Yes, they make a 3 pole class T fused disconnect. You could have 3
strings fused separately and then combined in a single pull disco, UL
listed too. I even have one here, or I can provide their contact info.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 2/8/2014 6:59 AM, Richard L Ratico wrote:
Ray,
Way back in 2002, you mentioned using Boltswitch products for battery string
fusing
immediately outside the battery box. Might one of these be a partial solution
for William?
Dick Ratico
Solarwind Electric
--- You wrote:
I'm working on something similar. I think the Flex 1000 is the only
reasonable choice that can handle more than 2 of the large format DC
breakers. Midnite has the more expensive MNBCB -1000 Battery Combiner
box, but there just isn't enough documentation to figure out what it
can and can't do.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 2/7/2014 6:29 PM, will...@millersolar.com wrote:
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
--- end of quote ---
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