I have a system with 3 FM 80s running in parallel with an FM 100 added
later. Works fine, just not connected via the HUB. I don't quite
understand the voltage ratings. You would just have a 300 v rated
breaker on the PV side of the FM 100, so I totally don't see what having
150 vdc rated breakers for other circuits in the same box is an issue.
All the wiring is THHN rated at 600 vdc. This sounds like a solution
looking for a problem.
Ray Walters
Remote Solar
303 505-8760
On 5/15/20 12:48 PM, William Miller wrote:
Jay:
On the FM100 landing page
<http://outbackpower.com/products/charge-controllers/flexmax-100>.
The warning is pasted below.
/Due to the different voltage ratings, OutBack Power does not
recommend mixing the FM100-300VDC with the FM60 or FM80-150VDC
controllers on the same battery bank.///
Interestingly the warning is not seen on the FM100 AFCI landing page
<http://outbackpower.com/products/charge-controllers/flexmax-100-afci>.
I thought I saw this also in one of the Owner’s manuals but I looked
today and can’t find it there. Interesting…
I have a client that wants to add a fourth PV array to a system with
three FM80s. This will require a fourth charge controller. Being
able to run smaller wire in the existing conduits is an attractive
proposition, making the FM100 a desirable approach. I now have to
figure out if I can add the FM100-AFCI (which is apparently the only
version available) to a system with three FM80s, and if I do, what do
I do with the existing GFDI breaker and how do I arrange the DC bond?
There is a lot to consider here.
BTW, I was told by a tech support person for an on-line sales firm
that the original FM100 did not have the AFCI but those units have
been discontinued. Now all FM100s have the AFCI capability. I am
weighing if I want AFCI if it is not required. My territory includes
central California wild lands so I suppose I should take advantage of
any fire safety means at my disposal…
William
*From:*Jay [mailto:jay.pe...@gmail.com <mailto:jay.pe...@gmail.com>]
*Sent:* Friday, May 15, 2020 7:34 AM
*To:* will...@millersolar.com <mailto:will...@millersolar.com>;
RE-wrenches
*Subject:* Re: [RE-wrenches] Outback FM100
Hi William
Yes downsizing breaker to meet load is no problem. And getting wire
that big into it with 1” KO is a pain.
I’m pretty sure any hub will work, needs 3S mate
Where in the manual did you find the “don’t mix with other 60/80
controllers?
Jay
Peltz power
On May 15, 2020, at 12:46 AM, William Miller <will...@millersolar.com
<mailto:will...@millersolar.com>> wrote:
Friends:
I have occasion to try the FM100 charge controller. I am
wondering of anyone had found any quirks with implementing this
device. I have a few specific questions:
1.I want to avoid AFCI unless mandated. Will this be defeated if
I don’t run the leads through the sense coil? (There is an AFCI
and non-AFCI version but I can’t seem to find the non-AFCI version
anywhere.)
2.I noticed the manual indicates you are not supposed to mix the
FM100 with the FM80 or 60 in the same battery system. This
negates it for one project I had in mind. I am curious as to why
this is. Anyone know?
3.Will the FM100 work with a standard hub?
4.I suppose this unit requires a 125 amp breaker. If the PV array
cannot support that full 100 amps I might down-size the OCPD
accordingly. Anyone contemplate this question?
Thanks in advance.
William
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