Just curious what high SoC is? I set mine for 95% or so and do not
worry about the last few %.
Have not seen this problem but do not use fortress. Should not have shut
downs offgrid except LBCO or lightning.
I really think that an SPD should be on the battery as well as AC in and
out these days,
especially with a 48V BMS. Tempting the demons!
Dave Angelini Offgrid Solar
"we go where powerlines don't"
[1]https://offgridsolar1.com/ [2] [1]
e-mail offgridso...@sti.net
text 209 813 0060
On 2024-08-27 4:19 pm, Maverick Brown via RE-wrenches wrote:
Ray
I think you are on to something.
I have multiple eVault MAX batteries on a Radian and I have had
mysterious random shutdowns with high SOC before.
Could be they were off grid at the time or had a big load shut off
causing a voltage bounce.
The batteries are comm'd together but not to the Radian, of course.
If that is the case, I wonder if there is a newer battery firmware that
can over come this or in fact why a LiFePO4 can't go over 55.2 when
most have a 58.4V limit.
Thank you,
Maverick
Maverick Brown
Off-Grid Solar Commander since 2006
Maverick Solar Enterprises, Inc.
* Solar Commander Remote Power
* SunFlow Systems Cathodic Protection
maver...@mavericksolar.com
512-460-9825
On Aug 27, 2024, at 5:24 PM, Ray Walters via RE-wrenches
<re-wrenches@lists.re-wrenches.org> wrote:
Is it possible that a load shut off, and then the controllers over shot
the voltage long enough to shut the BMS off? If so, what's the
solution? Lower absorb voltages? I checked voltage calibration between
the various pieces of equipment.
Ray
On 8/27/2024 4:14 PM, Jerry Shafer via RE-wrenches wrote:
High voltage disconnect would do this, is the site monitored
Fun times
On Tue, Aug 27, 2024, 2:47 PM jay via RE-wrenches
<re-wrenches@lists.re-wrenches.org> wrote:
I have a buddy in tech support at Fortress.
I asked him and he said that elevated absorb volts above 55.2 could
cause this situation.
And then the power cycle would reboot the BMS.
I am presuming its open loop, and the fact you mentioned that there was
more PV and then the shut down sure might be connected.
You might check the charge voltages/time to make sure they are correct
and I can't remember if the classic has battery sense wire connections.
jay
On Aug 27, 2024, at 2:51 PM, Ray Walters via RE-wrenches
<re-wrenches@lists.re-wrenches.org> wrote:
The SPD was on one of the PV inputs before it came into the house.
There were two Classics, each fed with its own PV input and SPD. It
actually caused an underground splice to fail (high resistance) which I
replaced the splice and restored full voltage, and both Classics were
working fine. Just seems unlikely ( but not impossible) that the surge
would make it past the Classic without damage, but then damage the
Fortress BMS in an otherwise imperceptible manner. That is our
current best theory at the moment though. I added an SPD on the 48 v
buss, before this latest total shutdown.
Ray Walters
On 8/27/2024 2:35 PM, Dave Angelini Offgrid Solar via RE-wrenches
wrote:
When I have had someone lose an SPD (I assume it was on DC buss) there
is often latent damage (shows up later) to many of the devices. In a
Hi Rel mode, it is recommended to replace it all. Most offgrid is not
that critical but try telling that to someone with rotten food.
The freezers and reefers are often full of spoils that smells never go
away. YUK !
Dave Angelini Offgrid Solar
"we go where powerlines don't"
[1]https://offgridsolar1.com/ [2] [1]
e-mail offgridso...@sti.net
text 209 813 0060
On 2024-08-27 1:02 pm, Ray Walters via RE-wrenches wrote:
Greetings All;
I have Fortress Battery installation with a pair of E Vault batteries
set up in a Master/ Slave arrangement. Its been working fine for over
a year, but the customer just had a complete shutdown of the batteries
which left multiple freezers, and refrigerator with rotting food.
When he rebooted the batteries by turning on/off the main breaker on
each, they both come up and showed 100% SOC on the Master, and 98% on
the other. There were no fault codes. I just recently installed a
larger PV array, and so the system has been reaching full charge every
morning.
I have multiple calls in to Fortress, but not hearing anything back
from them at all. We did have a lightning surge event a few months
ago, that damaged a Midnite SPD (first ever for me), and took out the
control board on the generator. One VFX inverter has an LED out, but
we only use two inverters of the Quad stack, so I just switched to
another inverter. All other equipment appeared fine: Midnite
controllers, rest of the Outback VFX quad stack, and never any issues
seen with the Fortress batteries.
The other odd thing, is since he rebooted the batteries, the system is
working fine, and recharging to 100% by 9:30 am as before. Is it
possible the Fortress BMS were damaged and are now having an
intermittent shutdown issue? I did ask him to temporarily disconnect
the comms between batteries, in case it is a bad BMS on one, it will
isolate it from the other.
This is a tough one to figure out, since it hasn't happened again, and
there are no fault codes. The Mate 3 shows a low frequency AC code,
but that's usually just from the generator shutting down. Any help,
ideas, experiences, would be greatly appreciated.
Thanks,
Ray Walters
Remote Solar
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