Why was ACLD discontinued?
-James Jefferson Jarvis
APRS World, LLC
+1-507-454-2727
(Sent from my phone. My apologies for spelling errors and brevity.)
On Sat, Oct 8, 2022, 12:35 PM Bradley Bassett via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:
> The ACLD was long ago discontinued.
The ACLD was long ago discontinued. The Morningstar relay driver would work
fine. I think Magnum limited the size of the grid tie inverter to 90% of
the Magnum inverter max power. So 3960W for a MS4448PAE.
Brad
On Sat, Oct 8, 2022 at 8:47 AM Jay via RE-wrenches <
re-wrenches@lists.re-wrenches.
Hi Drake
I remembered that they make this product or they did.
https://www.magnum-dimensions.com/sites/default/files/MagDocs/64-00062%20Rev%20A%20%28ACLD-40%29_web.pdf
___
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Hi Drake,
Just to make sure I understand you correctly, I could tie in a new grid tie
inverter on the load side of the Magnum inverter. Then when the grid is up,
the power will be able to backfeed through the MMP175-30D panel to the AC
input (which will get rewired to the grid). And when the grid i
The grid tie inverter can sell through the Magnum relay. When the grid
goes down, it will feed the batteries.
Drake Chamberlin
Athens Electric LLC
Ohio Electrical Contractor's License 44810
CO Master Electrician's License 4526
NABCEP Certified PV Installation Professional
---
On 2022-
Hi All,
I've got someone who wants to tie their off-grid system with a Magnum
inverter (which I think is a 4024 PAE inverter) to the grid. Since the
Magnum inverter cannot be grid tied, I was wondering if there is some kind
of simple grid tie inverter that can be the grid interface, while keeping
Hi William,
Each Powerwall can accept 5 kW of continuous charge and 7 kW peak for 10
seconds. These values increase respectively with additional units (i.e.
10kW continuous for 2 units, 15kW for 3 etc). It’s my understanding that
each unit can accept 7.6 kW of AC coupled PV. If PV is generating mo
Max rating of the Gateway2 is 200A.
Regarding a generator input, you're correct, there's no means that I'm
aware of to integrate a backup generator with the Tesla equipment that
would interact with the solar and storage.
marco
On Thu, Apr 28, 2022 at 5:45 PM William Miller via RE-wrenches <
re-wr
Friends:
I have two questions about AC coupling Tesla systems:
1. Are there limits on how much power can be AC coupled through a Tesla
gateway? Does it depend on the quantity of power-walls connected?
2. I understand a Tesla system does not have a separate generator input
so if a genera
Blue Ion ? made in Hawaii !
Dave Angelini Offgrid Solar
"we go where powerlines don't"
http://members.sti.net/offgridsolar/
e-mail offgridso...@sti.net
text 209 813 0060
> Aloha,
>
>
>
> Other than the Tesla Powerwall, does anyone know of any other AC-coupled
> residential storage products curr
-
From: Marco Mangelsdorf
To: 'RE-wrenches'
Sent: Wednesday, May 23, 2018 5:54 PM
Subject: [RE-wrenches] AC-coupled storage
Aloha,
Other than the Tesla Powerwall, does anyone know of any other AC-coupled
residential storage products currently on the market?
Thanks
Sonnen eco series.
GlennSent from my 'smart' phone so please excuse spelling and typographical
errors.
-- Original message--From: Marco MangelsdorfDate: Wed, May 23, 2018
6:28 PMTo: 'RE-wrenches';Cc: Subject:[RE-wrenches] AC-coupled storage
Aloha,
Other than
Aloha,
Other than the Tesla Powerwall, does anyone know of any other AC-coupled
residential storage products currently on the market?
Thanks,
marco
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
___
Hi Marco; more below.
