thanks David, Well spoken (I would add the words after ", you have many
strings of 3 modules in series" the words (connected in parallel)"
I have found one other tigo trick, If you are supplying an inverter with a
short string, and some modules or even one module is shaded the inverter can
drop out of MPPT range of the modules greatly reducing the power of the string.
So you have to do string sizing with reduced voltage from the Tigo's in mind.
Darryl,
BTW I am out of hospital after 90 days looking forward to full recovery by
spring, Hi everyone, I seem to have made it.
________________________________
From: David Katz <dk...@aeesolar.com>
To: RE-wrenches <re-wrenches@lists.re-wrenches.org>
Sent: Wednesday, October 17, 2012 11:34 AM
Subject: Re: [RE-wrenches] Tigo Tech Support Response
Larry and Dan,
Jacob’s response is a bit misleading. Tigo Maximizers operate in the buck mode,
by lowering the voltage of a shaded module and increasing the current to match
other modules in a string, so the unshaded modules are not affected. If you
use Maximizers in an off grid situation, you must still have enough voltage to
charge the battery. If you are using a typical 150 vdc input charge controller
with 3 modules in series, you could still charge the battery on the voltage of
2-1/2 modules in series. More typically in an off grid system, you have many
strings of 3 modules in series. If one has a lower voltage because of
Maximizer operation, it will be ignored by the charge controller which will be
tracking the full voltage strings.
If you want to use Maximixers in an off grid situation, I suggest using them
with a Xantrex 600 vdc charge controller and one or two strings of modules.
David Katz
CTO & Founder
AEE Solar Inc
P: 707 825-1200
F: 707 825-1202
dk...@aeesolar.com
www.aeesolar.com
DISCLAIMER:
This communication, along with any documents, files or attachments, is intended
for the use of only the addressee and contains privileged and confidential
information. If you are not the intended recipient, you are hereby notified
that any dissemination, distribution or copying of any information contained in
or attached to this communication is strictly prohibited. If you have received
this message in error, please notify the sender immediately by e-mail reply and
destroy the original communication and its attachments without reading,
printing or saving in any manner.
From:re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Larry Crutcher,
Starlight Solar Power Systems
Sent: Wednesday, October 17, 2012 7:16 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] Tigo Tech Support Response
Dan,
Thanks for posting this. I am fascinated and puzzled with their response. Why
would they not advertise this point? I see nothing on their site that suggests
the Module Maximizer functions with off-grid PV systems. Many battery based
systems that we have installed over the years certainly could benefit from
their technology and the monitoring.
Has anyone ever used the Tigo Maximizers with a battery based system?
Larry Crutcher
Starlight Solar Power Systems
On Oct 16, 2012, at 5:25 PM, <d...@foxfire-energy.com>
<d...@foxfire-energy.com> wrote:
Hi Guys, following is the response from Tigo on the question of using their
optimizers for battery charging:
Hello Dan
Thank you for the phone call yesterday. I have answers to some of your
questions.
- At the moment, we only sell arc fault detection services to combiner box
manufacturers to incorporate into their combiner boxes. However, in a short
amount of time (estimates say about a month), we will offer string level arc
fault detection.
- The maximizers will work just fine with batteries/charge controllers ONLY if
the battery/charge controller has an MPPT input. There are those out there that
do not have this type of input, so be sure to purchase accordingly.
- We do offer module level monitoring.
Thanks and let me know if you have any other questions!
---------------------------------
Regards,
Jacob Jackson
Tech Support Engineer
Tigo Energy
db
Dan Brown
Foxfire Energy Corp.
Renewable Energy Systems
(802)-483-2564
www.Foxfire-Energy.com
NABCEP #092907-44
_______________________________________________
List sponsored by Home Power magazine
List Address: RE-wrenches@lists.re-wrenches.org
Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
Check out participant bios:
www.members.re-wrenches.org
_______________________________________________
List sponsored by Home Power magazine
List Address: RE-wrenches@lists.re-wrenches.org
Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
Check out participant bios:
www.members.re-wrenches.org
_______________________________________________
List sponsored by Home Power magazine
List Address: RE-wrenches@lists.re-wrenches.org
Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
Check out participant bios:
www.members.re-wrenches.org
