 modules and wants to go grid-tied.
Can he use an SMA SWR2500U inverter with the fan kit? Is there a better
inverter that will use all of his modules? If you have an SWR2500U or a
better inverter option for sale, please contact me off-list. Thank you very
much.

Joel Davidson

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