Earth Notes: Saving The Planet @ Home

Want to do your bit at home to improve your quality of life, save money, cut down on waste and carbon pollution, and get the planet back how it used to be?

Did you know that the majority of your neighbours are undertaking energy saving actions every day? That is also one of the most powerful messages to encourage people to save.

This site is mainly about the practical steps that I have taken to make my own life (and that of my family) a little better and lower-carbon. Many of them are actions that you could take too...

Featured:

Even More Enphase AC Battery Home Storage (2021-10-28) (microgen)

And then there were four! #storage #grid #selfConsumption

That escalated quickly! Doubled AC-coupled storage again 2021-10-28 to ~5kWh/1kW when I took up the offer of two second-hand units: reuse rocks!

New:

On Website Technicals (2025-04) (blogsitetech)

16WW Microgeneration Merit Order (microgentech)

Bats Around our Home aka 16WW (2025) (datasetresearchshort)

⭐ Most Read

OpenTRV Archive Material and Sources (researchtech)

On Setting Up a Raspberry Pi Off-grid PV-Powered Server (2014) (frugaltech)

RSS Podcast Feed Inefficiency (datasetfrugalresearchtech)

Updated:

Even More Enphase AC Battery Home Storage (2021-10-28) (microgen)

Towards a Real LZC Low/Zero-Carbon UK Home (2007) (microgen)

UK Wet Heating Retrofit PhD Research (frugalresearchtech)

Random:

On Website Technicals (2023-11) (blogsitetech)

Tech updates: GSC Dataset pickiness, Zenodo DOIs, microSDVC card prep and f3, CrowView, public data archive.

At 16WW over 14 days from 2025-03-24 to 2025-04-07: electricity import 0.7kWh/d (net -4.6kWh/d).

At 16WW over 371 days from 2024-04-01 to 2025-04-07: electricity import 4.3kWh/d (net 0.4kWh/d), gas consumption 0.4kWh/d.

Net utility (electricity) CO2 emitted this year over first 3 months: 126kg

LIVEGB Grid Carbon Intensity (mobile), live grid-tie PV generation and off-grid PV electrical system stats, heat battery top-up control.

Main FEEDS site, podcast, data. SECTIONS dataset, frugal, microgeneration, podcast, research, review.

OFFLINE Download to your computer before a long journey with poor connectivity. Unpack and read offline. (Also see Zenodo.)

Thanks so much for taking the time to do this detailed writeup. Fascinating and informative as ever! PF, UK.

This a really good resource - thank you for making it.... site looks just great..., SJ, US.

It's a tour de force with all the thought processes and step by step explanations! Enjoyed the MVHR which often seems a badly explained topic..., NSM, UK.

Keep up the great work, thanks, PK, UK.

Thanks for all you've shared! RT, UK.

I've really enjoyed reading your blog. MJF, UK.

Liked the podcast - well presented - thank you! TW, UK.

Just listened to the podcast - very well put! Excellent! SD, UK.

Thanks for your amazing information and grid intensity website. PH, UK.

I've been following your site for years now. GT, UK.

I've been looking through your website, I'm amazed at how much information there is on it! And great achievements with your Zero Low Carbon home. RS, UK.

Good on ya for your efforts and interesting website. RP, US.

What [a] great resource!!! TE, UK.

I've found the info and articles at earth.org.uk really useful - thanks. TK, UK.

Love what you are doing and the fantastic data sets you have made available. Well done! RF, US.... You have inspired me to get Solar panels. PF, UK.

I recently stumbled across your quite fantastic website... AE, UK.

I've been reading your site for the last couple of years and think it is excellent. PF, UK.

Thanks for your wonderful website - I look at it a lot. A, UK.... thanks again for your great site, I look forward to reading the rest of it and learning even more. JM, UK.

It's very refreshing to see something that outlines the benefits, drawback[s] and the options in such a non-judgemental way... JS, US.... some very useful & interesting info... GR, UK.... a great resource when it comes to cutting your power consumption. MS, UK, via Twitter.

This is a fantastic comprehensive site. I have found a whole load of interesting stuff from it. JC, Wales.

We've crunched our carbon footprint. We've become a SuperHome. We've pondered other changes that we might make. But most of all there's been quite a lot of fun learning. Maybe it is my engineering mindset, but I have made a hobby out of conservation and meter watching. I have had fun out of 'tuning' life a little. The rest of my family humours me!

See a full list of articles under search at the top of the page, and here's some actions to start with that we took...

• made my home study/office carbon-neutral including reducing energy consumption from my Internet-facing servers at home from over 600W to about 2W
• switched our electricity supply to a "100% green" tariff with Ecotricity so that what we do consume is as green as possible
• cut our electricity consumption and added grid-tied solar PV microgeneration to the point where we are net exporters to the grid
• weatherproofed/weatherised our home amongst our other conservation measures such as using (OpenTRV) thermostatic radiator values and aerogel insulation and upgrading to energy-efficient appliances
• built a little off-grid solar system that provides lighting and mobile phone charging and power for my Internet servers consolidated onto a single Raspberry Pi that postpones work until the sun shines
• toyed with wind power (turbines) and found that wind does not really work for most of us urbanites
• built a compost heap or three and we grow a tiny amount of veg in our postage-stamp garden...

Effective changes that can be made at home are based on lowering energy/resource demand...

Saving electricity (and gas) in all sorts of ways, including,

• Lighting: low-energy light bulbs (eg CFL/ compact fluorescent and LED preferably at 60 lumens per Watt (60lm/W) efficiency or better). If rewiring, then look at 12V light circuits connecting to PV/battery systems.
• High-efficiency white goods (eg fridges) and other electrical goods at home and at work. Look at energy consumption in use, eg per wash or while on, and in 'standby' mode if you won't be turning them off at the wall.
• Choose an energy supplier that provides 'green' energy and supports renewables.
• For cooking: investigate CO2 savings with induction cookers and microwave ovens.
• Clothes washing: alternate ideas with drying (eg on a line), and low-temperature (cold/30°C/40°C) washing and do full loads. Also, simple changes in habits and textiles (wool is brilliant compared to cotton for whole-life costing as well as washing/drying/ironing). Re-use fashions!
• Low water-use toilets, showers.
• Insulation and thermal capacity (over-cladding buildings).
• Close curtains at dusk to retain heat (and on hot sunny days to keep the sun/heat out).
• Turn down your heating thermostat 1°C for up to 10% saving. 18°C to 21°C is about right during the day (and hypothermia is only really a risk when temperatures at home are as low as 5°C, but spending more than two hours at 12°C raises blood pressure), and nearer 14°C at night when sleeping.
• Only heat rooms that you are using. Use a timer (or something smarter) to avoid heating when no one is home!
• Wearing the right clothing helps keep you comfortable at lower temperatures.
• Don't have your hot water thermostat set higher than 60°C/140°F, and 'instant' water heaters avoid losses from a tank for new systems.
• Don't leave gadgets and appliances on standby/charging, turn them off (maybe with a smart power-strip or trailing adapter) or unplug them. You might trim as much as 30% off your electricity bill.
• Check your main electricity use at home with tools such as the Kill-a-Wattmeter, or just read your supply meter daily or weekly. Gas too.
• Minimize the electricity you use at times of peak grid load (eg 4pm to 9pm in the autumn/winter in the UK) since more carbon-intensive and expensive fuels may be burnt in 'peaking' plants, and the grid is under most strain too. Intensity at peak time circa 2009 was ~0.6kgCO2/kWh, as much as 50% over typical levels.
• On the flip-side, make good use of energy when it's abundant such as saving up computing work until the sun is shining for low-carbon results.
• Reduce, re-use, recycle (including electricals). See some thoughtful tips at MoneySavingExpert.com.

2025-04-07: North of Scotland electricity network to have £450m upgrade... by the end of the decade... The whole system at distribution level, which is what goes into homes and businesses, will be refurbished and refreshed.

2025-04-03: Largest ever UK pumped hydro scheme granted consent: 1.8 GW / 40 GWh pumped hydro project [at Loch Earba] in the Scottish Highlands.

2025-04-01: according to GB NESO, On 1 April between 12:30 – 1pm, solar generated 12.569GW, the highest amount since records began. And: On 6 April at 12pm, solar generation reached a record high of 12.68GW, just five days after the previous high of 12.57GW.

2025-03-12: Analysis: UK emissions fall 3.6% in 2024 as coal use drops to lowest since 1666: ... emissions fell to just 371m tonnes of carbon dioxide equivalent (MtCO2e) in 2024, the lowest level since 1872.

2025-03-06: Europe's largest battery, located in UK, begins operations: The largest battery site in Europe has commenced operations in the UK. The 200MW/400MWh Blackhillock site in Moray, Scotland, is now live, with a further 100MW scheduled to come online in 2026, making a total of 300MW/600MWh.