Dan Fink
Professor of Solar Energy Technology, Ecotech Institute
IREC Certified Instructor™ for:
~ PV Installation Professional
~ Small Wind Installer
Executive Director, Buckville Energy
NABCEP Registered Continuing Education Providers™
970.672.4342
On Sun, Dec 17, 2017 a
Aloha all,
Here in the State of Aloha we’re leading the way as far as being the first PV
peeps to add AC-coupled storage to existing grid-tie NEM systems with the
benefit to the homeowner being having back-up power if/when the grid goes down.
During a grid outage the AC-coupled battery storage
On 8/30/2017 5:54 AM, Drake wrote:
Hi boB,
Would there be any issues with delayed control of the microinverters?
We do plan to use disconnects for maintenance.
Thanks,
Drake
I highly doubt there would be enough delay to worry about anything
regarding battery damage
Even with Rul
Hi boB,
Would there be any issues with delayed control of
the microinverters? We do plan to use disconnects for maintenance.
Thanks,
Drake
At 06:27 PM 8/29/2017, you wrote:
Content-Type: multipart/alternative;
boundary="155C815B9802686293824DDD"
Content-Language: en-US
SSRs
SSRs, especially AC SSRs made from thyrisotrs (scrs and/or triacs) are
"leaky" in general
so when turned OFF, can cause a shock Maybe not enough to kill you
but maybe enough
to make you fall off the roof !
I'm not sure why the disconnects aren't good enough which should already
be i
Probably a good idea to test that HBCO is set right, actually does shut
down the inverter, and stays programmed correctly in a LBCO or complete
drain of battery.
Dave DrakeDave
> The plan is to use N/C relays. As this is in a
> backup system, N/O relays would need to spend
> most of their lives e
The plan is to use N/C relays. As this is in a
backup system, N/O relays would need to spend
most of their lives energized. The relays will
not be able to receive any control power while the grid is up.
If all else fails and the relays stay closed and
overcharge the batteries, the high voltag
My vote would still be to use two single pole relays as suggested
previously to kill each leg. That way you build in redundancy and dropping
either leg will do the trick. In fact, it sounds like this would be even
better than a two pole relay for the redundancy reason.
The other factor is whether
The one-pole relay will work for de-energizing any of the Enphase
microinverters.
Nick Soleil
Field Application Engineer
Enphase Energy
Cell: 707-321-2937
On Aug 28, 2017, at 6:03 PM, Drake
mailto:drake.chamber...@redwoodalliance.org>>
wrote:
Hi Nick,
I should mention that the inverters bein
Hi Nick,
I should mention that the inverters being AC coupled are M-250s, not
the new IQ series. Would that make any difference?
Thanks,
Drake
At 03:12 PM 8/28/2017, Drake wrote:
Hi Nick,
At 11:20 AM 8/28/2017, you wrote:
Content-Language: en-US
Content-Type: multipart/alternative;
Hi Nick,
That is very good news. I just hit the wall trying to find 2 pole
solid state N/C relays. I was trying to decide whether to go back to
mechanical or buy double the amount of single pole relays.
Thanks,
Drake
At 11:20 AM 8/28/2017, you wrote:
Content-Language: en-US
Content-Type:
You can use a one-pole relay. We show one-pole switching in our zero-export,
self-consumption doc for PEL applications.
Nick Soleil
Field Application Engineer
Enphase Energy
Cell: 707-321-2937
On Aug 28, 2017, at 6:44 AM, Drake
mailto:drake.chamber...@redwoodalliance.org>>
wrote:
Hello Wrenc
On 8/28/2017 8:44 AM, Drake wrote:
Alternatively, does anyone know of reasonably priced, 2 pole solid state
relays?
Just use two single pole SSRs. One for each leg. There are two pole SSR,
but the price is not going to be bargain basement.
-James Jefferson Jarvis
APRS World, LLC
+1-507-454-2
Hello Wrenches,
I am going to AC couple some Enphase inverters and found some really
nice solid state, single pole relays to control them with. Enphase
says I must use 2 pole relays for the control current even though the
disconnects will turn off all power for maintenance.
