Sezibwa meter replacement log

Sezibwa meter replacement log 
 One entry per customer meter swap at Sezibwa (gateway gw-pi2). Record every system that points at a meter serial, because each one must be switched separately: the OpenEMS gateway config, the customer app ( meter_sources ) and the billing engine (MBE device + household link). Customers are identified here by Modbus address and serial only. 
 Summary 
 
 
 
 Date 
 Modbus address 
 Old serial 
 New serial 
 Status 
 
 
 
 
 2026-09-14 
 7 
 210302003356 
 200326020197 
 All systems switched 2026-09-24; closing 244.54 kWh, opening 0.31 kWh 
 
 
 
 2026-09-14: address 7, 210302003356 to 200326020197 
 Why it was replaced. The old meter stopped answering on the meters bus on 2026-08-29 at 23:07 UTC (logger issue #82). It was later found physically absent. Its last register value seen on the backend was 229.35 kWh on 2026-09-04. 
 New meter. CHINT DDSU666 serial 200326020197, on Modbus address 7. The first backend data is from 2026-09-14; the register read 16.16 kWh on 2026-09-24. 
 Systems switched: 
 
 
 
 System 
 Change 
 Date 
 Reference 
 
 
 
 
 OpenEMS gateway (gw-pi2) 
 New meter component meter200326020197 on unit 7 
 2026-09-14 
 microgrid-gateway PR #68 
 
 
 Customer app 
 meter_sources row repointed to meter200326020197/ActiveConsumptionEnergy , history start 2026-09-14; daily usage backfilled 14 to 24 Sep with the production backfill script (11 days, sums match the register) 
 2026-09-24 
 this page 
 
 
 Billing engine (MBE) 
 New device "(new meter)" added on edge sezibwa-rentals-gw-pi2 as a Consumption meter 
 2026-09-24 
 this page 
 
 
 Billing engine (MBE) 
 Household billing device changed to the new device (Change billing device); old device now unlinked; invoice meter serial field set to 200326020197 by hand 
 2026-09-24 
 MBE UI gap reported: serial does not follow a device change 
 
 
 
 Closing and opening readings (from the swap thread, Element product room, 2026-09-14). Old meter 210302003356 read 244.54 kWh just before removal. New meter 200326020197 read 0.31 kWh at installation (about 12:15 EAT), on Modbus address 19. The old meter's register kept counting while it was off the bus, so there is no unmetered gap: its closing reading covers 30 Aug to 14 Sep. 
 September bill. The billing engine takes one meter per household per period, so bill this customer with one manual reading ( manualReadings in the generate call) that joins the two meters: 
 
 
 
 
 Start 
 End 
 kWh 
 
 
 
 
 Old meter 
 223.52 (August end, when it went silent) 
 244.54 
 21.02 
 
 
 New meter 
 0.31 
 reading at September close 
 end minus 0.31 
 
 
 Manual reading to enter 
 223.52 
 244.54 + (new end - 0.31) 
 sum of both 
 
 
 
 Check first that the August bill really ended this customer at 223.52 kWh. 
 Watch. A stray 0.35 kWh value appears on 2026-09-14 under the old channel name. That was the new meter answering on address 7 before its component was renamed, not the old meter.