NFE Daily Brief (gw-pi2, Sezibwa)

NFE daily brief

Written each morning by Claude Haiku from the day's data. Newest first, last 30 days.

2026-11-09

Sezibwa battery, 9 Nov 2026

• Arbitrage window (18:00-23:59): Battery fell from 78% to 11%, discharging 7.1 kWh. No data was received for 156 of 360 minutes, so these window figures are estimates.
• Arbitrage gain: Loss of 120 UGX today (8.61 kWh discharged). Month to date: 3,149 UGX. Since 26 Sep: 26,528 UGX.
• Battery-served energy: 8.61 kWh today (arbitrage only; 0.0 kWh outage backup, worth 0 UGX). Backup month to date: 14.9 kWh. Backup since 26 Sep: 96.1 kWh.
• Grid outages: None. Backup from outage list: 0.0 kWh.
• Night charge: Battery rose from 11% at 00:00 to 40% at 01:00 EAT, grid present (233 V). Planner advised 56%.
• 17:00 battery level: 87.6%, which met the 75% rule.
• Evening L3 voltage: Minimum 195.6 V, with 88 minutes below 207 V.
• Modbus errors: Not available. All 10 meters reporting.

Needs attention: nothing.

2026-11-08

Daily brief, 8 Nov 2026

Arbitrage: Battery went from 47.8% to 11.0%, discharging 3.68 kWh.

Arbitrage gain: Loss of 100 UGX today on 9.49 kWh discharged. Month to date: gain of 3,269 UGX. Since 26 Sep: gain of 26,648 UGX.

Battery-served energy: 10.31 kWh today (9.49 arbitrage, 0.82 backup), with backup worth 639 UGX. Backup month to date: 14.9 kWh. Since 26 Sep: 96.1 kWh.

Grid outage: 00:25 to 01:39 EAT, 74 minutes. Battery 29% at start, 21% lowest and at end. Supplied 0.81 kWh (from outage list).

Evening L3: Minimum 193.0 V, below 207 V for 224 minutes. Modbus errors: not available.

Night charge: 11% to 40%, grid on (minimum 236 V). Planner target 56%, actual 40%.

17:00 battery: 57.8%, missed the 75% night-cap rule.

Needs attention: 17:00 battery at 57.8%, below the 75% night-cap rule.

2026-11-07

Arbitrage window: battery 73.4% down to 11.0%, 7.51 kWh discharged.

Arbitrage gain: 273 UGX today (5.71 kWh); month to date 3,369 UGX; since 26 Sep 26,748 UGX.

Battery-served energy: 10.21 kWh today (5.71 arbitrage + 4.50 outage backup), backup worth 3,509 UGX. Backup month to date 14.0 kWh; since 26 Sep 95.3 kWh.

Outages: 17:40–18:09 (29 min, battery 83%, low 72%, 1.15 kWh); 20:08–22:50 (162 min, battery 41%, low 15%, 3.27 kWh).

Night charge: 11.0% at 00:00, 25.3% at 01:00.

Battery at 17:00: 89.3%, met the 75% night-cap rule.

Evening L3: 296 minutes below 207 V (known grid pattern).

Modbus errors: not available today.

Needs attention: near miss, battery fell to 15% during the 162-minute outage.

2026-11-06

Daily brief, 6 Nov 2026

• Arbitrage window: battery went from 54% to 11%, 5.78 kWh discharged.
• Arbitrage gain: loss of 259 UGX today. Month to date: 3,096 UGX gain. Since 26 Sep: 26,475 UGX gain.
• Battery-served energy: 9.71 kWh today (6.54 arbitrage + 3.17 backup), backup worth 2,470 UGX. Backup month to date: 9.5 kWh. Since 26 Sep: 90.8 kWh.
• Grid outages (EAT; minutes; battery % start/low/end; kWh supplied):
  • 10:20–10:47; 27 min; 28/28/32%; kWh not available
  • 14:20–14:24; 4 min; 63/63/63%; 0.02 kWh
  • 14:26–17:15; 169 min; 62/60/60%; 1.04 kWh
  • 19:59–20:46; 47 min; 25/6/8%; 1.71 kWh
  • 21:04–21:32; 28 min; 11/7/8%; 0.53 kWh
• Evening L3: low of 196.1 V; 127 minutes below 207 V.
• Modbus errors: not available.
• Night charge: 11% to 40% (grid minimum 233 V). Planner target was 56%.
• 17:00 battery: 60%, below the 75% rule.