Enphase claims th
Just reading up on Magnum's new AC load diversion controller. It looks
like the best option at this point, it provides AC load diversion so you
can use AC loads not DC resistors, and it communicates with the
inverter, so the system has both 3 stage temp compensated battery
charging, and has 2
Hi Larry;
I'm actually looking at the secondary DC array strategy you mentioned as
well. It's all about those lower charge rates in the absorption and
float stages. The DC array could be sized for a charge rate as low as
C50 and probably have enough current to get the job done.
Meanwhile En
HI Drake,
What sort of multi stage relay control are you using?
jay
peltz power
> On Aug 21, 2015, at 5:27 AM, Drake
> wrote:
>
> I'm considering an AC coupled system with Enphase that would shed inverters a
> group at a time, ending up with one still charging until the set point is
> reac
A question about turning the AC on/off as means of primary on/off control for
this AC coupling question.
Some time ago I was told that most (all?) inverters don’t like having the AC
switched on/off as a means of disconnect.
If I understand correctly this causes the DC internal relay to have to
I'm considering an AC coupled system with Enphase
that would shed inverters a group at a time,
ending up with one still charging until the set point is reached.
At 12:56 AM 8/21/2015, you wrote:
Hi Folks;
I've done more research on the whole AC coupled
issue, and one flaw I found with both t
Ray,
I’m curious about what you mean by not doing a 3 stage charge. While PV
charging in coupled mode (off grid), the battery will reach your absorption set
point. Is this triggering the GT inverters to shut off or does the battery
inverter absorb timer run at all? I would think the absorb time
;T 4G LTE smartphone
Original message From: Ray Walters
Date:08/20/2015 6:56 PM (GMT-10:00)
To: RE-wrenches
Subject: Re: [RE-wrenches] AC Coupled with Generator
Hi Folks;
I've done more research on the whole AC coupled issue, and one flaw I found
with both the Sunny
Hi Folks;
I've done more research on the whole AC coupled issue, and one flaw I
found with both the Sunny Island and the Radian is that they can't
really do a full 3 stage charge for the batteries in off grid mode.
They detect that the batteries are full and disconnect the AC coupled GT
invert
Ray
The Outback does not dump load it drops inverter string (s) instead
Jerry
On Mon, Aug 17, 2015 at 5:26 PM, Ray Walters wrote:
> Yes, we're definitely planning a battery based inverter. The real trouble
> is when the generator is charging, its AC power passes through to the loads
> and hence
Hi Ray,
With that size grid-tied system, you would want to use a battery based
inverter(s) near the (6.7/0.8) 8000W range.
The frequency shift of the Sunny Islands will work with kicking out the
enphase inverters but you wouldn't get the same output ramping that it
would offer if it was a Sunny B
Yes, we're definitely planning a battery based inverter. The real
trouble is when the generator is charging, its AC power passes through
to the loads and hence to the Enphase inverters.
Also I agree with the other poster about Outback being more cost
effective. I just took a look at their Remo
I cant see this working well without some battery based inverter
Jerry
On Aug 17, 2015 10:10 AM, "Ray Walters" wrote:
> HI Esteemed Wrenches:
>
> I am consulting on a system I have never seen, that consists of a 6.7Kw
> Enphase roof mounted system, and 2 backup generators. Each generator has
> a
ASAE
- Original Message -
From: "Ray Walters"
To: "RE-wrenches"
Sent: Monday, August 17, 2015 4:10 PM
Subject: [RE-wrenches] AC Coupled with Generator
HI Esteemed Wrenches:
I am consulting on a system I have never seen, that consists of a 6.7Kw
Enphase roof m
HI Esteemed Wrenches:
I am consulting on a system I have never seen, that consists of a 6.7Kw
Enphase roof mounted system, and 2 backup generators. Each generator
has an automatic 200 amp transfer switch to back up its own 200 amp
panel. Both 200 amp panels are fed by a 400 amp service from
here is the direct link:
http://enphase.com/global/files/Enphase_Application-Note_AC-Coupled-Battery-Based-Systems.pdf
On Thursday, May 29, 2014 10:21am, "Nick Soleil"
said:
Hi Drake,
I'm happy to discuss the ins-and-outs of this with you by phone. My cell phone
is listed bel
Hi Drake,
I'm happy to discuss the ins-and-outs of this with you by phone. My cell
phone is listed below. I have installed AC Coupled systems using Outback
GVFX inverters and a 120-240 transformer. My experience is that this works
fine. We have published a basic document on this, which is prim
Hi Drake,
I have done this, or I think what you are asking.
