Hello Wrenches, We have commissioned a new SI system (240V single phase residential) and want to ensure testing is adequate to ensure the system will perform as desired.
The system consists of two SI5048s, 5kW PV array, SB5000US, battery bank, transfer switch, backup generator, and supplemental digital relay to activate DigIn signal on Grid DOWN condition. I am sure there are many test scenarios to run through to qualify the system. Here is one. Test Case 1 1. Verify SOC is 95%+ 2. Modify GnSocTm1Str and GnSocTm1Stp to artificially high numbers (85% and 90% respectively) 3. Power off SB5000US to eliminate charging from solar 4. Simulate Grid Outage 5. Verify Transfer switch moves to generator input position 6. Verify DigIn signal to SI5048 reflects grid state (grid is down) 7. Monitor SOC and verify that when SOC reaches GnSocTm1Str (85%) the SI starts the generator 8. Monitor SOC and verify that when SOC reaches GnSocTm1Stp (95%) the SI stops the generator 9. Power ON the SB5000US 10. Reset GnSocTm1Str and GnSocTm1Stp to system specific values. 11. End Test Another test would be to bring the grid back up after step 7 or after step 8 and verify correct behavior. I would love to hear from those who have commissioned similar SI configurations, about other scenarios we should be testing to adequately qualify the system. Carl Adams SunRock Solar NABCEP Certified PV Installer
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