Thanks Brad,
I think I am finally getting it.
When on-grid, the grid is providing wave form and transistors in BB are
available to provide voltage regulation.
When off-grid, the transistors in the BB are required to provided wave
form and not available to provide regulation.
On 11/4/2019
Mark,
The difference is that when AC coupled the power is coming backwards into
the AC out. When it's charging from the grid or generator it is charging
from the AC inputs. The inverter can control the charge from the inputs but
not what is coming in reverse into the output.
Brad
On Sun, Nov 3,
OK Jay that makes sense.
This must mean that there is a significant difference in the function of
the BB inverter when it is in off-grid mode vs when it is in grid
connected mode.
On 11/3/2019 5:45 PM, jay wrote:
No, older non frequency shift BB inverters don’t communicate that way.
They ha
No, older non frequency shift BB inverters don’t communicate that way.
They have no communication with a Rule 21 GT inverter.
The BB, it will just keep charging and charging with any extra energy coming
from the GT inverter. The BB has no regulation, there is no absorb or float,
just charge.
OK, I am hearing this over and over and I just want to confirm that is
true even if the BB is older and does not have "NEW Frequency Shifting
AC Coupling".
On 11/3/2019 4:26 PM, Dave Angelini Offgrid Solar wrote:
The BB inverter will drive the grid inverter off frequency because it is
full/flo
The BB inverter will drive the grid inverter off frequency because it is
full/floating and the grid tie will stop producing power. This is how AC
coupling works but if something goes wrong, like programming gets corrupted
by surges or the battery hits an LBCO or HBCO AC power will stop. Or if
this
Folks,
Please allow me to ask another question:
Suppose I have a bi-direction inverter/charge with no connection to the
grid.
I have GT inverter ac coupled and producing 2000w. The battery is in
float, and I have 2000w of load connected. All is well.
Now suppose I remove the loads without
of Mark
Frye <mailto:ma...@berkeleysolar.com>
*Sent:* Sunday, November 3, 2019 11:00 AM
*To:* re-wrenches@lists.re-wrenches.org
<mailto:re-wrenches@lists.re-wrenches.org>
<mailto:re-wrenches@lists.re-wrenches.org>
*Subject:* Re: [RE-wrenches] Parts List For AC Couple Disconnect
OK
An option that will work for sure is a diversion load and controller.
This can be done with most standard CC’s and or inverters using the AUX relay
driving another SS relay, and then the diversion load. The load can be a
standard AC oil heater, safe, inexpensive, reliable. ( this is what I u
field Solar*
*maxfieldso...@hotmail.com* <mailto:maxfieldso...@hotmail.com>
*
**(801) 631-5584 (Cell)**
*
*From:* RE-wrenches on
behalf of Mark Frye
*Sent:* Sunday, November 3, 2019 11:00 AM
*To:* re-wrenches@lists.re-
riginal message--From: Mark FryeDate:
Sun, Nov 3, 2019 1:58 PMTo: re-wrenches@lists.re-wrenches.org;Cc: Subject:Re:
[RE-wrenches] Parts List For AC Couple Disconnect
OK, the posts are coming in on the "no" side, but with
uncertainty about how any given BB inverter might work.
t;mailto:maxfieldso...@hotmail.com>
(801) 631-5584 (Cell)
From: RE-wrenches
<mailto:re-wrenches-boun...@lists.re-wrenches.org>
on behalf of Mark Frye
<mailto:ma...@berkeleysolar.com>
Sent: Sunday, November 3, 2019 11:00 AM
To: re-wrenches@lists.re-wren
r*
*maxfieldso...@hotmail.com* <mailto:maxfieldso...@hotmail.com>
*
**(801) 631-5584 (Cell)**
*
*From:* RE-wrenches on
behalf of Mark Frye
*Sent:* Sunday, November 3, 2019 11:00 AM
*To:* re-wrenches@lists.re-wrenches.org
*Subject:* Re: [RE-wrenches] Parts List For AC Couple Disconnect
OK Brian,
...@hotmail.com<mailto:maxfieldso...@hotmail.com>
(801) 631-5584 (Cell)
From: RE-wrenches on behalf of Mark
Frye
Sent: Sunday, November 3, 2019 11:00 AM
To: re-wrenches@lists.re-wrenches.org
Subject: Re: [RE-wrenches] Parts List For AC Couple Disconnect
OK Brian,
So I think you are confirm
-5600
www.millersolar.com
CA Lic. 773985
-Original Message-
From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On
Behalf Of Mark Frye
Sent: Sunday, November 3, 2019 9:39 AM
To: re-wrenches@lists.re-wrenches.org
Subject: Re: [RE-wrenches] Parts List For AC Couple
Marc, High or low battery cut-out on a battery based inverter is lights
out. There is usually a warning period that becomes a fault. I still think
this is crazy for offgrid unless it is a very large system 20+KW of battery
inverters in a microgrid type mindset with onsight knowledgeable people.
Als
More like “could work let us know how it goes!”
Brian
> On Nov 3, 2019, at 10:01 AM, Mark Frye wrote:
>
> OK Brian,
>
> So I think you are confirming that monitoring AC side voltage is an
> acceptable way of deciding when to disconnect the GT inverters.
>
> With my parts list, I have a dela
Hey now I didn’t say that!
Brian
> On Nov 3, 2019, at 10:01 AM, Mark Frye wrote:
>
> OK Brian,
>
> So I think you are confirming that monitoring AC side voltage is an
> acceptable way of deciding when to disconnect the GT inverters.
>
> With my parts list, I have a delay time that would hol
OK Brian,
So I think you are confirming that monitoring AC side voltage is an
acceptable way of deciding when to disconnect the GT inverters.
With my parts list, I have a delay time that would hold the GT inverters
off-line for some period of time (I would probably set to 1 hour) before
comi
With frequency-on/off, frequency power control, or other “inverter integrated”
control based on battery voltage/state of charge there is also control in
regards to when the ac coupled inverters come back on. And yes, this is
definitely needed to prevent overcharge (or get three-stage charging fr
Hi William,
Thanks, you bring up issues that are important to me here.
In particular, my situation is that the GT inverter is inter-tied a
couple sub panels upstream of where I want to put the BB inverter. The
distance is long, so I am looking for a solution where I don't have to
run a cable
can Rube Goldberg as much as I want.
William
*From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On
Behalf Of *Mark Frye
*Sent:* Saturday, November 2, 2019 7:32 PM
*To:* re-wrenches@lists.re-wrenches.org
*Subject:* Re: [RE-wrenches] Parts List For AC Couple Disconnect
ct:*[RE-wrenches] Parts List For AC Couple Disconnect
Folks,
Can anyone share a parts list for setting up a AC couple disconnect?
I want to couple a
non-frequency response grid-tied inverter to a
battery based stand-alone inverter.
I have only 8 amps output from the GT inverters, so can use 10
Sounds like a job for an Arduino...-GlennSent from my 'smart'phone, so please
excuse typos and spelling errors.-- Original message--From: Mark
FryeDate: Sat, Nov 2, 2019 1:05 PMTo: re-wrenches@lists.re-wrenches.org;Cc:
Subject:[RE-wrenches] Parts List For AC Couple DisconnectFolks,
Can
Folks,
Can anyone share a parts list for setting up a AC couple disconnect?
I want to couple a non-frequency response grid-tied inverter to a
battery based stand-alone inverter.
I have only 8 amps output from the GT inverters, so can use 10A relay
contacts.
I want a device to monitor AC vo
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