[RE-wrenches] Fortress Shutdown?
Ray Walters
ray at solarray.com
Tue Aug 27 15:23:25 PDT 2024
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 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
>
>
>
>
>
>
>
>> 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 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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