[RE-wrenches] Sunny Island battery OCP

[penobscotsolar at midmaine.com]

Hi William,
   I wonder as well. About two months ago we installed a 20 kW off grid
system using two SI6048's with Midnite Solar's BOS and while it made
for an extremely heavy (two piece) powerpanel, it has performed very
wel and seems that Midnite has done the homework for us in providing
excellent OCP. They are definitely worth a look.

Daryl



> HI William,
>
> I agree with your choices below, but I"m  curious why you decided against
> the midnite Epanel for the SI?
>
> thanks
>
> jay
>
> peltz power
>
>
> On Feb 10, 2014, at 9:33 PM, <william at millersolar.com> wrote:
>
>> Friends:
>>
>> Thanks for all of the replies.  Here is what I have learned so far
>>
>> 1.       The SMA fuse blocks are not UL listed for installation in the
>> USofA.
>> 2.       The Square D switches are not high enough in amperage for
>> battery circuits.
>> 3.       The bolt-switch idea is great if you want fuses and a pullout.
>> Not for me.
>> 4.       Our solution will be an Outback FX 1000 with three 250 amp
>> breakers.
>>
>> I am not that thrilled with the lack of information or BOS on the Sunny
>> Island line.  SMA was very vague about recommended OCP value and wire
>> gauge.  This is not in the spirit I am use to.  I understand a
>> disclaimer, but please, give it up with a rule of thumb to get us
>> started.  I finally received a broad hint that for the SI4548 or the SI
>> 6048 the recommendation is for 250 amp breakers and 4/0 wire within
>> reasonable distances.
>>
>> William
>>
>
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