Energy savings
AlphaESS inverter joined to Octopus half-hourly meter reads and tariff prices.
Solar & battery installed by Heatable
£150 off solar £75 off a battery £50 off your Octopus bill referral
2026
1 Jan 2026 – 31 Aug 2026
Updated 31st August 2026, 01:30
waiting on Octopus meter
Total benefit
£1,930.45
A lower bill plus export payments, over 11617 half-hours
Saved on bills
£1,375.14
Against no solar and no battery
Earned from export
£555.31
Export payments — real money in
Would have paid
£2,482.72
No panels, no battery
Actually paid
£1,107.58
Before export payments and standing charge
· £552.27 net of export
Solar generation
8,064 kWh
43.1% used at home,
4,589 kWh exported
Heating
4,686 kWh
£598.54 of the bill
· 48.4% of what the house used
· £1,311.44 without solar
Self-sufficiency
33.1%
9,679 kWh used, 6,471 kWh bought
EV charging
£231.30
1,740 kWh, excluded from savings
Battery round-trip
92.3%
3,192 kWh discharged
Where the benefit came from, by day
Solar and battery are separated by costing three worlds for every half hour — no panels and no battery, panels alone, then what actually happened — and taking the differences. A negative battery day is one that spent more storing energy than it gave back; it returns when the battery discharges. Export earnings sit inside the solar bar rather than beside it: the panels-alone world already sells its surplus, so that income is part of what solar is worth.
Solar (including export earnings)
Battery
View as table
| Day | Solar | Battery | Total | of which export | Solar kWh | Imported | Exported |
|---|---|---|---|---|---|---|---|
| Mon 31 Aug | £0.00 | £0.00 | £0.00 | £0.00 | 0.0 | 0.1 | 0.0 |
| Sun 30 Aug | £4.85 | −£0.74 | £4.10 | £1.38 | 30.1 | 0.8 | 11.5 |
| Sat 29 Aug | £2.36 | £0.36 | £2.73 | £0.17 | 12.3 | 1.1 | 1.4 |
| Fri 28 Aug | £5.95 | £0.28 | £6.23 | £3.79 | 40.1 | 1.3 | 31.6 |
| Thu 27 Aug | £4.32 | £0.21 | £4.52 | £2.22 | 28.1 | 1.3 | 18.5 |
| Wed 26 Aug | £6.81 | £0.14 | £6.95 | £3.58 | 43.8 | 1.0 | 29.8 |
| Tue 25 Aug | £7.18 | £0.46 | £7.64 | £4.55 | 50.4 | 1.0 | 37.9 |
| Mon 24 Aug | £7.79 | £0.36 | £8.15 | £3.76 | 47.2 | 1.7 | 31.3 |
| Sun 23 Aug | £7.55 | £0.89 | £8.44 | £2.70 | 41.2 | 1.6 | 22.5 |
| Sat 22 Aug | £7.50 | £0.29 | £7.79 | £3.93 | 47.2 | 2.0 | 32.7 |
| Fri 21 Aug | £6.59 | £0.60 | £7.19 | £3.36 | 41.5 | 1.5 | 28.0 |
| Thu 20 Aug | £6.33 | £0.11 | £6.43 | £2.82 | 38.5 | 1.3 | 23.5 |
| Wed 19 Aug | £4.85 | £0.65 | £5.50 | £2.23 | 31.6 | 1.1 | 18.5 |
| Tue 18 Aug | £4.48 | £0.51 | £4.98 | £1.72 | 27.0 | 0.8 | 14.3 |
| Mon 17 Aug | £5.86 | £0.31 | £6.17 | £2.54 | 36.5 | 0.7 | 21.2 |
| Sun 16 Aug | £5.45 | £0.49 | £5.93 | £1.87 | 32.1 | 0.8 | 15.6 |
| Sat 15 Aug | £6.26 | −£0.18 | £6.07 | £2.17 | 40.8 | 0.9 | 18.1 |
| Fri 14 Aug | £7.40 | −£0.47 | £6.93 | £3.55 | 48.8 | 0.8 | 29.6 |
| Thu 13 Aug | £8.27 | £1.41 | £9.67 | £3.97 | 52.0 | 0.6 | 33.1 |
| Wed 12 Aug | £7.84 | £0.21 | £8.06 | £4.39 | 53.9 | 0.7 | 36.6 |
| Tue 11 Aug | £7.90 | £0.28 | £8.18 | £5.06 | 55.8 | 0.8 | 42.2 |
| Mon 10 Aug | £8.32 | £0.14 | £8.47 | £4.32 | 54.4 | 1.0 | 36.0 |
| Sun 9 Aug | £6.86 | −£1.83 | £5.03 | £2.14 | 52.8 | 1.3 | 17.8 |
| Sat 8 Aug | £8.64 | £0.79 | £9.43 | £5.05 | 56.1 | 1.0 | 42.1 |
| Fri 7 Aug | £8.39 | −£0.19 | £8.20 | £5.41 | 58.3 | 1.0 | 45.1 |
| Thu 6 Aug | £8.32 | £0.67 | £8.99 | £4.28 | 49.3 | 1.3 | 35.7 |
| Wed 5 Aug | £6.50 | −£1.87 | £4.63 | £1.87 | 42.8 | 4.6 | 15.6 |
| Tue 4 Aug | £6.79 | £0.14 | £6.93 | £2.95 | 40.8 | 0.9 | 24.6 |
| Mon 3 Aug | £7.48 | £0.64 | £8.12 | £3.84 | 47.0 | 0.9 | 32.0 |
| Sun 2 Aug | £8.80 | £0.33 | £9.14 | £4.78 | 56.2 | 1.1 | 39.8 |
| Sat 1 Aug | £9.04 | £0.22 | £9.27 | £5.16 | 59.4 | 1.1 | 43.0 |
| Fri 31 Jul | £7.12 | £0.55 | £7.67 | £4.01 | 48.2 | 0.8 | 33.4 |
| Thu 30 Jul | £8.41 | £0.34 | £8.75 | £4.33 | 52.8 | 0.8 | 36.1 |
| Wed 29 Jul | £8.95 | £0.85 | £9.80 | £5.32 | 58.4 | 0.9 | 44.4 |
| Tue 28 Jul | £8.19 | −£0.35 | £7.84 | £3.99 | 51.9 | 1.3 | 33.3 |
| Mon 27 Jul | £8.23 | £1.81 | £10.04 | £5.19 | 57.5 | 1.1 | 43.2 |
| Sun 26 Jul | £7.54 | £0.01 | £7.55 | £2.57 | 43.4 | 1.0 | 21.4 |
| Sat 25 Jul | £9.35 | £1.59 | £10.94 | £5.15 | 59.8 | 1.2 | 42.9 |
| Fri 24 Jul | £7.81 | −£0.56 | £7.25 | £2.68 | 44.9 | 1.5 | 22.3 |
| Thu 23 Jul | £6.33 | £0.91 | £7.24 | £2.93 | 40.5 | 1.8 | 24.4 |
| Wed 22 Jul | £6.53 | £0.55 | £7.08 | £2.60 | 41.0 | 1.4 | 21.6 |
| Tue 21 Jul | £6.08 | £1.93 | £8.01 | £2.67 | 36.9 | 1.7 | 22.2 |
| Mon 20 Jul | £10.04 | £0.71 | £10.76 | £5.46 | 64.3 | 2.0 | 45.5 |
| Sun 19 Jul | £9.07 | £0.72 | £9.79 | £5.99 | 62.9 | 1.4 | 49.9 |
| Sat 18 Jul | £8.79 | −£0.22 | £8.57 | £5.67 | 61.4 | 1.0 | 47.3 |
| Fri 17 Jul | £8.00 | £0.09 | £8.09 | £5.09 | 55.5 | 1.4 | 42.5 |
| Thu 16 Jul | £9.58 | −£0.24 | £9.34 | £5.30 | 64.7 | 0.9 | 44.2 |
| Wed 15 Jul | £9.76 | £1.20 | £10.96 | £5.54 | 66.0 | 1.2 | 46.1 |
| Tue 14 Jul | £11.88 | −£0.12 | £11.77 | £5.20 | 67.1 | 0.9 | 43.3 |
| Mon 13 Jul | £9.62 | −£0.52 | £9.10 | £5.43 | 67.4 | 1.0 | 45.3 |
