energie

14 articles

Feed-in compensation 2027: what your solar surplus is worth at midday

Dutch net metering ends on 1 January 2027, and a lot of people expect a penalty on the power they export. That penalty is not coming. What is coming has been sitting in the market's own price list for six years: exactly €0.00 is the single most common electricity price of the year. This is the full dossier, with the measurement, the 401 price bins, the 2027 figures two suppliers publish themselves, and the point where my explanation runs out.

August 30, 202636 min read

Controlling a home battery: what each brand lets you read, and what it lets you write
Almost every home battery lets you watch. A much smaller number lets you change anything. This is the full dossier behind the video: the endpoint or register per brand, the firmware version it applies to, the verification date, and the arithmetic that shows why an 800-watt setpoint rarely pulls 800 watts out of your battery.
August 24, 202623 min readResearch
Waiting for the sodium battery? 2027 is a bet on the lithium price
Salt is everywhere and costs almost nothing, and yet there is no sodium battery on your wall. This is the full dossier behind the video: why the year 2027 comes from trade blogs rather than research, what 'parity' actually means in the only peer-reviewed study on the question, and how one expired mining permit in Jiangxi flipped the headlines in four trading days without anything changing about sodium.
August 20, 202626 min readResearch
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, 202633 min readGuide
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, 202628 min readGuide
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, 202618 min readResearch
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, 202625 min readResearch
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, 202612 min readResearch
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, 202629 min readResearch
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, 202625 min readGuide
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, 202625 min readResearch
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, 202619 min readResearch
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, 202620 min readResearch
Review
Zendure SolarFlow 2400 PRO & AC+ review: the technical deep-dive
The comprehensive technical review of the Zendure SolarFlow 2400 PRO and AC+. With efficiency test results, thermal measurements, and an honest comparison -- including the data that didn't fit in the video.
May 23, 202624 min readReview

energie

Feed-in compensation 2027: what your solar surplus is worth at midday

Controlling a home battery: what each brand lets you read, and what it lets you write

Waiting for the sodium battery? 2027 is a bet on the lithium price

What types of home battery are there? All 6, from small to large

How does a home battery work? The whole route, from your roof to your kettle

Trading with a plug-in battery: it works, just not where your salesperson thinks

Plug-in batteries lead the Dutch market. And nobody is counting them.

From ThuisbatterijNederland to Jay's Desk: what 151 videos and 1.7 million views taught me

This home battery mistake costs you EUR 2,200 (and almost everyone makes it)

End of the net metering scheme 2027: what you need to do now

Is a home battery worth it in 2026? The honest answer

Home battery too big? This costs you thousands of euros (the honest explanation)

Home batteries from China: what most people don't realize

Zendure SolarFlow 2400 PRO & AC+ review: the technical deep-dive