MPP and battery charging. [RE-wrenches]

[Christopher Freitas - OutBack Power]

Darryl Thayer wrote:
> The 3000 watt system is charging through 3 RV products MPPTs. There is 
> no link between these controllers, could it be that the controllers do 
> not work well when in parallel without master slave relation?  And can 
> the MX60 work with other MX60? 

Yes - multiple OutBack MX60s will work together "out of the box" without 
any special wiring or master slaving required.  We considered a 
requirement for the design from day one.  We also worried a lot about 
working with multiple C40s, SW inverters - and yes - even on systems 
with mixed MPPT controllers.  

Requiring inter-communication, special wiring, external shunts etc. for 
the MPPTs to work together is a band-aid to underlying problems.  If it 
is designed correctly from the start it simply is not necessary or 
desireable.  Inter-communicating should be used to improve the operation 
(such as allow easy viewing of the meters or a single temp sensor 
coordination) but should not be required for proper operation together. 
A system should still operate correctly with the communication not 
functioning when possible.  
 
Making system "communicate" is not the "holy grail" or some ultimate 
solution - it can actually just result in more problems if not done 
correctly.  Making products that work together properly under a variety 
of conditions is the best solution.  Having separate communication 
systems for the charge controllers and the inverters sounds like a real 
mess to me.  

Christopher Freitas
OutBack Power Systems, Inc.
cfreitas at outbackpower.com  www.outbackpower.com
Tel 360 435 6030  Arlington WA USA

- - - -
To send a message: RE-wrenches at topica.com

Archive of previous messages: http://www.topica.com/lists/RE-wrenches/

List rules & etiquette: http://www.mrsharkey.com/wrenches/etiquete.htm

Check out participant bios: www.mrsharkey.com/wrenches/index.html

Hosted by Home Power magazine

Moderator: michael.welch at homepower.com
==^================================================================
This email was sent to: michael_welch at sbcglobal.net

EASY UNSUBSCRIBE click here: http://topica.com/u/?bz8Qcs.bz9JC9.bWljaGFl
Or send an email to: RE-wrenches-unsubscribe at topica.com

TOPICA - Start your own email discussion group. FREE!
http://www.topica.com/partner/tag02/create/index2.html
==^================================================================