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"
<http://members.sti.net/offgridsolar/>https://offgridsolar1.com/
<https://offgridsolar1.com/><http://members.sti.net/offgridsolar/>
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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