March Electricity:
I managed to maintain a 4.87% Peak/Off-Peak ratio, compared to 24.02% in 2025 (I had not yet bought my 4th battery at this point).
Much of the month was overcast, and/or had minimal sunshine, but an average UK March.
Electricity costs for the month of March: £115.61 for 2026, £148.86 for 2025.
Electricity demand for the month of March: 1561Wh for 2026, 1715kWh for 2025.
The cost for this year was around £33.25 less for 154kWH less usage.
The off-peak/peak/SC values for March were £0.07/0.29198/0.47704 for 2026 vs £0.07/£0.27102/0.4879 for 2025, peak is slightly up, but the standing charge is down (same as last month).
This can also be seen in the month on month usage vs cost graphs where my usage is about the same, however my costs have gone down significantly each year:
Ecoflow batteries:
I finally managed to return my faulty EcoFlow battery and receive the replacement, which is now installed in my loft space, powering my loft rack, just like the office one, there is more draw than the battery alone can provide in a 24 hour period, so it never back feeds into the house.
The graphs show a total of 366kWh (348 + 18) of usage, 140kWh (132 + 8) of which came from the batteries and 225kWh (215 + 10) came from the ‘grid’ after the batteries were exhausted.
This means that I have moved an additional 140kWh of usage from peak to off-peak or £31.08 (140 * (0.29198 – 0.7)) of additional savings not captured elsewhere, this should ideally be added to the demand figure above, taking it to 1701kWh
The drop in usage in the first graph from the 14th onwards was as a result of me switching from mo old iMac Pro to a new M3 Ultra Mac Studio with a second LG monitor.
March Solar:
Actual production for March exceeded the forecast but not necessarily by very much.
The various arrays produced the following levels of energy: Garage 193.67kWh, Office 155.95kWh, East 104.37kWh, West 130.40kWh for a total of 584kWh, this compares to 713kWh for March 2025, so down on last year once again.
Whilst I produced less than last year, I managed to export 248kWh compared to 84kWh in 2025, for a total saving of £29.80, more than doubling last year’s figure of £12.58.
This despite the guaranteed export (SEG) price dropping from £0.15 to £0.12 per kWh from the 1st of March.
This is largely due to the extra batteries, allowing me to make it through most days without drawing any peak electricity and thereby allowing me to export more solar and also empty my Enphase batteries at the end of the day.
The import costs of £115.61 less the export savings of £29.80 means my net cost for March was £85.81 for 1701kWh of demand making my average rate £0.0504/kWh.
March Gas:
I turned the heating off several times during the month, only having to turn it back on again a few days later.
Overall a relatively mild March, my cost was up on last year, £139.66 vs £100.82, but so was my usage, 1642kWh vs 1797kWh, the average cost per kWh was up at 0.0727 as compared to 0.0550 in 2025, war in the Middle East, has been having an adverse effect on the gas prices.
Gas costs:
