[RE-wrenches] Paralleling CC

[Ray]

Oh well maybe I'm completely full of Hot air on this fine Friday 
morning. Sorry, I just assumed it could be set to 12v. II just checked 
the specs, and it actually is only compatible with 24 v and up battery 
banks.

Personally I run the PV numbers on a calculator and when I multiply 100 
amps x 12 v  (1200 watts) and only get 4 of yesteryear's solar modules 
on a controller that cost more than the array, I always, always talk the 
client into going to 48v, or I don't touch it, cause its all archaic 
equipment I don't want to take responsibility for.

Sorry again for making a bad assumption.

Ray Walters
Remote Solar
303 505-8760

On 4/24/20 1:20 PM, Jerry Shafer wrote:
> Wrenches, Ray
> How do you program a FM 100 to 12 volts, l do not see that's 
> programmable to be set to do that
> Jerry
>
> On Fri, Apr 24, 2020, 10:16 AM Ray <ray at solarray.com 
> <mailto:ray at solarray.com>> wrote:
>
>     This is a classic off grid conundrum we've dealt with for decades.
>     Generally it take more money than the client wants to spend. 12 v
>     is a
>     serious limitation, not just for the PV array, but the inverter and
>     battery layout as well.  What inverter do they have?  How old is it?
>     What battery are they running?  How old is the battery?  What are
>     their
>     expansion needs?  How far is grid away?
>
>     I look at all these things when working with the owner of one of
>     these
>     legacy 12 v systems.  Generally it costs serious money to rewire to
>     higher voltage, but it usually solves multiple problems that they
>     needed
>     to solve anyway.
>
>     On the other hand, if you want to stick with 12 v, you CAN use the FM
>     100, and just use the MATE 3 to program the controller, then pull it.
>     We have numerous FM 100s, and we have only one MATE 3 that lives
>     in the
>     shop.  It brings the cost to the customer down significantly and
>     prevents unnecessary tampering with settings. $600 for the MATE 3 is
>     just stupid.  You can buy a decent laptop for that.
>
>     Ray Walters
>     Remote Solar
>     303 505-8760
>
>     On 4/24/20 10:39 AM, Jay wrote:
>     > Hi All,
>     >
>     > Are there any CC out there that can parallel on the input side?
>     >
>     > Situation is a older 12v system, 300’ wire run using a MX 60.
>     >
>     > Client wants more PV, but CC is maxed out. Upgrading to say
>     FM-100 is way expensive and needs new mate etc.
>     > Yes could totally redo the system to 24 or 48v and use iota for
>     12v loads. Buts that’s  expensive.
>     >
>     > Installing new wire would be complicated and expensive. But wire
>     is large enough to handle more power.
>     >
>     > Are there are any cc that can parallel on the input side, which
>     would be the easy solution if it exists
>     >
>     > Thx
>     >
>     > Jay
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