
Husband, Dad, Wednesdayite & Energy Geek. Creator of @energystatsuk website & Twitter. £50 Octopus free credit: https://xitter.cf/t.co/0SlZq6q9Fs
Sheffield
Joined July 2009
- Tweets16K
- Following405
- Followers2.2K
- Likes14.9K
Mick Wall retweeted
New Energy Unwrapped Podcast Episode
What is Grid Flexibility with Pete Last from Axle Energy.
Get paid £1 per kWh during events.
Really enjoyed this chat. Happy to get back into podcast mode. More to come soon.
youtu.be/tTwsP7eNVOE
Mick Wall retweeted
Reports suggest heat pump grants could be cut to fund defence.
Why weaken a route away from gas and oil? What about homeowners, installers and UK manufacturing?
Should grants stay, shrink or be better targeted?
My take in the new video 👇
youtu.be/r05k5ZwrTZk
Mick Wall retweeted
Honoured to be nominated! 🤗
It's that time of year again. The Oscars of Open Source are back in their 7th year, in London.
Announcing @Openenergymon, @Raspberry_Pi, and @RepRapLtd have been shortlisted as finalists in the Hardware category of The OpenUK Awards, sponsored by @lowRISC.
We’ll celebrate the shortlist and announce the winners, taking place on 5th November at our annual Black Tie Gala Dinner and Awards ceremony at the House of Commons.
Shortlisted nominees, our sponsors and volunteers will be invited to join this event. Tickets are not sold, and the evening is made possible by the generosity of our sponsors: @RedBadgerTeam, @lowRISC, @ODIHQ, @controlplaneio, @Arm, Iain G. Mitchell KC, @Uber, @nolabs_ai, kioko, and @openxchange.
See the full shortlist: openuk.uk/awards/
Me again. This time, like some sort of investigative journalist. 😆
Could electricity tariffs eventually be priced by device?
The newer Intelligent @OctopusEnergy Go API now separates home & EV rates with new & different endpoints.
Could it point towards EV, heat pump, battery & home all having different prices?
youtu.be/LLmKa1V9rvI
Mick Wall retweeted
National average pricing for Octopus Energy Agile Tariff: Fri 09-10-2026
Min: 2.7p (14:00)
Max: 29.6p (18:30)
Avg: 11.4p
Avg Excl Peak: 9.5p
Peak 4pm-7pm: 24.1p
Get graphs & pricing for all 14 UK regions at energy-stats.uk/octopus-agil…
Mick Wall retweeted
National average pricing for Octopus Energy Agile Tariff: Sun 04-10-2026
Min: 6.6p (12:30)
Max: 51.6p (18:30)
Avg: 28.0p
Avg Excl Peak: 25.0p
Peak 4pm-7pm: 47.9p
Get graphs & pricing for all 14 UK regions at energy-stats.uk/octopus-agil…
Might be one fo you @sarah_go_green and other folks on Gas Boilers looking to potentially save some money on your bills. 👍
New video looking at a really simple question:
Does turning your boiler flow temperature down actually save money?
I explain what flow and return temperatures are and why it's the temperature of the water coming back to the boiler that matters.
youtu.be/pegUvCXapU8
Mick Wall retweeted
National average pricing for Octopus Energy Agile Tariff: Sun 27-09-2026
Min: -2.5p (11:30)
Max: 48.4p (18:30)
Avg: 20.3p
Avg Excl Peak: 17.2p
Peak 4pm-7pm: 41.4p
Get graphs & pricing for all 14 UK regions at energy-stats.uk/octopus-agil…
Mick Wall retweeted
Heat pump vs oil boiler.
Same house. Same 12,000 kWh of useful heat.
Oil at 85% efficiency.
Gas at 85%.
Heat pumps at COP 3.0, 3.5 and 4.
One of the results is much closer than you might expect.
Mick Wall retweeted
National average pricing for Octopus Energy Agile Tariff: Sat 26-09-2026
Min: 1.6p (13:30)
Max: 51.3p (17:30)
Avg: 26.7p
Avg Excl Peak: 23.7p
Peak 4pm-7pm: 46.2p
Get graphs & pricing for all 14 UK regions at energy-stats.uk/octopus-agil…
Mick Wall retweeted
New Video:
Oil boiler vs heat pump, using the same 12,000 kWh of useful heat.
At today’s prices:
Oil 85%: £1,364
Gas 85%: £1,130
Heat pump
SPF 3: £1,053
SPF 4: £790
The real comparison is the cost of useful heat, not the headline fuel price.
youtu.be/SKgBTioDoUo
Mick Wall retweeted
I changed 9 radiators when my heat pump went in.
It helped me get down to lower flow temperatures and my 2025 heating COP was 4.2.
But would I change all nine again?
Probably not.
There's a cost to chasing the difference between a good COP and a really good one.
I love pouring over the data for deep dives like this. 😍
I changed nine radiators when my heat pump went in.
Looking back, I’m not sure I needed to.
Using my 2025 data, dropping from COP 4.2 to 3.5 would only add about £87/year. That changes how you think about bigger radiators, upfront cost and chasing COP.
youtu.be/KfBJ3zOb0w0
Mick Wall retweeted
National avg pricing for Octopus Energy Tracker Tariff (SILVER-26-04-01)
Recent Prices
Sat 19 Sep, Elec:13.93p, Gas:9.93p
Fri 18 Sep, Elec:24.07p, Gas:9.72p
Thu 17 Sep, Elec:25.46p, Gas:9.71p
Get graphs & pricing for all 14 UK regions: energy-stats.uk/octopus-trac…
Mick Wall retweeted
Another opportunity for those working on roofs or working towards that to safely learn alongside those who already do it!
We also have people coming on projects to gain further confidence with some amazing feedback.
The aim is to see other providers change course and be inspired towards our methods. Its working and I love that.
Get booked on at the only training provider in the UK doing things like this. Community and collaboration from installers, manufacturers and trainers.
a121.co.uk/courses.php
Mick Wall retweeted
National average pricing for Octopus Energy Agile Tariff: Thu 17-09-2026
Min: -2.0p (12:30)
Max: 48.5p (18:30)
Avg: 21.7p
Avg Excl Peak: 19.1p
Peak 4pm-7pm: 39.0p
Get graphs & pricing for all 14 UK regions at energy-stats.uk/octopus-agil…
Mick Wall retweeted
My average electricity import rate across the year was under 10p/kWh.
Not because of one tariff.
IOG + battery + solar + Predbat + Havenwise + behaviour.
The number I care about is what the whole setup actually delivered: the blended rate.
youtu.be/IgHXFsKqrHM
Mick Wall retweeted
Ten years ago, electricity cost me more than 5× as much per kWh as gas.
That relationship has changed.
And once you stop comparing raw fuel prices and compare the cost of useful heat instead, the picture changes again.
Full video on YouTube.
youtu.be/hS9kq21VKcM
Mick Wall retweeted
I found my EDF bill from April 2016.
Gas: 1.99p/kWh.
Today we're heading towards 8p.
That change is a big part of why the old assumption that gas must always be cheaper for heating doesn't necessarily hold anymore.
Mick Wall retweeted
Heat Pump vs Boiler: Which Is Cheaper to Run?
Using @OctopusEnergy tariff pricing and data from 244 heat pumps on @Openenergymon (heatpumpmonitor.org)
Forget the Spark Gap, it's all about the Unit Cost of Useful Heat. 👍
youtu.be/aZ7P8-0aU3s