| Sun 12 Jul | £9.19 | −£0.66 | £8.53 | £5.44 | 68.3 | 0.9 | 45.3 |
| Sat 11 Jul | £9.56 | £0.39 | £9.95 | £6.14 | 66.7 | 0.8 | 51.2 |
| Fri 10 Jul | £9.40 | £0.78 | £10.18 | £5.83 | 62.9 | 0.8 | 48.6 |
| Thu 9 Jul | £9.28 | £0.19 | £9.47 | £5.94 | 63.6 | 0.8 | 49.5 |
| Wed 8 Jul | £10.20 | £0.42 | £10.63 | £5.22 | 63.5 | 0.7 | 43.5 |
| Tue 7 Jul | £9.02 | £0.51 | £9.53 | £5.70 | 62.3 | 0.9 | 47.5 |
| Mon 6 Jul | £9.73 | £0.57 | £10.30 | £5.77 | 64.5 | 0.9 | 48.1 |
| Sun 5 Jul | £10.40 | £0.23 | £10.64 | £5.17 | 63.1 | 1.1 | 43.1 |
| Sat 4 Jul | £9.72 | £0.49 | £10.21 | £4.50 | 57.2 | 1.2 | 37.5 |
| Fri 3 Jul | £10.08 | −£0.07 | £10.01 | £6.48 | 68.5 | 1.1 | 54.0 |
| Thu 2 Jul | £9.40 | −£0.01 | £9.38 | £5.58 | 62.2 | 0.9 | 46.5 |
| Wed 1 Jul | £7.17 | −£1.03 | £6.14 | £2.29 | 43.4 | 1.8 | 19.1 |
| Tue 30 Jun | £6.54 | −£1.30 | £5.24 | £2.23 | 41.5 | 1.6 | 18.6 |
| Mon 29 Jun | £9.71 | £0.16 | £9.88 | £5.53 | 62.4 | 0.9 | 46.1 |
| Sun 28 Jun | £9.94 | £0.27 | £10.21 | £4.47 | 59.6 | 0.8 | 37.3 |
| Sat 27 Jun | £7.15 | £0.37 | £7.51 | £3.47 | 45.0 | 0.8 | 28.9 |
| Fri 26 Jun | £9.37 | −£1.65 | £7.72 | £3.44 | 60.0 | 0.6 | 28.6 |
| Thu 25 Jun | £9.90 | −£1.67 | £8.23 | £4.36 | 66.3 | 0.8 | 36.3 |
| Wed 24 Jun | £9.93 | £0.50 | £10.43 | £6.11 | 66.4 | 0.5 | 50.9 |
| Tue 23 Jun | £7.93 | £0.23 | £8.15 | £5.15 | 55.6 | 0.7 | 42.9 |
| Mon 22 Jun | £10.04 | £0.05 | £10.09 | £6.26 | 67.6 | 1.2 | 52.1 |
| Sun 21 Jun | £8.16 | £0.38 | £8.55 | £5.06 | 53.5 | 1.1 | 42.1 |
| Sat 20 Jun | £6.06 | −£0.38 | £5.68 | £2.62 | 36.9 | 1.4 | 21.9 |
| Fri 19 Jun | £10.45 | £0.46 | £10.91 | £6.30 | 70.3 | 1.8 | 52.5 |
| Thu 18 Jun | £6.07 | £0.28 | £6.35 | £2.51 | 34.6 | 1.7 | 21.0 |
| Wed 17 Jun | £6.46 | £0.15 | £6.61 | £2.94 | 39.2 | 1.8 | 24.5 |
| Tue 16 Jun | £9.60 | £0.02 | £9.61 | £5.73 | 63.2 | 1.9 | 47.7 |
| Mon 15 Jun | £9.42 | −£0.16 | £9.26 | £4.37 | 55.8 | 2.2 | 36.4 |
| Sun 14 Jun | £10.85 | −£0.60 | £10.25 | £4.82 | 67.0 | 2.0 | 40.1 |
| Sat 13 Jun | £12.78 | £1.86 | £14.64 | £5.00 | 72.0 | 2.8 | 41.6 |
| Fri 12 Jun | £8.61 | £1.53 | £10.14 | £1.99 | 35.3 | 16.0 | 16.6 |
| Thu 11 Jun | £5.68 | £1.74 | £7.42 | £0.69 | 18.0 | 17.3 | 5.7 |
| Wed 10 Jun | £0.00 | −£0.06 | −£0.06 | £0.00 | 0.0 | 22.4 | 0.0 |
| Tue 9 Jun | £2.08 | −£0.05 | £2.03 | £0.17 | 6.8 | 25.3 | 1.5 |
| Mon 8 Jun | £5.59 | £0.94 | £6.54 | £1.30 | 23.5 | 16.3 | 10.9 |
| Sun 7 Jun | £6.68 | −£2.18 | £4.50 | £0.91 | 34.8 | 10.4 | 7.6 |
| Sat 6 Jun | £4.79 | £3.69 | £8.48 | £0.48 | 19.4 | 5.1 | 4.0 |
| Fri 5 Jun | £7.16 | −£0.42 | £6.74 | £2.85 | 40.7 | 4.2 | 23.7 |
| Thu 4 Jun | £7.91 | £0.55 | £8.46 | £2.10 | 40.1 | 3.9 | 17.5 |
| Wed 3 Jun | £5.39 | £0.08 | £5.47 | £0.39 | 20.8 | 4.7 | 3.3 |
| Tue 2 Jun | £5.96 | £0.28 | £6.24 | £1.94 | 31.2 | 2.1 | 16.2 |
| Mon 1 Jun | £7.63 | −£0.11 | £7.52 | £4.01 | 48.7 | 1.5 | 33.5 |
| Sun 31 May | £7.17 | £0.10 | £7.27 | £3.80 | 46.8 | 0.9 | 31.7 |
| Sat 30 May | £9.24 | £0.34 | £9.57 | £5.35 | 60.3 | 1.0 | 44.6 |
| Fri 29 May | £7.53 | £0.31 | £7.84 | £3.72 | 46.1 | 0.7 | 31.0 |
| Thu 28 May | £8.04 | −£0.07 | £7.97 | £4.84 | 55.8 | 0.8 | 40.3 |
| Wed 27 May | £10.57 | £0.72 | £11.28 | £5.61 | 65.5 | 0.8 | 46.8 |
| Tue 26 May | £9.56 | £0.42 | £9.98 | £6.02 | 64.1 | 0.9 | 50.2 |
| Mon 25 May | £8.85 | −£0.09 | £8.76 | £5.20 | 59.5 | 0.8 | 43.4 |
| Sun 24 May | £8.94 | £0.32 | £9.26 | £5.52 | 60.6 | 1.0 | 46.0 |
| Sat 23 May | £9.85 | £0.05 | £9.90 | £4.73 | 61.0 | 1.1 | 39.5 |
| Fri 22 May | £10.44 | £1.39 | £11.83 | £6.12 | 65.1 | 7.0 | 51.0 |
| Thu 21 May | £11.32 | £1.54 | £12.85 | £4.62 | 58.0 | 15.7 | 38.5 |
| Wed 20 May | £9.46 | £1.31 | £10.76 | £2.30 | 39.9 | 21.5 | 19.1 |
| Tue 19 May | £6.95 | £3.55 | £10.50 | £0.70 | 27.6 | 23.9 | 5.9 |
| Mon 18 May | £8.92 | £3.05 | £11.97 | £1.42 | 34.5 | 22.7 | 11.8 |
| Sun 17 May | £11.41 | £3.20 | £14.60 | £2.39 | 46.4 | 21.8 | 19.9 |
| Sat 16 May | £9.21 | £2.94 | £12.15 | £1.39 | 35.6 | 21.9 | 11.6 |
| Fri 15 May | £9.37 | £2.98 | £12.35 | £1.98 | 39.7 | 21.7 | 16.5 |
| Thu 14 May | £10.36 | £2.25 | £12.60 | £2.93 | 45.8 | 24.3 | 24.4 |
| Wed 13 May | £9.20 | £3.50 | £12.70 | £2.76 | 43.6 | 20.0 | 23.0 |
| Tue 12 May | £10.29 | £2.63 | £12.92 | £2.76 | 49.2 | 22.6 | 23.0 |
| Mon 11 May | £7.34 | £3.07 | £10.41 | £0.80 | 29.3 | 25.2 | 6.7 |
| Sun 10 May | £5.34 | £3.68 | £9.02 | £0.71 | 19.4 | 18.0 | 5.9 |
| Sat 9 May | £10.66 | £2.00 | £12.66 | £4.32 | 56.0 | 15.7 | 36.0 |
| Fri 8 May | £9.25 | £2.01 | £11.26 | £2.84 | 44.0 | 17.0 | 23.7 |
| Thu 7 May | £6.91 | £1.99 | £8.90 | £0.60 | 24.2 | 17.5 | 5.0 |
| Wed 6 May | £9.42 | £1.50 | £10.92 | £3.09 | 44.9 | 15.5 | 25.7 |
| Tue 5 May | £9.67 | £1.54 | £11.21 | £4.38 | 53.0 | 15.2 | 36.5 |
| Mon 4 May | £6.48 | £1.30 | £7.78 | £1.37 | 27.2 | 20.7 | 11.5 |
| Sun 3 May | £8.69 | £2.19 | £10.88 | £3.32 | 42.7 | 13.9 | 27.7 |
| Sat 2 May | £8.91 | £0.89 | £9.80 | £4.66 | 52.2 | 12.0 | 38.8 |
| Fri 1 May | £8.57 | £0.73 | £9.30 | £4.45 | 50.4 | 14.6 | 37.1 |
| Thu 30 Apr | £9.72 | £2.80 | £12.52 | £4.08 | 53.5 | 18.0 | 34.0 |
| Wed 29 Apr | £9.20 | £2.25 | £11.45 | £4.42 | 55.2 | 14.5 | 36.9 |
| Tue 28 Apr | £7.75 | £1.50 | £9.25 | £3.05 | 43.3 | 15.9 | 25.5 |
| Mon 27 Apr | £8.83 | £1.99 | £10.83 | £4.09 | 53.9 | 15.6 | 34.0 |
| Sun 26 Apr | £9.71 | £0.97 | £10.68 | £3.59 | 53.0 | 16.7 | 29.9 |
| Sat 25 Apr | £9.38 | £2.22 | £11.60 | £3.55 | 52.3 | 19.9 | 29.6 |
| Fri 24 Apr | £10.15 | £2.31 | £12.46 | £4.40 | 59.8 | 22.2 | 36.7 |
| Thu 23 Apr | £9.59 | £3.60 | £13.19 | £4.15 | 57.3 | 19.6 | 34.6 |
| Wed 22 Apr | £10.02 | £2.67 | £12.70 | £4.20 | 59.3 | 24.3 | 35.0 |
| Tue 21 Apr | £7.55 | £2.91 | £10.47 | £1.01 | 36.2 | 23.1 | 8.4 |
| Mon 20 Apr | £7.82 | £3.03 | £10.85 | £2.37 | 40.9 | 20.1 | 19.7 |
| Sun 19 Apr | £9.31 | £2.14 | £11.45 | £3.44 | 51.6 | 17.3 | 28.7 |
| Sat 18 Apr | £8.78 | £1.63 | £10.42 | £2.81 | 46.5 | 19.8 | 23.4 |
| Fri 17 Apr | £8.85 | £1.51 | £10.36 | £3.25 | 48.6 | 22.0 | 27.0 |
| Thu 16 Apr | £6.03 | £2.08 | £8.11 | £0.57 | 23.9 | 31.5 | 4.8 |
| Wed 15 Apr | £3.72 | £3.52 | £7.24 | £0.59 | 13.3 | 36.5 | 4.9 |
| Tue 14 Apr | £5.32 | £3.30 | £8.62 | £0.63 | 19.2 | 34.5 | 5.3 |
| Mon 13 Apr | £4.85 | £3.11 | £7.97 | £0.67 | 17.4 | 32.4 | 5.5 |
| Sun 12 Apr | £5.04 | £3.22 | £8.25 | £0.77 | 18.2 | 32.3 | 6.4 |
| Sat 11 Apr | £4.16 | £3.50 | £7.66 | £0.65 | 14.9 | 31.5 | 5.4 |
| Fri 10 Apr | £4.23 | £2.35 | £6.58 | £0.59 | 15.2 | 25.0 | 4.9 |
| Thu 9 Apr | £2.79 | £2.10 | £4.89 | £0.48 | 10.4 | 24.2 | 4.0 |
| Wed 8 Apr | £3.01 | £1.63 | £4.65 | £0.49 | 11.0 | 30.6 | 4.1 |
| Tue 7 Apr | £4.05 | £3.50 | £7.55 | £0.68 | 14.5 | 31.4 | 5.6 |
| Mon 6 Apr | £6.98 | £3.18 | £10.16 | £0.61 | 25.2 | 38.3 | 5.1 |
| Sun 5 Apr | £5.53 | £3.27 | £8.80 | £0.62 | 19.8 | 38.6 | 5.1 |
| Sat 4 Apr | £4.80 | £3.33 | £8.13 | £0.57 | 17.3 | 49.7 | 4.8 |
| Fri 3 Apr | £3.11 | £3.82 | £6.93 | £0.42 | 11.2 | 45.0 | 3.5 |
| Thu 2 Apr | £4.89 | £3.50 | £8.40 | £0.64 | 17.5 | 48.0 | 5.3 |
| Wed 1 Apr | £4.72 | £3.30 | £8.01 | £0.63 | 16.9 | 39.3 | 5.2 |
| Tue 31 Mar | £4.62 | £3.15 | £7.76 | £0.61 | 16.0 | 44.6 | 5.1 |
| Mon 30 Mar | £5.87 | £3.32 | £9.19 | £0.50 | 19.9 | 43.3 | 4.2 |
| Sun 29 Mar | £5.66 | £3.01 | £8.67 | £0.50 | 19.1 | 65.3 | 4.2 |
| Sat 28 Mar | £6.13 | £3.36 | £9.49 | £0.49 | 21.0 | 43.0 | 4.1 |
| Fri 27 Mar | £3.30 | £3.58 | £6.88 | £0.37 | 11.2 | 47.3 | 3.0 |
| Thu 26 Mar | £9.29 | £4.06 | £13.35 | £1.18 | 43.7 | 31.9 | 9.8 |
| Wed 25 Mar | £6.91 | £3.62 | £10.53 | £0.79 | 32.9 | 35.7 | 6.6 |
| Tue 24 Mar | £3.66 | £3.45 | £7.11 | £0.58 | 13.9 | 38.7 | 4.9 |
| Mon 23 Mar | £8.41 | £2.71 | £11.13 | £1.24 | 37.5 | 26.4 | 10.4 |
| Sun 22 Mar | £8.12 | £3.38 | £11.50 | £1.27 | 36.4 | 25.5 | 10.6 |
| Sat 21 Mar | £10.56 | £3.29 | £13.85 | £0.73 | 42.3 | 32.5 | 6.1 |
| Fri 20 Mar | £8.68 | £5.45 | £14.13 | £0.65 | 34.9 | 27.6 | 5.4 |
| Thu 19 Mar | £8.09 | £3.21 | £11.30 | £1.88 | 39.5 | 21.5 | 15.6 |
| Wed 18 Mar | £7.83 | £2.53 | £10.36 | £1.89 | 38.5 | 30.0 | 15.8 |
| Tue 17 Mar | £8.89 | £4.22 | £13.11 | £0.66 | 33.5 | 36.9 | 5.5 |
| Mon 16 Mar | £6.35 | £3.65 | £10.00 | £0.67 | 22.8 | 45.5 | 5.6 |
| Sun 15 Mar | £5.78 | £3.65 | £9.43 | £0.79 | 20.9 | 43.1 | 6.6 |
| Sat 14 Mar | £8.94 | £4.82 | £13.76 | £0.86 | 36.8 | 34.3 | 7.2 |
| Fri 13 Mar | £7.22 | £3.60 | £10.83 | £0.82 | 25.9 | 38.7 | 6.8 |
| Thu 12 Mar | £2.90 | £4.32 | £7.22 | £0.42 | 9.8 | 42.9 | 3.5 |
| Wed 11 Mar | £7.75 | £2.83 | £10.58 | £0.77 | 32.0 | 36.3 | 6.4 |
| Tue 10 Mar | £4.62 | £3.70 | £8.32 | £0.66 | 16.3 | 40.9 | 5.5 |
| Mon 9 Mar | £5.48 | £3.66 | £9.13 | £0.65 | 21.0 | 39.2 | 5.4 |
| Sun 8 Mar | £2.70 | £3.30 | £6.00 | £0.48 | 9.2 | 51.4 | 4.0 |
| Sat 7 Mar | £2.99 | £3.52 | £6.51 | £0.39 | 10.1 | 53.9 | 3.2 |
| Fri 6 Mar | £3.44 | £3.55 | £7.00 | £0.53 | 11.8 | 30.5 | 4.4 |
| Thu 5 Mar | £6.62 | £3.19 | £9.81 | £0.82 | 30.6 | 23.5 | 6.8 |
| Wed 4 Mar | £6.80 | £2.67 | £9.47 | £0.82 | 31.0 | 26.9 | 6.8 |
| Tue 3 Mar | £6.28 | £3.29 | £9.56 | £0.70 | 27.8 | 26.8 | 5.8 |
| Mon 2 Mar | £6.65 | £3.41 | £10.06 | £0.73 | 29.6 | 35.6 | 6.1 |
| Sun 1 Mar | £1.72 | £3.38 | £5.09 | £0.25 | 5.8 | 56.2 | 2.1 |
| Sat 28 Feb | £5.53 | £3.32 | £8.85 | £0.91 | 19.5 | 42.6 | 6.0 |
| Fri 27 Feb | £1.66 | £3.57 | £5.23 | £0.42 | 5.6 | 49.3 | 2.8 |
| Thu 26 Feb | £3.12 | £4.04 | £7.16 | £0.61 | 10.6 | 37.9 | 4.1 |
| Wed 25 Feb | £5.98 | £2.56 | £8.54 | £0.82 | 25.4 | 31.1 | 5.5 |
| Tue 24 Feb | £5.65 | £3.67 | £9.31 | £0.79 | 23.1 | 34.1 | 5.3 |
| Mon 23 Feb | £2.58 | £3.52 | £6.10 | £0.47 | 8.7 | 52.7 | 3.1 |
| Sun 22 Feb | £1.57 | £3.71 | £5.28 | £0.46 | 5.3 | 54.6 | 3.1 |
| Sat 21 Feb | £2.37 | £3.87 | £6.24 | £0.42 | 8.0 | 62.8 | 2.8 |
| Fri 20 Feb | £2.76 | £3.81 | £6.57 | £0.51 | 9.3 | 62.5 | 3.4 |
| Thu 19 Feb | £1.98 | £3.97 | £5.95 | £0.37 | 6.7 | 63.9 | 2.5 |
| Wed 18 Feb | £2.70 | £4.21 | £6.91 | £0.41 | 9.1 | 66.5 | 2.7 |
| Tue 17 Feb | £6.06 | £3.63 | £9.69 | £0.69 | 21.4 | 55.7 | 4.6 |
