[RE-wrenches] Pulse 250 power center

[Joel Davidson]

MessageWe got our customer fixed up thanks to your help and advice.
Joel Davidson
  ----- Original Message ----- 
  From: Allan Sindelar 
  To: 'RE-wrenches' 
  Sent: Thursday, January 01, 2009 7:16 AM
  Subject: Re: [RE-wrenches] Pulse 250 power center


  Bob and Joel,
  Depends on the powercenter model. Only the oldest APT/Ananda models used Square D QOU breakers for DC. APT's later units (the 4B) used QOU only for AC, and used Heinemann CF for DC. By the time the brand was Pulse all DC breakers were Heinemann (or maybe equivalent Airpax), and thus rated 125V DC.

  The bigger problem was that the later models (and other models too) lacked sufficient breaker spaces; the 4B had 5. With 2 for PV input, 2 for PVGFP, and 1 for DC loads, that left no room for expansion.

  By the way, what is the name of the most recent iteration of Pulse, that followed Connect Energy? Just a few years ago, they were developing a 48V grid-tied with batteries inverter. I had also heard that they had none of the earlier personnel, just the name and intellectual property, and were to be approached very cautiously.
  Allan

  -----Original Message-----
  From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of robert ellison


  The better bet is the MPPT controller but keep in mind that the original breakers are not rated for the series panel strings that we use now. The Square D breakers are only UL rated for 50 volts not the typical 70 - 96 volts we see now.

  Here's to a great new year,

  Bob


   On Wed, Dec 31, 2008 at 1:26 PM, Joel Davidson <joel.davidson at sbcglobal.net> wrote:

    Hi Allan,

    Good idea bypassing the old charge controller. I'll pass it on to our customer.

    ...and good memory. The Ananda people did the PV industry a real service by making the first UL listed power center.



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