I have AC coupled 2 enphase 190s through a transformer to a VFX-3525 in an
offgrid situation.
It worked fine.
However I did notice when there were very little loads I got what I think is an
AC ripple.
I would see some lights having I
Hello Wrenches,
We put a system in a year ago with an Outback GVFX 3524 with 2205 W
of PV and a Midnite Solar Classic CC. The system owner would now like
to expand the system by another 6 modules.
Our tentative plan is to AC couple 6 Enphase M-215s powered by 6 REC
255 W modules to the Outb
May 13, 2013 3:16 PM
To: RE-wrenches
Subject: [RE-wrenches] AC coupled ProSine
Has any put together an ac-coupled system using the Xantrex ProSine inverter?
I've got a customer that wants to try this and I don't even know if it is
possible to do with the ProSine. I'd rather not be t
.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Kent Osterberg
Sent: Monday, May 13, 2013 3:16 PM
To: RE-wrenches
Subject: [RE-wrenches] AC coupled ProSine
Has any put together an ac-coupled system using the Xantrex ProSine inverter?
I've got a customer that wants to try
Has any put together an ac-coupled system using the Xantrex ProSine
inverter? I've got a customer that wants to try this and I don't even
know if it is possible to do with the ProSine. I'd rather not be the
first to give it a try.
--
Kent Osterberg
Blue Mountain Solar, Inc.
www.bluemountainsol
-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Drake
Sent: Friday, March 08, 2013 9:40 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] AC Coupled Magnum Issue
Thank you to all who responded to this post.
Larry, that sounds like a great potential
Thank you to all who responded to this post.
Larry, that sounds like a great potential solution. That will put the
frequency shift in line with where the battery cutoff voltage needs
to be. The frequency shift happens 2 volts above the absorption
charge set point. My only issue with the soluti
Solar Power Systems
Sent: Thursday, March 07, 2013 3:36 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] AC Coupled Magnum Issue
ANDyou are still working on that stand-alone, programable,
temperature compensated battery chargerright???
Thank you,
Larry Crutcher
Starlight Solar Power
ANDyou are still working on that stand-alone, programable, temperature
compensated battery chargerright???
Thank you,
Larry Crutcher
Starlight Solar Power Systems
On Mar 7, 2013, at 4:07 PM, Brian Faley wrote:
Hi Allan,
In answer to your question: Yes, we’re developing an AC side 4k
y Inc.
2211 West Casino Rd
Everett, WA 98204
Ph 425-353-8833
www.magnumenergy.com
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Allan
Sindelar
Sent: Thursday, March 07, 2013 2:41 PM
To: RE-wrenches
Cc: Support
Subject: Re: [RE-wre
OK, a bit more:
The line diagram I was referencing was dated 5/1/2010. A later
diagram from a Powerpoint given at last year's NABCEP CE
conference shows a "MagNet" AC diversion controller. It allows AC
diversion loads and three-stage charging. No mention of temp c
Meant to say, "You should tweak #3 & #4 above..."
Drake,
Charging an AGM battery does not have to occur at the maximum charge voltage
allowable; you can charge at a lower voltage for longer periods of time and
still achieve 100% SoC. Since you have grid power to work with, slow down the
charg
Drake,
Magnum's approach does not use disconnecting the AC output from
the GT inverter as a fail-safe method of preventing battery
overcharge. Rather, the Magnum documents I have use a DC diversion
controller and diversion load for this purpose. Their method
Drake,
Charging an AGM battery does not have to occur at the maximum charge voltage
allowable; you can charge at a lower voltage for longer periods of time and
still achieve 100% SoC. Since you have grid power to work with, slow down the
charge cycle.