| Mon 16 Feb | £4.38 | £3.57 | £7.95 | £0.66 | 14.8 | 56.9 | 4.4 |
| Sun 15 Feb | £0.77 | £3.90 | £4.67 | £0.24 | 2.6 | 83.4 | 1.6 |
| Sat 14 Feb | £5.93 | £3.58 | £9.51 | £0.70 | 21.8 | 51.9 | 4.6 |
| Fri 13 Feb | £3.98 | £3.52 | £7.51 | £0.52 | 13.9 | 49.2 | 3.5 |
| Thu 12 Feb | £2.34 | £3.53 | £5.87 | £0.38 | 7.9 | 57.3 | 2.5 |
| Wed 11 Feb | £2.87 | £3.87 | £6.75 | £0.34 | 9.7 | 74.4 | 2.2 |
| Tue 10 Feb | £1.72 | £3.76 | £5.48 | £0.33 | 5.8 | 83.5 | 2.2 |
| Mon 9 Feb | £1.69 | £3.39 | £5.07 | £0.37 | 5.7 | 73.5 | 2.5 |
| Sun 8 Feb | £2.13 | £3.23 | £5.37 | £0.60 | 7.2 | 64.4 | 4.0 |
| Sat 7 Feb | £1.01 | £3.07 | £4.07 | £0.38 | 3.4 | 66.8 | 2.5 |
| Fri 6 Feb | £1.66 | £3.52 | £5.18 | £0.37 | 5.6 | 62.6 | 2.4 |
| Thu 5 Feb | £0.77 | £3.84 | £4.61 | £0.30 | 2.6 | 70.4 | 2.0 |
| Wed 4 Feb | £4.39 | £3.24 | £7.63 | £0.74 | 15.2 | 57.0 | 5.0 |
| Tue 3 Feb | £0.89 | £3.05 | £3.94 | £0.33 | 3.0 | 71.5 | 2.2 |
| Mon 2 Feb | £1.45 | £2.77 | £4.23 | £0.48 | 4.9 | 69.3 | 3.2 |
| Sun 1 Feb | £1.36 | £2.91 | £4.27 | £0.45 | 4.6 | 63.1 | 3.0 |
| Sat 31 Jan | £3.09 | £2.82 | £5.91 | £0.66 | 10.5 | 60.1 | 4.4 |
| Fri 30 Jan | £2.76 | £3.41 | £6.16 | £0.41 | 9.3 | 62.0 | 2.7 |
| Thu 29 Jan | £2.16 | £3.24 | £5.40 | £0.33 | 7.3 | 71.9 | 2.2 |
| Wed 28 Jan | £4.20 | £3.18 | £7.38 | £0.55 | 14.2 | 57.3 | 3.7 |
| Tue 27 Jan | £0.80 | £3.09 | £3.89 | £0.32 | 2.7 | 71.0 | 2.1 |
| Mon 26 Jan | £1.69 | £3.29 | £4.98 | £0.30 | 5.7 | 68.3 | 2.0 |
| Sun 25 Jan | £1.72 | £3.18 | £4.90 | £0.48 | 5.8 | 59.0 | 3.2 |
| Sat 24 Jan | £3.68 | £3.48 | £7.16 | £0.38 | 13.0 | 57.5 | 2.5 |
| Fri 23 Jan | £1.75 | £3.49 | £5.24 | £0.29 | 5.9 | 65.2 | 2.0 |
| Thu 22 Jan | £1.16 | £3.67 | £4.82 | £0.33 | 3.9 | 64.8 | 2.2 |
| Wed 21 Jan | £0.62 | £3.18 | £3.80 | £0.33 | 2.1 | 62.8 | 2.2 |
| Tue 20 Jan | £1.99 | £3.71 | £5.70 | £0.41 | 6.7 | 56.2 | 2.7 |
| Mon 19 Jan | £1.16 | £3.66 | £4.81 | £0.31 | 3.9 | 61.7 | 2.1 |
| Sun 18 Jan | £1.19 | £2.63 | £3.82 | £0.42 | 4.0 | 59.1 | 2.8 |
| Sat 17 Jan | £2.04 | £1.51 | £3.54 | £0.34 | 7.3 | 59.6 | 2.2 |
| Fri 16 Jan | £1.23 | £2.29 | £3.53 | £0.34 | 4.2 | 60.9 | 2.3 |
| Thu 15 Jan | £0.13 | £1.42 | £1.56 | £0.34 | 0.5 | 65.6 | 2.3 |
| Wed 14 Jan | £0.93 | £2.03 | £2.95 | £0.34 | 3.1 | 59.6 | 2.2 |
| Tue 13 Jan | £0.11 | £1.77 | £1.88 | £0.22 | 0.4 | 66.0 | 1.5 |
| Mon 12 Jan | £0.25 | £2.01 | £2.26 | £0.21 | 0.9 | 66.0 | 1.4 |
| Sun 11 Jan | £0.59 | £2.49 | £3.08 | £0.11 | 2.0 | 78.3 | 0.7 |
