11 June 2026 · 2 min read
Unsolicited sales calls banned from 1 July, including for home batteries
By Stefan Douw · Maker of Stekkerkompas
From 1 July 2026, companies may no longer cold-call consumers to sell anything, not even their own current or former customers. The amendment to the Telecommunications Act was published in the official gazette via the Energy Act and closes the last gap in the telemarketing rules: sales calls are only allowed with prior, explicit consent. Only charities, lotteries serving a good cause, and publishers of newspapers and magazines keep an exemption.
Why this matters to battery buyers
Home batteries are exactly where phone sales have caused the most damage. In June 2025 the ACM, after hundreds of reports in six months, warned against misleading phone sales of home batteries, advising people to hang up or record the call. In March 2026 the regulator filed a criminal complaint with the Public Prosecution Service against a network of phone-based battery sellers operating under constantly changing company names. Victims thought they were signing for a non-binding quote and turned out to be locked into a purchase of tens of thousands of euros, often with a loan attached.
What exactly changes
Until now, companies could still call existing and former customers without consent, the so-called customer-relationship exemption. That disappears. After 1 July, any sales call without your explicit consent is by definition a violation. If you still get one about a home battery, you know straight away the caller ignores the rules, and that says enough about the offer.
Your rights if you already signed
Phone sales come with a 14-day cooling-off period in which you can cancel free of charge. If that period was not, or wrongly, communicated, it becomes a year. If you were misled during the call with false or incomplete information, you can void the contract, as if it never existed.
What it means for your purchase
A good battery purchase starts with you, not with a caller. Prices quoted on the phone are often far above market level. First compare what shops actually charge per size, then use the calculator to see what a battery earns in your situation, including the difference between a fixed and a dynamic contract.
Sources
Run the numbers for your home
Keep reading
9 Jun 2026 · 2 min read
End of net metering costs solar owners 172 to 539 euro a year
An Energievergelijk.nl analysis puts a number on the end of net metering from 2027: 172 to 539 euro a year, depending on your use and self-consumption.
6 Jun 2026 · 2 min read
Double energy tax on home batteries: parliament asks for a fix
In early June 2026 the Dutch parliament filed motions on the double energy tax and the VAT on home batteries. What is at stake and what it means for your return.
3 Jun 2026 · 2 min read
From 1 July 2026 households lose reserved priority on the grid
From 1 July 2026 grid operators allocate scarce capacity under a new ACM prioritization framework. What it means for a new or heavier connection.