Needs attention: near miss, battery fell to 6% during the 47-minute 19:59–20:46 outage; 17:00 battery missed the 75% rule.

2026-11-05

Sezibwa Rentals daily brief, 5 Nov 2026

Arbitrage window (18:00-23:59): Battery went from 19% to 11%, 5.07 kWh discharged. It started below the 30% start rule. Edge sent no data for 169 of 360 minutes, so these figures are estimates.

Arbitrage gain: Loss of UGX -17 today (0.74 kWh arbitrage discharge). Month to date: UGX 3,355. Since 26 Sep: UGX 26,734.

Battery-served energy: 6.21 kWh today (0.74 evening arbitrage plus 5.47 outage backup), worth UGX 4,267 at retail. Backup month to date: 6.4 kWh. Backup since 26 Sep: 87.6 kWh.

Grid outages:

• 04:30-08:13, 223 min, battery 27% to lowest 7%, end 7%, 3.03 kWh
• 13:58-17:23, 205 min, 33% to lowest 25%, end 25%, 1.37 kWh
• 17:35-18:39, 64 min, 23% to lowest 10%, end 10%, 1.47 kWh
• 18:42-19:08, 26 min, 9% to lowest 7%, end 8%, 0.43 kWh
• 19:17-21:39, 142 min, 11% to lowest 9%, end 10%, 0.30 kWh

Evening L3 voltage: Lowest 195.8 V, below 207 V for 138 minutes. Modbus errors: Not available for today. Night charge: 11% at 00:00, 37.5% at 01:00 (up 26.5 points). Planner advisory target was 55%. Battery at 17:00: 26.6%, below the 75% night-cap rule.

Needs attention: near miss (battery fell to 7% in the 223-minute 04:30-08:13 outage), and 17:00 battery at 26.6% missed the 75% night-cap rule.

2026-11-04

Sezibwa Rentals battery, 4 Nov 2026 (EAT)

Arbitrage window: Battery went from 93.5% to 11.0% (day low 10.0%), discharging 9.49 kWh.

Arbitrage gain: Today 1,211 UGX (9.66 kWh basis). Month to date 3,372 UGX. Since 26 Sep 26,751 UGX.

Battery-served energy: Today 9.66 kWh (9.66 arbitrage plus 0.0 outage backup), backup retail value 0 UGX. Backup month to date 0.9 kWh; since 26 Sep 82.2 kWh.

Grid outages: None.

Night charge: Battery rose from 11.0% at 00:00 to 30.0% at 01:00 with grid present. Planner advisory target 54%, actual 30%.

17:00 battery: 99.6%, meets the 75% night-cap rule.

Evening L3 voltage: Minimum 197.5 V, 248 minutes below 207 V.

Modbus errors: Not available today.

Needs attention: Window discharged to 11.0% (low 10.0%), below the 15% floor.

2026-11-03

Operations brief, 3 Nov 2026 (EAT)

Arbitrage window (18:00–23:59): Battery fell from 99.0% to 30.7%, discharging 7.0 kWh.

Arbitrage gain: UGX 798 today (on 6.8 kWh). Month to date UGX 2,161. Since 26 Sep UGX 25,540.

Battery-served energy: 7.22 kWh today (6.8 kWh arbitrage plus 0.42 kWh outage backup), with backup worth UGX 327 at retail. Backup is 0.9 kWh month to date and 82.2 kWh since 26 Sep.

Grid outages:

• 10:52–11:15, 23 min. Battery 79.0% at start, lowest 79.0%, end 82.0%. Battery supplied 0.0 kWh.
• 20:16–20:36, 20 min. Battery 68.0% at start, lowest 65.0%, end 65.0%. Battery supplied 0.38 kWh.

Night charge: Battery rose from 30.3% at 00:00 to 79.0% at 01:00, with grid on. Planner advisory target was 52%.

17:00 battery: 96.6%, meets the 75% night-cap rule.

Evening L3 voltage: Minimum 193.8 V, with 221 minutes below 207 V.

Modbus errors: 2 today, below the normal of about 100.

Meters: All 10 reporting.

Needs attention: nothing.

2026-11-02

Sezibwa Rentals battery, 2 Nov 2026

Evening arbitrage: Battery fell from 96.7% to 22.0%, discharging 7.7 kWh.

