[RE-wrenches] Pulse 250 power center

[Allan Sindelar]

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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