[RE-wrenches] FM80

[Jesse Dahl]

When I was looking at the Outback Flexone setup today during some down time I notice that they send that package out with an 80A PV breaker and an 80A GFDI breaker. If a person had an array up at 2500W and a 24V battery bank, on some occasions,  wouldn't this lead to tripping of the 80A breaker on the output side of the charge controller? 

2500W/24V (just for math sakes)=104A 

Jesse 

Sent from my iPhone

On May 28, 2013, at 10:10 AM, "SunHarvest" <eric at harvesthesun.com> wrote:

> Jesse,
> 
> I have an FM80 on an array of 2560 STC; all off-grid. The only issue I have is that when my batteries are full, and I have essentially zero loads, and the sun is shining away, my XW will disconnect and my house will lose power. I have to reset the system to get back online. This, I'm pretty sure is not a malfunction of the FM80, but rather an issue with the XW, just haven't had time yet to fully trouble-shoot. I think it's a matter of reconfiguring the XW charging setpoints. I haven't had any direct issues with the FM80 with this STC "over power" set up.
> 
> Eric
> SunHarvest
> (530)98-3738
> 
> ----- Original Message ----- From: "Jesse Dahl" <dahlsolar at gmail.com>
> To: "Wrenches" <RE-wrenches at lists.re-wrenches.org>
> Sent: Friday, May 24, 2013 8:06 PM
> Subject: [RE-wrenches] FM80
> 
> 
>> Hello,
>> 
>> I'm working on bid for a system using the FM80 controller. The specs for the controller say the maximum STC wattage for a 24V system is 2500W.  The array I want to use has a STC wattage 2550. I called outback to ask if this was "close enough" today and didn't get a reply (holiday weekend?!) I also called the distributor I buy my parts through and they said it wouldn't be a problem.
>> 
>> I don't want to lose warranty of something happens.  I don't want to use different modules.  I don't want to have to add another controller and split up the array just for 50W.
>> 
>> Thoughts?
>> 
>> 
>> Have a good holiday weekend!
>> 
>> Jesse
>> 
>> Sent from my iPhone
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