Arbitrage gain: 927 UGX today, 1,363 UGX month to date, 24,742 UGX since 26 Sep.

Battery-served energy: 8.04 kWh today (0.0 kWh backup, worth 1 UGX). Backup month to date 0.5 kWh; since 26 Sep 81.7 kWh (63,714 UGX retail).

Grid outage: One, 11:10 to 11:21 EAT, 11 minutes. Battery 92% at start and lowest, 93% at end, 0.0 kWh supplied.

Night charge: 22% at 00:00 rising to 70% at 01:00 EAT, grid 234 V. Planner advisory target 52%; actual 70%.

17:00 battery: 99.4%, meets the 75% rule.

Power quality: L3 spent 211 minutes below 207 V in the evening (lowest 197.8 V). Modbus errors 15, within normal. All 10 meters reporting.

Needs attention: nothing

2026-11-01

Sezibwa Rentals battery, daily brief for 1 Nov 2026

Arbitrage window (18:00–23:59): Battery fell from 95.3% to 20.7%, discharging 7.79 kWh.

Arbitrage gain: 436 UGX today (7.92 kWh discharged). Month to date: 436 UGX. Since 26 Sep: 23,815 UGX.

Battery-served energy: 8.40 kWh today (7.92 kWh arbitrage plus 0.48 kWh outage backup), with backup worth 374 UGX at retail. Backup month to date: 0.5 kWh. Since 26 Sep: 81.7 kWh.

Grid outages:

• 00:01–00:42 EAT (41 min): battery 15% at start, lowest 12%, end 12%, supplied 0.42 kWh.
• 09:40–10:03 (23 min): 34% start, lowest 34%, end 35%, supplied 0.00 kWh.
• 10:57–11:15 (18 min): 48% start, lowest 48%, end 51%, kWh not available.
• 15:13–15:47 (34 min): 98%, supplied 0.02 kWh.

Outage list backup total: 0.44 kWh (incomplete, one outage missing kWh).

Evening L3 voltage: 223 minutes below 207 V. Modbus errors: not available.

Night charge: 20.3% at 00:00, rising to 68.0% at 01:00. Planner advisory target was 52%.

17:00 battery: 97%, meets the 75% night-cap rule.

Needs attention: near miss. Battery fell to 12% during the 41-minute outage starting 00:01.

2026-10-31

Sezibwa Rentals battery, 31 Oct 2026

Evening window: Battery fell from 97.3% to 15.0%, discharging 9.38 kWh.

Arbitrage gain: 371 UGX today (3.39 kWh). Month to date: 22,430 UGX. Since 26 Sep: 23,379 UGX.

Battery-served energy: 9.63 kWh today (3.39 kWh arbitrage plus 6.24 kWh backup), with backup worth 4,866 UGX at retail. Backup month to date: 74.1 kWh. Since 26 Sep: 81.3 kWh.

Grid outages (from the outage list, 6.14 kWh battery-supplied):

• 20:41 to 23:47 EAT, 186 min. Battery 66% at start, lowest 15%, end 15%.
• 23:53 to 00:00 EAT, 7 min. Battery 15% at start, lowest 15%, end 15%.

Evening L3: 170 minutes below 207 V (lowest 180.1 V).

Modbus errors: 13, within normal range.

Night charge: Battery rose from 15% at 00:00 to 23% at 01:00 EAT. Grid was off 00:00–00:45. Planner target was 54%.

17:00 battery: 97.4%, meets the 75% rule.

Needs attention: near miss. Battery hit 15% during the 186-minute outage. No night charge; grid off 00:00–00:45.

2026-10-30

Daily brief, 30 Oct 2026

Arbitrage window: Battery fell from 96.3% to 21.3%, discharging 7.83 kWh.

Arbitrage gain: 552 UGX today; 22,059 UGX month to date; 23,008 UGX since 26 Sep.

Battery-served energy: 10.65 kWh today (7.83 arbitrage + 2.82 outage backup), with the backup worth 2,200 UGX at retail. Backup totals 67.8 kWh month to date and 75.0 kWh since 26 Sep.

Grid outages:

• 04:14–09:35 EAT, 321 min: battery 32% at start, lowest 10%, end 18%, supplied 2.63 kWh.
• 10:07–12:35 EAT, 148 min: battery 24% at start, lowest 24%, end 42%, supplied 0.08 kWh.
• 17:06–17:17 EAT, 11 min: battery 98% at start, lowest 97%, end 97%, supplied 0.06 kWh.

