[RE-wrenches] Fortress Shutdown?

[Jerry Shafer]

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 at 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
>
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>
> On Aug 27, 2024, at 2:51 PM, Ray Walters via RE-wrenches <
> re-wrenches at 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  offgridsolar at sti.net <offgridsolar at 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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