Howie,
In an ac coupled system with Outback inverters you could use a diversion
controller such as a Morningstar Tristar 60 on the dc side. That would
allow using an ac coupled system and a nicely controlled finish charge
for the batteries too. Since there is already a MX60 to do the finish
charge in the system you are considering, a voltage controlled switch,
like the Morningstar relay driver, could simply shut down the SB3000.
Kent Osterberg
Blue Mountain Solar
Howie Michaelson wrote:
Hi All,
I have done several AC coupled off-grid systems using Sunny Islands and
Sunny Boys, but I am now doing one with a dual stacked OB VFX3648 (with a
PSX240 on the Inverter out for load balancing) and a SB3000. There is
also an existing array that is running through an MX60. What I am
wondering about is how folks have set up AC coupled string inverters to
best utilize the solar gain while not toasting the batteries. I'm a big
fan of the tapering control offered by SMA through the frequency shift of
the SI's, but that's not available here. What relay/contactor setup have
folks found most efficient and safe? Thanks in advance,
Howie
_______________________________________________
List sponsored by Home Power magazine
List Address: [email protected]
Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
Check out participant bios:
www.members.re-wrenches.org