Night charge: Battery rose from 21% at 00:00 to 70% at 01:00 EAT. Planner target was 55%.

Evening L3 voltage: Lowest 199.6 V, below 207 V for 224 minutes.

Battery at 17:00: 98.2%, meets the 75% rule.

Modbus errors: Not available. Meters: None sparse or silent.

Needs attention: near miss. Battery fell to 10% during the 321-minute outage from 04:14 to 09:35 EAT.

2026-10-29

Daily brief, 29 Oct 2026

Arbitrage window (18:00–23:59): battery 17.3% to 11.0%, 3.30 kWh discharged. Estimate only: no data for 143 of 360 minutes.

Arbitrage gain today: loss of 5 UGX. Month to date 21,507 UGX; since 26 Sep 22,456 UGX.

Battery-served energy: 9.01 kWh today (0.04 arbitrage + 8.97 backup), backup worth 6,989 UGX. Backup month to date 65.0 kWh; since 26 Sep 72.2 kWh.

Grid outages (EAT; minutes; battery % start/lowest/end; kWh):

• 03:02–03:59; 57; 56/51/51; 0.61
• 04:49–09:49; 300; 50/19/22; 3.27
• 09:51–11:09; 78; 22/22/25; 0.12
• 11:11–13:00; 109; 25/25/44; 0.03
• 14:11–16:02; 111; 51/32/32; 2.10
• 16:04–16:51; 47; 32/26/26; 0.63
• 16:53–18:18; 85; 26/17/17; 1.18
• 18:50–21:34; 164; 16/5/5; 1.04

Night charge: 11% at 00:00, 35% at 01:00, up 24 points. Planner target 57%; actual 35%.

Battery at 17:00: 25.2%, below the 75% night-cap rule.

Evening L3: 112 minutes below 207 V. Modbus errors: not available.

Needs attention: near miss, battery fell to 5% during the 18:50–21:34 outage (164 min). Also 17:00 battery at 25.2% missed the 75% rule.

2026-10-28

Daily brief, Sezibwa Rentals battery, 28 Oct 2026

Arbitrage window: Battery fell from 93.3% to 35.0%, discharging 6.07 kWh.

Arbitrage gain: UGX 715 today (5.86 kWh). Month to date UGX 21,512. Since 26 Sep UGX 22,461.

Battery-served energy: 6.80 kWh today (5.86 arbitrage + 0.94 backup), backup worth UGX 731. Backup month to date 56.1 kWh; since 26 Sep 63.2 kWh.

Grid outages:

• 14:47–15:41 EAT (54 min): battery 97%, lowest 90%, end 90%, supplied 0.66 kWh.
• 22:54–23:10 EAT (16 min): battery 41%, lowest 39%, end 39%, supplied 0.23 kWh.

Evening L3: Lowest 194.1 V; 233 minutes below 207 V (known sag pattern). Modbus errors not available for the day.

Night charge: 34.5% at 00:00, 58.0% at 01:00 (up 23.5 points). Planner target 50%; actual 58.0%.

17:00 battery: 93.8%, meets the 75% night-cap rule.

Needs attention: nothing.

2026-10-27

Daily brief, Sezibwa Rentals battery, 27 Oct 2026

Evening arbitrage: battery fell from 96.3% to 34.0%, discharging 6.79 kWh.

Arbitrage gain: UGX 1,068 today, UGX 20,797 month to date, UGX 21,746 since 26 Sep.

Battery-served energy: 7.59 kWh today (6.79 arbitrage plus 0.80 outage backup), backup worth UGX 620. Backup kWh: 55.1 month to date, 62.3 since 26 Sep.

Grid outages (from outage list):

• 03:47 to 03:51 EAT, 4 minutes. Battery 98% throughout. Battery supplied 0.03 kWh.
• 13:21 to 14:35 EAT, 74 minutes. Battery 96% at start, lowest 89%, 0.74 kWh supplied.

Evening L3 voltage was below 207 V for 221 minutes, lowest 194.2 V. Modbus errors: not available.

Night charge: 33.5% at 00:00 rising to 77.3% at 01:00, grid present. Battery at 17:00: 98%, meets the 75% night-cap rule.