Assuming you have a late model ME-RC and v
Hello Wrenches,
I had an unexpected glitch in AC coupling a Magnum 4024 PAE
inverter. The system utilizes AGM batteries, which (according to
Concorde tech support) have a very strict upper voltage limit.
The relay used to stop the current input from the direct grid tie
inverter, when batter
PM
Subject: Re: [RE-wrenches] AC Coupled
Larry,
I have run into similar situations. The simplest thing is to wire
the Sunny Boy 6000 into a breaker in a small dedicated box on the
*grid side* of the transfer switch.
Grid present: feeds back normally
Grid absent: interacts with Sunny
Larry,
I have run into similar situations. The simplest thing is to wire the
Sunny Boy 6000 into a breaker in a small dedicated box on the *grid
side* of the transfer switch.
Grid present: feeds back normally
Grid absent: interacts with Sunny Islands
Grid absent, genset on: Sunny Boy cut off
Wrenches,
Here's an update on this configuration (20kW Enphase, AC coupled to
Sunny Islands) you should know about:
Enphase will not support and warranty the use of their micro inverters
in an AC-coupled installation with battery-based inverters. Enphase
approved this verbally with us in d
s?
Best,
August
-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Kelly
Keilwitz, Whidbey Sun & Wind
Sent: Friday, January 14, 2011 9:35 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] AC coupled, grid-tie
wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Kelly
Keilwitz, Whidbey Sun & Wind
Sent: Friday, January 14, 2011 9:35 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] AC coupled, grid-tied Sunny Island - contactor
& bypass
Hi August,
To make sure
sage-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Kelly
Keilwitz, Whidbey Sun & Wind
Sent: Thursday, January 13, 2011 7:33 PM
To: RE Wrenches listserve
Subject: [RE-wrenches] AC coupled, grid-tied Sunny Island -
contact
: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Kelly
Keilwitz, Whidbey Sun & Wind
Sent: Thursday, January 13, 2011 7:33 PM
To: RE Wrenches listserve
Subject: [RE-wrenches] AC coupled, grid-tied Sunny Island - contactor &
bypass
Wre
Wrenches,
We are including 2 Sunny Island inverters into a previously battery-
less grid tied design utilizing 20 kW of PV on Enphase micro inverters
and 2 SMA Windy Boy 6000 inverters (10 kW XZERES 442 turbine). Our
customer wishes to run his fuel generator as little as possible when
the g
Jeff- The Sunny Boys can be reprogrammed into "off grid" mode so they
can work between 56-64 Hz, but I believe you need both a service cable
and a call to SMA tech support to make that happen. They then note in
their system that that inverter's been adjusted to no longer meet UL 1741.
Jeff Yag
Jeff - We have a number of systems with exactly that configuration and we
haven't had any issues. However, we have not installed the XW/SB
combination since Xantrex (Schneider?) rolled out the firmware that
incorporates the high battery frequency shift to shut down the solar
inverter(s). We switc
As mentioned before, many of our clients want battery backup with their solar,
but are not off-grid. They also want a generator so battery banks can be
down-sized. For many of these applications we use a SunnyBoy at the array
when the aray is located hundreds of feet from house, and usually a
ma, CA 94953
Cell: 707-321-2937
Office: 707-789-9537
Fax:707-769-9037
From: Jeff Yago
To: RE-wrenches
Sent: Wed, October 21, 2009 7:53:11 PM
Subject: Re: [RE-wrenches] AC Coupled Re-visited
There have been some good advice related to battery bank sizin
and the
> battery bank is 48 volts 3500 AH
>
> --- On Tue, 10/20/09, Glenn Burt wrote:
>
> > From: Glenn Burt
> > Subject: Re: [RE-wrenches] AC Coupled Re-visited
> > To: "'RE-wrenches'"
> > Date: Tuesday, October 20, 2009, 2:13 PM
>
w
Phil sent you ;-)
I think there is a lot of opportunity to add power reliability and stability
to traditional grid tie systems -- what we need is a way to do it easily and
effectively. Here's to looking for a way!
