[RE-wrenches] Outback FM80's connected to Hub

[Walt Ratterman]

Hello all,

 

I agree there is no “no-brainer” answer to this, but two thoughts:

 

Fist, are there any reasons NOT to connect the charge controller to the Hub, if you have all of the right equipment there anyway?

 

And….

 

Second – although I don’t believe this algorithm is fully functional yet, the SOC management, based on the FNDC would “communicate” with the FX inverters and the charge controllers if everything is via the hub.  This could be beneficial in systems where you have both solar and generator / grid charging going on.

 

Thanks,

 

Walt

 

Walt Ratterman

SunEnergy Power International

 

11 Laurel Lane South     Washougal, WA   98671

(360)-837-3680   ▪   fax (360)-837-1315   ▪   Skype  Walt-Mobile

wratterman at SunEPI.org   ▪   www.SunEPI.org <http://www.sunepi.org/> 

 

 

 

 

 

 

 

From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Kent Osterberg
Sent: Monday, January 04, 2010 4:16 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] Outback FM80's connected to Hub

 

benn,

Since this system already has a hub to stack the inverters, the charge controllers may as well be connected to it.  The cat 5 cables are cheaper than extra temperature sensors.  The advantages of being networked: The temperature compensation is coordinated with a single temperature sensor.  Both charge controllers will change operating modes together (the older MX 60 wouldn't do this) so one isn't in float while the other is still in bulk mode.  The equalize command from the Mate is global so the charge controllers are supposed to equalize when you set the inverters up to equalize (the MX 60 was supposed to do this to).  I don't know of any disadvantages, but the advantages are actually pretty minor.

Kent Osterberg
Blue Mountain Solar


benn kilburn wrote: 

Wrenches, 

 

I have just set up an off grid system for a client and am now weighing out the pros and cons of connecting the two FM80's to the Hub or leaving them charging the battery independently.  

 

The system consists of an FW1000 with two stacked VFX3648's.  The two FM80's are mounted under the inverters and each is connected to it's own array. One is 3.4kW on a roof and the other is 3.6kW on two poles.

Outback has commented on this and has offered no convincing reasons for connecting them to the Hub.

 

Any comments or experiences?

 

Cheers,

benn


DayStar Renewable Energy Inc.  

www.daystarsolar.ca

benn at daystarsolar.ca

780-906-7807 

HAVE A SUNNY DAY 

 

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