Needs attention: nothing.

2026-10-26

Daily brief, Sezibwa Rentals battery, 2026-10-26

Evening arbitrage window: The battery went from 81.5% to 22.3% and discharged 6.19 kWh.

Arbitrage gain: 1,108 UGX today (5.95 kWh discharged). Month to date: 19,729 UGX. Since 26 Sep: 20,678 UGX.

Battery-served energy: 6.76 kWh today (5.95 kWh evening arbitrage plus 0.81 kWh outage backup). The backup is worth 633 UGX at retail. Backup month to date: 54.3 kWh. Backup since 26 Sep: 61.5 kWh.

Grid outage: 13:40 to 14:37 EAT, 57 minutes. Battery was at 92% at the start, fell to a lowest of 84%, and ended at 84%. It supplied 0.79 kWh (from the outage list, not the ledger).

Evening L3 voltage: Lowest 192.5 V, with 180 minutes below 207 V. This is the known grid-side pattern.

Meters: All 10 checked; none sparse or silent.

Modbus read errors: Not available for today.

Needs attention: nothing

2026-10-25

Sezibwa Rentals battery daily brief, 25 Oct 2026

Arbitrage window (18:00–23:59 EAT): Battery started at 89.0% and ended at 19.7%, discharging 7.09 kWh. Lowest charge today was 15.0%.

Arbitrage gain: Today 1,345 UGX (7.19 kWh discharged). Month to date 18,621 UGX. Total since 26 Sep 19,570 UGX.

Battery-served energy: Today 7.19 kWh total (7.19 arbitrage plus 0.0 outage backup), backup retail value 0 UGX. Backup kWh month to date 53.5; since 26 Sep 60.7.

Grid outages: None. Grid was off for 0 minutes. Outage backup from the outage list: 0.0 kWh.

Evening L3 voltage: Lowest 196.0 V, with 191 minutes below 207 V.

Modbus errors: Not available for today. Normal is about 100 per day plus a nightly burst.

Data quality: All 10 meters reported; none sparse or silent.

Needs attention: nothing

2026-10-24

Sezibwa Rentals battery, 24 Oct 2026

Arbitrage window (18:00-23:59): Battery went from 39.5% to 15.0% and discharged 3.24 kWh. The edge sent no data for 288 of the 360 window minutes, so these figures are estimates.

Arbitrage gain: The day figure could not be calculated. Month to date (October): 17,276 UGX. Total since 26 Sep: 18,225 UGX.

Battery-served energy: Day total not available, as the day's backup kWh was missing. Backup kWh month to date: 53.5. Since 26 Sep: 60.7 kWh, worth 47,300 UGX at retail.

Grid outages:

• 07:16-09:15 EAT, 119 min. Battery 95% at start, lowest 61%, end 61%. Supplied 3.72 kWh.
• 12:51-14:30 EAT, 99 min. Battery 59% at start, lowest 42%, end 42%. Supplied 1.73 kWh.

No near misses.

Evening L3 voltage: Lowest 199.9 V; 55 minutes below 207 V.

Modbus errors: Day count not available, so no comparison to normal.

Meters: All 10 reporting.

Needs attention: Edge data gap covering 288 of 360 arbitrage-window minutes.

2026-10-22

Sezibwa Rentals daily brief, 22 Oct 2026

Arbitrage window: Battery went from 35.0% to 10.6%, discharging 3.26 kWh.

Arbitrage gain: 417 UGX today (2.35 kWh). Month to date: 17,235 UGX. Since 26 Sep: 18,184 UGX.

Battery-served energy: 5.04 kWh today (2.35 kWh arbitrage plus 2.69 kWh outage backup), with backup worth 2,100 UGX at retail. Backup month to date: 53.5 kWh. Since 26 Sep: 60.7 kWh.

Grid outages (EAT):

• 03:41 to 09:10, 329 min. Start 97%, lowest 41%, end 41%, 5.64 kWh supplied.
• 19:34 to 20:00, 26 min. Start 14%, lowest 13%, end 13%, 0.67 kWh supplied.
• 20:27 to 20:34, 7 min. Start 11%, lowest 9%, end 9%, 0.13 kWh supplied.

Evening L3 voltage: Lowest 190.2 V, with 189 minutes below 207 V (known grid pattern). Modbus errors: 0, against a normal of about 100 a day.