Phil Undercuffler
Conergy
> -- Forwarded message --
>
Jeff Yago wrote:
There have been some good advice related to battery bank sizing and a better
description of how Sunny Islands work with SunnyBoys, but I am afraid we are
getting away from my original post that started this and that was:
Since a battery based inverter has a battery charging se
There have been some good advice related to battery bank sizing and a better
description of how Sunny Islands work with SunnyBoys, but I am afraid we are
getting away from my original post that started this and that was:
Since a battery based inverter has a battery charging section and all kinds
urt
> Subject: Re: [RE-wrenches] AC Coupled Re-visited
> To: "'RE-wrenches'"
> Date: Tuesday, October 20, 2009, 2:13 PM
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> SMA recently told me that the
> recomme
Phil,
Good advice. Assuming 48V and a large system, what would you use as a
diversion load and controller in this application? As I understand it, this
would be a DC diversion load, such as a wind gennie air heater, that would
be gradual, resistive, and noncritical for occasional use in this rare
t;
>
> -- Forwarded message --
> From: "Walt Ratterman"
> To: , "'RE-wrenches'" <
> re-wrenches@lists.re-wrenches.org>
> Date: Tue, 20 Oct 2009 12:37:04 -0700
> Subject: Re: [RE-wrenches] AC Coupled Re-visited
>
> Glenn
2:14 PM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] AC Coupled Re-visited
SMA recently told me that the recommended Ah of the battery bank is related
to the amount of PV and connected inverters.
They recommended a 500Ah bank with a 5kW PV SB, and a 600Ah bank with a 6kW
PV SB.
100Ah to 1
f Of Mark Frye
Sent: Tuesday, October 20, 2009 2:42 PM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] AC Coupled Re-visited
Thanks Kent. And so I understand more clearly, in the case of 2 SIs as you
describe, each SI has it's own battery bank, and the solar would be split
between
Behalf Of
Jeff Yago
Sent: Tuesday, October 20, 2009 9:52 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] AC Coupled Re-visited
it is my understanding that the Sunny Island coupled with Sunny Boys is
able to taper charge in an AC coupled system as the 2 inverters are able
to communicate with each other
hes.org] On Behalf Of Kent
Osterberg
Sent: Tuesday, October 20, 2009 11:10 AM
To: glenn.b...@glbcc.com; RE-wrenches
Subject: Re: [RE-wrenches] AC Coupled Re-visited
In off-grid mode the Sunny Island uses frequency shift power control to
reduce the output of the Sunny Boy inverters and thereby regulat
:
re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Kirpal
Khalsa
Sent: Tuesday, October 20, 2009 12:05 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] AC Coupled Re-visited
Greetings..it is my understanding that the
Sunny Island
coupl
ts.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Kirpal
Khalsa
Sent: Tuesday, October 20, 2009 12:05 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] AC Coupled Re-visited
Greetings..it is my understanding that the Sunny Island coupled with
Sunny Boys is able to tap
ar.com
_
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Jeff Yago
Sent: Tuesday, October 20, 2009 9:52 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] AC Coupled Re-visited
it is my understanding that the Sunny Island couple
it is my understanding that the Sunny Island coupled with Sunny Boys is able to taper charge in an AC coupled system as the 2 inverters are able to communicate with each other and the Sunny Island alters the frequency input of the Sunny Boys and lowers the total output of the Sunny Boys to match th
Greetings..it is my understanding that the Sunny Island coupled with
Sunny Boys is able to taper charge in an AC coupled system as the 2
inverters are able to communicate with each other and the Sunny Island
alters the frequency input of the Sunny Boys and lowers the total output of
the Sunny B
Hi, All~
On an AC coupled system as Jeff describes, the "battery charge circuitry" on
the battery based inverter is not even participating.
