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Perfect Solar Days
Friends, March may have been depressingly dull, but the start of April has been upliftingly sunny. And Tuesday April 4th was a perfect solar day. Perfect solar days are days in which the sun shines...
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Hydrogen for Home Heating is a Scam.
Friends, you may have heard that using hydrogen for home heating is somehow a ‘green solution’ to the question of how we should heat our homes in the future. This is not the case, but fossil fuel...
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The Economics of Home Solar PV
Friends, you may find this hard to believe, but someone posted something incorrect on Twitter the other day. They suggested that home installations of solar PV will soon become uneconomic. I commented...
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Hydrogen in the UK
Isambard Kingdom Brunel Friends, on Monday I visited a Brunel University Hydrogen Event. This meant getting up(!) and travelling far beyond the borders of Teddington on TWO buses – so when I arrived in...
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Solar PV and Batteries: My home and your home
Friends, “Hello again!” You may have been wondering why it’s been such a long time since I have written a blog article, and the answer is that after the Cheltenham Talk at the start of June, I went on...
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Heat Pumps versus Hydrogen Boilers: Costs
Friends, I was upset this week by a really poor programme about heat pumps on BBC TV. (This is a link which should work in the UK until July 2024). What upset me was that they discussed the idea of...
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Worrying Nonsense from Octopus.
Friends, regular readers may remember that back in January, Octopus Energy sent me a bill for approximately £1,600 too much. The issue was quickly resolved, but it still seemed very poor that checks...
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2023: 5 months ‘off-grid’
Sign outside my house Friends, as we approach the autumnal equinox, the summer harvest of solar energy is drawing to a close. Yesterday, 19th September 2023 marked 153 days ‘off-grid’, but since...
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What happens when you switch on the light?
Friends, after – frankly – struggling with the last article on the carbon emissions associated with time-shifting consumption using batteries, two correspondents immediately responded with probing...
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Powerwall Battery Degradation: Winter#3
Friends, as you are no doubt all aware: everything is getting worse. But the other day I noticed that one thing in particular was not getting worse quite as quickly as I had expected: the nominal...
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