Needs attention: near miss. The battery fell to 9% during the 7-minute outage at 20:27 EAT.

2026-10-21

Sezibwa Rentals battery daily brief, 21 Oct 2026

Arbitrage window (18:00-23:59): Battery went from 87% to 15%, with 7.62 kWh discharged. The 15% end reading is the last one in the final hour; the edge device was offline at window end.

Arbitrage gain: 579 UGX today (3.14 kWh). Month to date: 16,818 UGX. Since 26 Sep: 17,767 UGX.

Battery-served energy: 6.32 kWh today (3.14 arbitrage plus 3.18 backup), worth 2,478 UGX in backup retail value. Backup month to date: 50.8 kWh. Backup since 26 Sep: 58.0 kWh.

Grid outages:

• 12:53-13:10 EAT, 17 min. Battery 92% at start, lowest 90%, end 90%. Supplied 0.2 kWh.
• 20:48-23:00 EAT, 132 min. Battery 56% at start, lowest 16%, end 16%. Supplied 4.28 kWh.

Evening L3 voltage: 168 minutes below 207 V. Lowest L3 reading was 108.2 V.

Modbus errors: 0 today, below the normal of about 100 per day.

Meters: All 10 reporting; none sparse or silent.

Needs attention: near miss. Battery fell to 16% during the 132-minute evening outage.

Needs attention: near miss, battery dropped to 16% in the 20:48-23:00 outage.

2026-10-20

Daily brief, Sezibwa Rentals battery, 20 Oct 2026

Arbitrage window: battery fell from 39.7% to 15.0%, discharging 2.48 kWh.

Arbitrage gain: UGX 475 today, UGX 16,239 month to date, UGX 17,188 since 26 Sep.

Battery-served energy: 9.27 kWh today (2.62 kWh arbitrage plus 6.65 kWh backup). Backup was worth UGX 5,186 at retail. Backup totals 47.6 kWh month to date and 54.8 kWh since 26 Sep.

Grid outages:

• 04:25–05:24 EAT, 59 min: battery 98% at start, lowest 91%, end 91%, supplied 0.7 kWh.
• 05:49–09:30 EAT, 221 min: battery 99% at start, lowest 61%, end 61%, supplied 4.43 kWh.
• 09:37–11:07 EAT, 90 min: battery 60% at start, lowest 44%, end 44%, supplied 1.64 kWh.

Near misses: none.

Evening L3 voltage was below 207 V for 214 minutes.

Modbus errors: 0, within normal range.

Needs attention: nothing.

2026-10-19

Sezibwa Rentals battery, 19 Oct 2026

Arbitrage window: The battery went from 74.3% to 15.0% and discharged 5.7 kWh.

Arbitrage gain: UGX 1,066 today. UGX 15,764 month to date. UGX 16,713 since 26 Sep.

Battery-served energy: 8.17 kWh today (5.7 kWh arbitrage plus 2.47 kWh outage backup, worth UGX 1,926 at retail). Backup totals 41.0 kWh month to date and 48.2 kWh since 26 Sep.

Grid outages (166 minutes total, no near miss):

• 02:20–03:03, 43 min. Battery 100%, lowest 94%, ended 94%. Supplied 0.49 kWh.
• 13:50–15:43, 113 min. Battery 92%, lowest 76%, ended 76%. Supplied 1.73 kWh.
• 19:33–19:40, 7 min. Battery 60%, lowest 58%, ended 58%. Supplied 0.14 kWh.

Evening L3 voltage: Minimum 194.9 V, with 202 minutes below 207 V.

Modbus errors: Not available for today. All 10 meters reported.

Needs attention: nothing

2026-10-18

Daily brief, Sezibwa Rentals battery, 18 Oct 2026

Evening arbitrage window (18:00–23:59): Battery fell from 79.3% to 15.0%, discharging 7.53 kWh, and stopped at the 15% floor.

Arbitrage gain: 272 UGX today (1.57 kWh). Month to date: 14,698 UGX. Since 26 Sep: 15,647 UGX.

Battery-served energy: 8.58 kWh today (1.57 kWh arbitrage plus 7.01 kWh outage backup). The backup is worth 5,463 UGX at retail. Backup month to date: 38.5 kWh. Since 26 Sep: 45.7 kWh.