| Sat 10 Jan | £1.08 | £2.68 | £3.75 | £0.18 | 3.6 | 79.6 | 1.2 |
| Fri 9 Jan | £0.26 | £1.97 | £2.23 | £0.19 | 0.9 | 85.2 | 1.3 |
| Thu 8 Jan | £0.36 | £2.24 | £2.60 | £0.17 | 1.2 | 83.5 | 1.1 |
| Wed 7 Jan | £1.37 | £2.73 | £4.10 | £0.22 | 4.6 | 76.1 | 1.4 |
| Tue 6 Jan | £0.15 | £0.20 | £0.35 | £0.03 | 0.5 | 98.1 | 0.2 |
| Mon 5 Jan | £0.16 | £0.09 | £0.25 | £0.04 | 0.5 | 78.6 | 0.3 |
| Sun 4 Jan | £0.16 | −£0.08 | £0.07 | £0.07 | 0.5 | 86.9 | 0.5 |
| Sat 3 Jan | £0.30 | £1.79 | £2.09 | £0.19 | 1.0 | 74.6 | 1.3 |
| Fri 2 Jan | £0.39 | £1.52 | £1.91 | £0.17 | 1.3 | 85.5 | 1.1 |
| Thu 1 Jan | £1.27 | £2.40 | £3.66 | £0.24 | 4.3 | 66.1 | 1.6 |
Cumulative benefit
Running total across the selected window.
Inverter versus meter
The two measure at different points in the circuit and will never agree exactly. A few percent of drift is normal; a consistent double-digit gap means one feed is wrong and the solar/battery split should be treated with suspicion. The headline figures come from the meter either way.
| Day | Meter import | Inverter import | Drift | Meter export | Inverter export | Drift |
|---|---|---|---|---|---|---|
| Mon 31 Aug | 0.06 | 0.59 | 883.3% | 0.00 | 20.58 | — |
| Sun 30 Aug | 0.84 | 0.60 | -28.5% | 11.50 | 18.30 | 59.1% |
| Sat 29 Aug | 1.11 | 0.92 | -16.8% | 1.41 | 2.61 | 85.4% |
| Fri 28 Aug | 1.34 | 0.98 | -26.8% | 31.59 | 31.49 | -0.3% |
| Thu 27 Aug | 1.26 | 0.94 | -25.6% | 18.50 | 18.42 | -0.4% |
| Wed 26 Aug | 1.03 | 0.78 | -24.0% | 29.84 | 29.77 | -0.2% |
| Tue 25 Aug | 1.04 | 0.69 | -33.3% | 37.91 | 37.78 | -0.3% |
| Mon 24 Aug | 1.67 | 1.05 | -37.1% | 31.32 | 30.89 | -1.4% |
| Sun 23 Aug | 1.60 | 0.98 | -38.9% | 22.49 | 22.12 | -1.6% |
| Sat 22 Aug | 1.96 | 1.26 | -35.8% | 32.72 | 32.24 | -1.5% |
| Fri 21 Aug | 1.50 | 0.92 | -38.8% | 28.02 | 27.66 | -1.3% |
| Thu 20 Aug | 1.28 | 0.76 | -40.8% | 23.51 | 23.23 | -1.2% |
| Wed 19 Aug | 1.10 | 0.65 | -41.0% | 18.55 | 18.42 | -0.7% |
| Tue 18 Aug | 0.77 | 0.48 | -37.5% | 14.32 | 14.22 | -0.7% |
Return on investment
Measured across everything on record (7 Apr 2025 to 31 Aug 2026), not the range selected above — annualising a fortnight of summer would roughly double the apparent return. The yearly figure comes from the trailing twelve months, so it covers a full seasonal cycle.
Recovered so far
£4,118
of £18,990
21.7% recovered
£14,872 to go
Benefit per year
£2,743
Trailing 12 months
Annual return
14.4%
Of the £18,990 outlay
Full payback
5.4 yrs
Around Feb 2032