A straight pure sine inverter...with no charger function built in...would
also "charge" the battery if AC coupled to a SunnyBoy with no grid
available. The "
We have completed several totally different AC coupled systems using different inverters, due to large ground mounted arrays that had to be located a great distance from inverter-battery-generator-grid BAS, which are working just fine even with the mis-match of inverter brands. The SunnyBoy seems
I have experienced the same thing with Outback and PVPowered.
DT
--- On Tue, 7/28/09, Mark Dickson wrote:
> From: Mark Dickson
> Subject: Re: [RE-wrenches] AC coupled with grid and backup generator
> To: jry...@netscape.com, "'RE-wrenches'"
> Date:
-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Jeff Yago
Sent: Tuesday, July 28, 2009 6:55 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] AC coupled with grid and backup generator
We are completing a residential 4 kW solar system that is on the
We are completing a residential 4 kW solar system that is on the grid, but has backup battery-powered Xantrex 6 kW inverter, AC coupled Sunny-Boy inverter, and a 17 kW Kohler generator. The larger generator is to allow operation of a ground-source heat pump during winter which is not supplied from
Hi Drake,
Up to now, like you, we've been using the SMA DATA SHEETS
(the glitzy ones with the color graphics) to size our wiring and
breakers. But, those sheets make no mention of a
MAXIMUM OUTPUT FAULT CURRENT.
MAXIMUM OUTPUT FAULT CURRENT is specified only in the very last pages
of the inst
Hi Dick,
Thanks for the suggestion. I will run the concept by the SMA tech
people. I did use the SMA spec sheets in sizing the wiring, but
maybe opening the relays creates fault current at a voltage that will
jump the gap.
Drake
At 10:50 PM 6/4/2009, you wrote:
Hi Drake,
I'm sending you
Hi Drake,
I'm sending you some attachments off list as well.
They are Sunny Boy Specs from the SMA Installation Manuals,
which are more complete than those on the SMA data sheets.
Note, the Maximum Output Fault Current for the 3000 & 4000 is 30 amps,
while Maximum Overcurrent Protection is 30 A
Hi Dick,
There are three inverters, all Sunny Boys, a 3000, 4000 and a
7000. The breakers are QO. The AC conductor sizes are #8 for the
7000, #10 for the 4000 and #12 for the 3000. The breakers are set
for the NEC ratings of the wire (40 A, 30 A and 20 A.).
I sent some information to you
Hi Drake,
Could you please provide more information,
array size, inverter make / model, conductor size,
breaker rating, breaker brand?
Dick
Solarwind Electric
Bradford, VT
--- You wrote:
If I'm following this thread correctly, the
relay is to break the flow of AC current to the
battery ba
Thanks to Christopher Freitas and Kirk who answered my question. Its great to have this resource for a quick answer to problems others have already resolved.
By the way, we have found a great new way to install ground mounted racks. Maybe I am the last to know, but sign companies who do work f
e 03, 2009 11:05 AM
To: jry...@netscape.com; 'RE-wrenches'
Subject: Re: [RE-wrenches] AC coupled relay
I have done it with a SQD 60a, 240 vac
contactor. The coil is 120 vac. It is driven by
a secondary 12vdc relay sending 120 ac to the
coil. The coil of the dc relay is driven by the
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Jeff
Yago
Sent: Wednesday, June 03, 2009 9:35 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] AC coupled relay
What specific supplier, model number, and brand relay have you foun
...@lists.re-wrenches.org] On Behalf Of Jeff Yago
Sent: Wednesday, June 03, 2009 9:35 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] AC coupled relay
What specific supplier, model number, and brand relay have you found to be
perfect to isolate the inverter AC output to the sub-panel of a
battery-based
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