Grid outages:

• 12:36–13:34 EAT (58 min): battery 92% at start, lowest 83%, end 83%, supplied 0.94 kWh.
• 19:25–22:38 EAT (193 min): battery 66% at start, lowest 15%, end 15%, supplied 6.08 kWh.

Evening L3 voltage: Minimum 201.2 V, below 207 V for 38 minutes (known grid-side pattern).

Meters: All 10 reporting, none sparse or silent. Modbus errors: 197, within normal range including the nightly burst.

Needs attention: nothing.

2026-10-17

Daily brief, Sezibwa Rentals battery, 2026-10-17 (EAT)

Arbitrage window (18:00–23:59): Battery fell from 55% to 15%, discharging 4.14 kWh. It reached the 15% floor.

Grid outages (279 minutes total, four outages):

• 03:40–03:43, 3 min: start 98%, lowest 98%, end 98%, supplied 0.02 kWh.
• 03:51–07:03, 192 min: start 97%, lowest 74%, end 74%, supplied 2.44 kWh.
• 13:52–14:19, 27 min: start 69%, lowest 65%, end 65%, supplied 0.51 kWh.
• 14:22–15:15, 53 min: start 64%, lowest 57%, end 57%, supplied 0.75 kWh.

Evening L3 voltage: Minimum 195.3 V. Spent 212 minutes below 207 V.

Data quality: All 10 meters reported. None were sparse or silent.

Modbus errors: Daily count not available. Normal is about 100 per day, plus a nightly burst of about 80 per hour from 00:00–02:00.

Needs attention: nothing

2026-10-16

Daily brief: Sezibwa Rentals battery, 16 October 2026 (EAT)

Arbitrage window (18:00–23:59): The battery fell from 91.3% to 15.0% and discharged 7.97 kWh. It reached the 15% floor.

Grid outage: One outage, 03:44 to 05:03 EAT, lasting 79 minutes. The battery started at 98%, dropped to a low of 89%, and ended at 89%. It supplied 0.93 kWh. The day's grid-off total was recorded as 80 minutes.

Evening L3 voltage: 207 minutes below 207 V, with a lowest reading of 199.8 V. This is the known grid-side pattern.

Data quality: All 10 meters reported. None were sparse or silent.

Modbus read errors: 311, against an expected figure of about 260 (about 100 baseline plus about 160 from the nightly 00:00–02:00 charging burst).

Needs attention: Modbus read errors at 311, above the expected ~260. Review the Modbus communication logs for the day.

2026-10-15

Daily brief: Sezibwa Rentals battery, 15 October 2026 (EAT)

Arbitrage window (18:00–23:59): The battery started at 89.0% and ended at 20.3%, discharging 6.94 kWh. The day's lowest state of charge was 20.0%.

Grid outages: None. Grid-off time was 0.0 minutes.

Evening L3 voltage: L3 was below 207 V for 180 minutes, with a lowest reading of 197.6 V. This is the known grid-side sag pattern. L1 and L2 minimums were 220.5 V and 212.3 V.

Modbus errors: The daily count was not available. Normal is about 100 per day.

Meters: All 10 checked meters reported. None were sparse or silent.

Needs attention: nothing

2026-10-14

Daily brief: Sezibwa Rentals, 14 October 2026

Arbitrage window (18:00–23:59): The battery started at 89% and ended at 24%, discharging 6.7 kWh. Its lowest level for the day was 15%.

Grid outages: None. Power was off for 0 minutes.

Evening L3 voltage: The lowest L3 reading was 193.5 V. L3 spent 233 minutes below 207 V. This matches the known grid-side sag pattern.

Modbus errors: 275 for the day. Normal is about 100 plus the nightly burst from midnight to 2 AM, roughly 260 in total, so this is slightly higher than expected.

Needs attention: Modbus read errors were slightly above expected (275 vs. about 260). Check whether this repeats tomorrow.

2026-10-13

Daily brief, Sezibwa Rentals battery, 13 October 2026

The evening arbitrage window ran from 89% to 15% battery charge, discharging 7.5 kWh. The battery held the 15% floor.

There was no grid outage today (0 minutes).

Evening voltage on phase L3 was below 207 V for 189 minutes. The lowest L3 reading was 197.6 V. This matches the known evening pattern.

Modbus read errors totalled 230. That is within the normal range, which allows about 100 per day plus the nightly burst from midnight to 2 AM while the battery charges.

Needs attention: nothing.