The videos
Each video comes with the article where its numbers were checked, sources attached. Whatever passes by in the video, you can read back and verify here.
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What types of home battery are there? All 6, from small to large
150 watt-hours and 13,500. Both store electricity at home, with a factor of ninety between them. In between sit six categories, and each one exists because the previous one runs into a wall. All six written out: what each category adds, where it stops, what the kilowatt-hours cost, and which connection it needs.
August 17, 2026 · 33 min read
How does a home battery work? The whole route, from your roof to your kettle
A hundred kilowatt-hours go in. Eighty-five come out. Those fifteen did not disappear. This is the full route one kilowatt-hour takes from your roof to your kettle, with the arithmetic included: why a solar panel cannot produce anything but DC, why a plug-in battery sits at 48 volts while a fixed installation does not, and the four places where that fifteen percent leaves as heat.
August 12, 2026 · 28 min read
Trading with a plug-in battery: it works, just not where your salesperson thinks
Salespeople say a plug-in battery can't trade. That's true for one of the three meanings of that word, and not for the other two. Here's which brands you can control locally, why your energy supplier is the real bottleneck, and why a cheap hour can still cost you money — with the 590-day backtest that backs it up.
August 7, 2026 · 18 min read
Plug-in batteries lead the Dutch market. And nobody is counting them.
Almost 90,000 home batteries were added in the Netherlands in 2025. More than half of new sales are now plug-in units, and a large share of those appear in no official register at all. Not because they are exempt: reporting is mandatory, below 800 watts too. Here are all the numbers, all the sources and the calculation most sellers skip.
August 3, 2026 · 25 min read
From ThuisbatterijNederland to Jay's Desk: what 151 videos and 1.7 million views taught me
For two years I made the videos for ThuisbatterijNederland. 151 videos, 1.7 million views. We're parting ways, and before moving on I laid all the numbers side by side. What came out of that I hadn't expected.
August 1, 2026 · 12 min read
From the archive
These sit on ThuisbatterijNederland, the channel I used to present for. The article underneath is from here.
This home battery mistake costs you EUR 2,200 (and almost everyone makes it)
Bigger home battery = longer lifespan? Science says otherwise. With scientific papers, concrete calculations, and the EUR 2,200 you could save.
May 24, 2026 · 29 min read
End of the net metering scheme 2027: what you need to do now
The Dutch net metering scheme (salderingsregeling) ends on 1 January 2027. What does that actually mean for your wallet, and what steps can you take right now? A comprehensive overview with timeline, worked examples and concrete actions.
May 23, 2026 · 24 min read
Is a home battery worth it in 2026? The honest answer
The honest math behind home batteries in 2026. When will you earn back your investment, when won't you, and which factors make the difference? With concrete scenarios and current prices.
May 23, 2026 · 25 min read
Home battery too big? This costs you thousands of euros (the honest explanation)
Most people buy a home battery that's too large -- not because they're foolish, but because the information they get is wrong. Here's the full explanation with numbers, sources, and the math that salespeople would rather skip.
May 23, 2026 · 19 min read
Home batteries from China: what most people don't realize
Nearly every home battery in the Netherlands contains Chinese cells. But what does that actually mean? A deeper investigation into the supply chain, the real costs of importing yourself, and why the answer is more nuanced than 'Chinese = bad'.
May 23, 2026 · 20 min read