Thanks for the response Dave!
The really good news is that my glitch concerns should no longer be an
issue based on Nick Soleil's Nov 11th response on this thread.
Enphase now has a grid profile available that provides frequency based
power curtailment.
I have not yet tried it (project to do so in process), but would
appreciate any feedback from other Esteemed Wrenches about their
experiences so far with the new profile.
Best regards,
Gary Willett PE
Icarus Engineering / Solar Services LLC
Irving TX
On 11/20/17 2:40 PM, Dave Tedeyan wrote:
Gary,
Sorry for the delay. You had asked me about the Enphase/Sonnen solution,
copied below.
Since this is a grid tied battery backup situation, the only brute OFF
situations would be in a grid outage. Once the batteries are charged, the
Sonnen continues
to sell extra
PV to the grid. And in the case of a power outage, the Sonnen is actually a
little slow in
transitioning. It takes around 10 seconds (if I remember correctly) for the
Sonnen to start
powering the backed up loads. So no matter what you have for the AC coupled
PV, you
will have a small gap in power during an outage.
I hope this answered your question... If not, I'll try to respond quicker
next time.
Cheers,
Dave
DAVE:
How does the brute force OFF transitions of the 8K of Enphase AC-coupled
micro-inverters affect the AC loads being served by the Sonnen? Are
there any noticeable/measurable glitches in the Sonnen's distributed AC?
I am assuming the Enphase ON transitions are more graceful because of
the UL1741 prove-in period and the individual ramp-up of the individual
microinverters.
Regards,
Gary Willett PE
Icarus Engineering & Solar Services LLC
*--*
*Dave Tedeyan*
*Project Engineer*
*Taitem Engineering, PC*
10 Verizon Lane, Lansing, NY 14882
Voice: (607) 930-3481 x6
www.taitem.com
On Mon, Nov 13, 2017 at 10:52 AM, Drake <
[email protected]> wrote:
Hi Nick,
Please send me your information. Currently I am finishing up an Enphase
M-250, AC coupled system that is designed to taper charge batteries by
dropping out groups of inverters based on battery voltage.
Thanks,
Drake
Drake Chamberlin
Athens Electric LLC
OH License 44810
CO License 3773
NABCEP Certified Solar PV
740-448-7328
At 11:58 PM 11/11/2017, you wrote:
Hi Wrenches,
We now have the ability to provide frequency based power curtailment. If
you are AC Coupling with a battery-based inverter that can fluctuate
frequency to regulate charge on the battery, then we can ramp our output up
and down to regulate the charge more evenly.
If you have an AC Coupled system using Enphase microinverters, reach out
to me and I will set your company up with a grid profile that can provide
this option. Once your company has been granted access to this profile,
you can update the profile using either our Installer Toolkit (ITK) app or
Enlighten.
Cordially,
Nick Soleil
Enphase Energy | Product Manager, Envoy and IQ Accessories
(707) 763-4784 x7267 // office
(707) 321-2937 // cell
[Enphase_esig_logo6.jpg]<https://enphase.com/>
Energy Evolved<http://enphase.com>™
Powering What’s Next™ | The Enphase Energy Management System<
http://ow.ly/HbVS3>
NABCEP Certified Solar PV Installer #03262011-300
California C10 Licensed Electrician #986315
Texas Master Electrician #284451
________________________________
From: RE-wrenches <[email protected]> on behalf
of Gary Willett <[email protected]>
Sent: Saturday, November 11, 2017 3:34 PM
To: [email protected]
Subject: Re: [RE-wrenches] Battery Backup for Older Enphase Systems
DAVE:
How does the brute force OFF transitions of the 8K of Enphase AC-coupled
micro-inverters affect the AC loads being served by the Sonnen? Are
there any noticeable/measurable glitches in the Sonnen's distributed AC?
I am assuming the Enphase ON transitions are more graceful because of
the UL1741 prove-in period and the individual ramp-up of the individual
microinverters.
Regards,
Gary Willett PE
Icarus Engineering & Solar Services LLC
On 11/9/17 2:28 PM, Dave Tedeyan wrote:
You could go with a Sonnen. That is meant to be AC coupled, and its a
very
simple install.
Nice piece of equipment, but its expensive. We just installed one that
has
right around 8kw of Enphase M215 inverter output. So far, no issues.
Cheers,
Dave
*--*
*Dave Tedeyan*
*Project Engineer*
*Taitem Engineering, PC*
10 Verizon Lane, Lansing, NY 14882
Voice: (607) 930-3481 x6
www.taitem.com<http://www.taitem.com>
On Thu, Nov 9, 2017 at 2:07 PM, John <[email protected]> wrote:
We did one a few months ago using Outback VFX3024e, 1000 a/h battery
bank
- basically an Off-Grid system but tied into the switchboard, with
customer
nominated circuits dedicated to the Off-Grid system. The grid is
acting
like the backup generator via a relay.
The only little hiccup was that when the *generator* was called on, the
Off-Grid system had to sync in with the real Grid, it was not
immediate.
Apart from that - seems to work O.K. John,
GoSolar
Ltd, Christchurch, N.Z.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
++++++++++++++++++++++++++++++++++++++++++++++++
-----Original Message-----
From: RE-wrenches [mailto:[email protected]]
On
Behalf Of Matt Sherald
Sent: Friday, 10 November 2017 3:43 a.m.
To: RE-wrenches
Subject: [RE-wrenches] Battery Backup for Older Enphase Systems
I'd appreciate some ideas as to what backup system designs work well
with
the older Enhase equipment (M250/215 era).
I've tried this at home with a XW4024, but the frequency rise causes
the
lights to flicker and it is awfully unpleasant.
A customer of mine has asked about backup to go with an array that uses
M250s and this prompted me to write.
Thanks in advance!
-Matt
--
Matt Sherald
PIMBY Energy, LLC
NABCEP Certified Solar PV Installer®
304-704-5943
www.getpimby.blogspot.com<http://www.getpimby.blogspot.com>
www.getpimby.com<http://www.getpimby.com>
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