[RE-wrenches] Sunny Island Battery Disconnects
william at millersolar.com
william at millersolar.com
Fri Feb 7 17:29:04 PST 2014
Friends:
I am reworking an installation with 3 Sunny Island inverters. The battery
leads have no disconnecting means or OCP. I have been looking for sensible
hardware to provide this and I have found some options. I am interested in
any input on these or ideas I have not discovered.
1. SMA BATFUSE. I am having trouble deciding which one is right for a
3 SI install.
a. The B.003 appears to have fuse positions for the positive and the
negative leads. I am fairly darn certain I don't want fuses in the negative
leads of a negative bonded system, and although this is my first SI install,
I am pretty sure this is negative bonded. Am I missing something here?
b. The B.001 has only positions for two fuses as far as I can see from
the manual.
c. So it looks like neither will work for me. Does anyone have any
experience and/or wisdom here?
2. Midnite Solar E-panels:
a. The regular panel has DC and AC components. I want to control the
AC elsewhere so I could order three slave units. The Midnite unit mounts
right under the inverter but I would prefer to have the OCP closer to the
batteries.
3. Outback:
a. We could purchase an Outback FX1000 and install three breakers in
it.
4. Breaker Size:
a. I have started to read the manual but I have yet to find out what
size breaker fuse is recommended. Have I just not found it yet?
b. Also, I have not found a specification for battery cable size. Am I
blind?
Thanks in advance. I really appreciate the help I receive here. I try to
give as well as receive.
William
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