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 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.
jay
peltz power
On Nov 3, 2019, at 4:31 PM, Mark Frye <ma...@berkeleysolar.com> wrote:
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/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 is being controlled by Soc and it gets wrong data or there is a
network issue, or all of the other things that can happen that I have not
thought of.
Why do you not want to build a normal DC couples system? I forget
fast....Happy Hour!
Dave Angelini Offgrid Solar
"we go where powerlines don't"
http://members.sti.net/offgridsolar/
e-mail offgridso...@sti.net
text 209 813 0060
On Sun, 3 Nov 2019 16:17:39 -0800, Mark Frye <ma...@berkeleysolar.com>
wrote:
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 disconnecting the GT inverters.
The word is that something bad happens now. I would like to understand
what that bad thing is.
I have one explanation that I think says that the GTs will continue to
produce the 2000w, and that energy will go into the batteries in an
unregulated fashion. When does this end, when the batteries blow up? Is
that the consequence of not disconnecting the GT?
With many thanks in advance for your help in understanding.
Mark
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