Solar Boost / C40 test [RE-wrenches]

[Allan Sindelar, Positive Energy, Inc.]

Bill,
I would expect to see 35V (but have not yet checked) because that is the
approximate MPP of a 24V array under cool ambient conditions. HP's TtW!
measured a range of 30.1-35.95, so I may be a little high; depends on
modules. Now I'm curious. In the next few days I'll check my input voltage,
let you know. BtW, HP measured an average efficiency of 97.2% O/I.
Allan @+E
----- Original Message -----
From: "Bill Brooks" <billbrooks7 at earthlink.net>
> Why would you expect to see 35 volts under any sunlight conditions (except
> below zero ambient temperatures)? You are quoting Standard Test Condition
> numbers that should only be used as a starting condition to then convert
to
> real conditions.
>
> Again, MPPT controllers are good for off-grid systems. The jury is still
out
> on whether they provide much benefit to on-grid systems. It will probably
> depend very heavily on climate-specific issues. In California, with our
> rainy winters and sunny summers, this makes MPPT controllers on
> grid-connected systems produce the same or less power than a system
without
> an MPPT controller. Remember, the controller can take around 5% of the
power
> just to operate. Our industry needs these controllers, but we have to be
> clear on when and how to use them. Hopefully RV will get their ETL listing
> soon so we can use them in inspected systems.


- - - -
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

==^================================================================
EASY UNSUBSCRIBE click here: http://topica.com/u/?bz8Qcs.bz9JC9
Or send an email To: RE-wrenches-unsubscribe at topica.com
This email was sent to: michael.welch at homepower.com

T O P I C A  -- Learn More. Surf Less.
Newsletters, Tips and Discussions on Topics You Choose.
http://www.topica.com/partner/tag01
==^================================================================