Agree Will and adding that for generator users closed loop will save 25%
or more on fuel.
I know alot of you folks do not use Schneider but it is so easy to close
loop for offgrid. You just plug Xanbus into one battery and the whole
group gets closed loop charged and discharged by XW and its chargers. It
is the only Battery that does this with Schneider xanbus.
No data to enter! Ever! Been using this since just after the 48 V LG
failed beta testing with Schneider in 2017.
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 2023-02-10 5:15 am, White, Will via RE-wrenches wrote:
Ray,
I can't speak to the Fortress product, but Discover will do what they
call "dynamic charging" in closed-loop installations. Basically, the
BMS will tell the power electronics how to charge the battery, which
will lead to a better charging cycle. For example, if the batteries are
discharged, and their cell temperature is low, the BMS will push the
charging voltage above what the recommended setting would be in an open
loop setup.
I saw David Norman give a presentation about this topic at the NABCEP
conference last year. It was very insightful.
Here's a short article about it:
https://blog.discoverbattery.com/benefits-of-closed-loop-charging-with-lynk
[1]
Thanks,
Will
From: RE-wrenches <re-wrenches-boun...@lists.re-wrenches.org> On Behalf
Of Ray Walters via RE-wrenches
Sent: Thursday, February 9, 2023 5:35 PM
To: re-wrenches@lists.re-wrenches.org
Cc: Ray Walters <r...@solarray.com>
Subject: [EXTERNAL] [RE-wrenches] Solark-Fortress Com? (was Fortress
Battery Heater)
CAUTION: This email originated from outside of the organization. Do not
click links or open attachments unless you recognize the sender and
know the content is safe.
Hi Chris;
That's not for the eVault. Other Wrenches have mentioned using a pet
heating pad with a 120 vac plug in thermostat. I'm going to try that,
I'll report back to the list what I find.
Secondly, I am having issues figuring out how to do the closed loop
coms. The Fortress instructions contradict themselves on how to even
make up the proper CANbus cable, as apparently MODbus is not stable
anymore, after the latest Solark firmware upgrades. I'm about to just
apply the KISSbus, which is to blow off the closed loop com all
together, and _K__eep It Simple S#@$%_!, otherwise known as No Coms at
all.
I've screwed with Com stuff since the 90s, but usually been
disappointed, to downright horrified with the final results. Somebody
explain to me like a 2 year old again, why closed loop is so much
better? Think off grid, where reliability is 10 times more important
than squeezing an extra 5% capacity out of the battery.... Notes in the
online instructions such as "_Failure to properly upgrade the firmware
may cause the battery to stop working!", _ are not making we want to
push ahead with closed loop either.
Ray
On 2/9/2023 11:01 AM, Chris Schaefer via RE-wrenches wrote:
Ray,
I'd suggest reaching out to the Fortress techie's as they just
introduced a heater product for their enclosure products. While I don't
believe they have a unit specif to the eVault but you should be able to
make it work.
Christopher
On Wed, Feb 8, 2023 at 6:43 PM Jerry Shafer via RE-wrenches
<re-wrenches@lists.re-wrenches.org> wrote:
Pet heater have worked for me, I air gap a sealed heater box under the
battery, thermostat inside the top of the battery. It's slow and low
power but does the trick
Fun times
On Wed, Feb 8, 2023, 3:05 PM Ray Walters via RE-wrenches
<re-wrenches@lists.re-wrenches.org> wrote:
Hi All;
I have a fresh Fortress Evault installation with a Solark inverter.
The
batteries are indoors in the center of the house, but the customer is
not there full time, so the battery is unfortunately going below
freezing. What are the best options for setting up a heating system
for
the E Vault?
Here are ideas that I have not tried, but am considering:
1) add a 240 v, 1000 w baseboard heater in the room near the battery
that is wired to only run off the generator. Run the generator until
the heat comes up, and then hopefully after 30 minutes, the battery
would begin accepting a charge.
2) Add an 120 vac heating blanket under the evault that would be wired
to a thermostat, but also have a relay control from the PV system, so
that the heater would only operate when the sun was out, and the
battery
was below 50F. I don't quite know how to set this up with the
Solark's
load controls.
I've considered some DC options, but they don't make much sense, since
the inverter has to be on to charge from PV anyway.
The long term plan is for the client to finish the insulation, and
sheet
rock, and add a gas wall heater in there as needed.
Thanks,
Ray Walters
Remote Solar
in the Colorado mountain cold.....
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[1]
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