Hedges
I See Electromagnetic Fields!
- Joined
- Mar 28, 2020
- Messages
- 20,795
I'd like to hear from you guys as to your experience with various model SMA Sunny Boy on Sunny Island systems.
I'm not seeing them respond properly to frequency shift in "Backup" (default = UL1741 & backup = On All Phases or On, depending on model and interface.) I'm only getting it to work in "Off-Grid" (default = island or off-grid)
Here's one of SMA's documents on the topic:
https://files.sma.de/dl/7910/SB-OffGrid-TI-US-en-21.pdf
I have SWR 2500U, with a few versions of ROM. One was supposed to respond to RS-485 telling to switch from on-grid to backup, but it always drops off at 60.5 Hz. none of the ROMS have an off-grid option.
I have SB 10000TLUS-12. I can't see it with Sunny Boy Control & RS-485, but I'm able to configure it with Sunny Explorer and Speedwire. I then reinstall RS-485. When set to on-grid (default = UL1741, backup = off) it delivers full power until frequency hits limits (something like +0.5/-0.7 Hz from 60 Hz nominal) then drops off. Set for backup (default = UL1741, backup = on all phases) it stays on line producing full power all the way up to 64.8 Hz, then drops off. When frequency has decreased back to 63 Hz it comes back online, and the cycle repeats. Relays bang on and off loudly about every minute. When set offgrid (default = island), then everything works great. It'll hover just below 62 Hz with power output reduced to match load. With larger loads applied, frequency is reduced by Sunny Island and Sunny Boy delivers more power.
What is your experience? Which models if any perform power reduction in response to frequency when set to "backup"?
I'm not seeing them respond properly to frequency shift in "Backup" (default = UL1741 & backup = On All Phases or On, depending on model and interface.) I'm only getting it to work in "Off-Grid" (default = island or off-grid)
Here's one of SMA's documents on the topic:
https://files.sma.de/dl/7910/SB-OffGrid-TI-US-en-21.pdf
I have SWR 2500U, with a few versions of ROM. One was supposed to respond to RS-485 telling to switch from on-grid to backup, but it always drops off at 60.5 Hz. none of the ROMS have an off-grid option.
I have SB 10000TLUS-12. I can't see it with Sunny Boy Control & RS-485, but I'm able to configure it with Sunny Explorer and Speedwire. I then reinstall RS-485. When set to on-grid (default = UL1741, backup = off) it delivers full power until frequency hits limits (something like +0.5/-0.7 Hz from 60 Hz nominal) then drops off. Set for backup (default = UL1741, backup = on all phases) it stays on line producing full power all the way up to 64.8 Hz, then drops off. When frequency has decreased back to 63 Hz it comes back online, and the cycle repeats. Relays bang on and off loudly about every minute. When set offgrid (default = island), then everything works great. It'll hover just below 62 Hz with power output reduced to match load. With larger loads applied, frequency is reduced by Sunny Island and Sunny Boy delivers more power.
What is your experience? Which models if any perform power reduction in response to frequency when set to "backup"?