Chalk it up as another reason Rapid Shutdown is a bummer.
Bill
Feather River Solar Electric
Bill Battagin, Owner
4291 Nelson St.
Taylorsville, CA 95983
530.284.7849
CA Lic 874049
On 4/28/2022 9:11 AM, Harry Mahon via RE-wrenches wrote:
Dave – Unfortunately the SPS feature is not “back” fully. Choosing
“yes” during commissioning for the SPS feature allows for it to work
(with switch and outlet installed) but ONLY for the same solar day as
an outage occurs.
When the Sunny Boy goes to sleep, the sunspec transmitter will stop
and the array will be in shutdown the next day.
Apologies for any confusion, as this is not the “same” SPS that we
have been talking about since 2013….
Please also note that choosing “yes” for the SPS feature during
commissioning means the DC disconnect must be the Rapid Shutdown
initiator, as the SunSpec signal must be disconnected from the array
when the grid fails to trigger shutdown. If the AC breaker or other
AC disconnect is to be used as the RSI, “no” should be chosen for that
second menu choice after “Sunspec” is chosen for shutdown method on
tab 4 of the Install Assistant.
It is unlikely that this generation of Sunny Boy will improve the SPS
situation, but SMA is working to fully reintroduce the SPS feature
with the next gen Sunny Boy. Stay tuned…
Best regards –
Mike
Michael Mahon
Senior Technical Trainer, Solar Academy
*SMA America*
3925 Atherton Rd
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*From:* RE-wrenches <re-wrenches-boun...@lists.re-wrenches.org> *On
Behalf Of *Dave Tedeyan via RE-wrenches
*Sent:* Wednesday, April 27, 2022 10:08 AM
*To:* RE-wrenches <re-wrenches@lists.re-wrenches.org>
*Cc:* Dave Tedeyan <d...@sungineersolar.com>
*Subject:* [RE-wrenches] SMA Rapid Shutdown and Secure Power Supply
Hi All,
The last SMA-41 inverter I commissioned, had the option for SunSpec
rapid shutdown with Secure Power Supply. I just talked to a level one
tech who was not particularly familiar, but told me that with a
sunspec rapid shutdown device like the JMS-F, you can still use the
Secure Power Supply as if there was no rapid shutdown. I had stopped
installing the SPS on rooftop systems, because if losing grid power
initiates rapid shutdown, then you clearly do not have the power to
run a SPS. But it sounds like maybe the inverter has the smarts to
wake the solar back up once you flip the switch to activate the SPS.
Can anyone here verify this? Have you done this, and does it work as
expected with no extra hardware needed?
Cheers,
Dave
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