[RE-wrenches] DC Fuses on TL Inverters

[Mike Kocsmiersky]

I believe that when you have a TL inverter that has two channels you may have up to two strings, unfused, going into each channel.  Thus leaving you with four strings of modules with no fusing.  

 

Mike Kocsmiersky

Principal

Phone: 413 883-3144 

Spirit Solar

www.SpiritSolar.net

 

 

From: Jerry Shafer [mailto:jerrysgarage01 at gmail.com] 
Sent: Friday, January 29, 2016 6:07 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] DC Fuses on TL Inverters

 

Wrenches
We have been installing combiners with anything more then 1 string on the TL inverters. Troubleshooting is better with a remote combiner, its seems a waist but all our inspectors to like to see it also. 

On Jan 29, 2016 10:36 AM, "Mark Byington" <markb at cobaltpower.com> wrote:

 

"Transformerless inverters need fuses on both DC positive and DC negative legs to protect the inverter in case of ground fault."

 

I could be wrong, but my understanding is that TL inverters are no different than transformer type inverters in terms of DC fusing requirements - no fuse required for one or two strings in parallel; fuses required on + and - leads for 3 or more strings in parallel.

 

Mark Byington

Cobalt Power Systems, Inc.

 

 


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