Just curious, what's the advantage of switching at the array vs. just
using a Sunny Island or Outback system? Seems this would cost more, and
have less efficiency, since you would still have the battery float
losses, backup inverter idle losses, in addition to the 2nd grid tie
inverter losses. Are there site specific conditions driving this that
I'm not understanding?
I've done quite a few GT systems w/ battery backup, so I'm always up for
new ideas though.
Ray
On 11/7/2011 12:15 PM, Larry Crutcher, Starlight Solar Power Systems wrote:
Hi Glen,
That model is a disconnect switch. What the system needs is a 4 pole
transfer switch, automatic or manual, to connect the PV source to the
charge controller.
Hello Gary Willit,
Yes, you've grasped my concept precisely and I agree, getting a high
voltage DC transfer switch may nix this design. Sounds like a product
for Midnite Solar to build.
Larry Crutcher
Starlight Solar Power Systems
On Nov 6, 2011, at 1:42 PM, Glenn Burt wrote:
Siemens makes a line that are UL listed.
Their VBII series like HNF361PV -- 30A
-Glenn
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