[RE-wrenches] TL Inverters

[frenergy]

Mark, 

        The only thing I would add to all your good points is the addition of a 7700 watt TL which is of course perfect to stay under the 20% for load side connection of a 200A service.

Bill



  ----- Original Message ----- 
  From: Mark Byington 
  To: RE-wrenches at lists.re-wrenches.org 
  Sent: Tuesday, October 07, 2014 6:58 AM
  Subject: Re: [RE-wrenches] TL Inverters


   

  Just a word of caution to those not having experience with SMA TL inverters - the larger units (7-11 kW) have an extremely narrow input DC voltage window.  Depending on your module voltage and string design, all you need is a module or two to be shaded to fall out of the MPPT input voltage range.  The smaller units (3-5 kW) with the Secure Power Supply don't have this problem.  We no longer use these larger SMA TL inverters unless we can do maximum string length (e.g. strings of 8 for SunPower 96-cell) and there is zero shade at the site.

   

  I believe SMA is in the process of adding larger units to the line that has the Secure Power Supply.  They added the 6 kW unit earlier this year, and just announced the 7 kW unit with Secure Power Supply.

   

  Mark Byington

  Cobalt Power Systems, Inc.

   

   

   



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