'Ökostrom' Isn't a Protected Word: How to Actually Tell Real Green Electricity From Marketing
The term Ökostrom isn't legally protected in Germany, which means a provider selling ordinary coal-generated electricity can legally buy Herkunftszertifikate, certificates of origin, from an unrelated renewable source like a Norwegian hydroelectric plant, retire them at the Umweltbundesamt, and then market that same coal-based electricity as green, a completely legal practice, and a genuinely common one. To actually find a tariff that funds real renewable expansion rather than just certificate-shuffling, look specifically for the Grüner Strom label, which has the strictest criteria and requires a real per-kilowatt-hour investment contribution (0.5 to 1 cent), or ok-power and ok-power-plus, with ok-power-plus specifically requiring a provider to certify their entire electricity supply, not just one tariff. A standalone TÜV seal is considerably weaker evidence on its own, since it typically checks only the origin certificates rather than whether the provider is actually funding new renewable capacity, look specifically for TÜV certifications that add qualifiers like 'EE-Ausbau' or 'Neuanlagenquote' before treating a TÜV label as meaningful. A new EU directive, the EmpCo Directive, takes effect in mid-September 2026 and will further restrict how loosely terms like 'environmentally friendly' can be used without backing from the EU Ecolabel.
The Official Rule
Choosing a genuinely green electricity tariff for your family sounds like it should be straightforward, and the marketing around it is designed to feel that way, but the actual regulatory reality behind the word “Ökostrom” is worth understanding before trusting the label alone.
“Ökostrom” is not a legally protected term in Germany. green-planet-energy.de’s explainer is direct about the consequence: a provider selling ordinary coal-generated electricity can legally purchase Herkunftszertifikate, certificates of origin, from an entirely unrelated renewable source, a Norwegian hydroelectric plant is the commonly cited example, retire those certificates at the Umweltbundesamt, and then market that same coal-based electricity as “green.” This isn’t a loophole or a rare abuse, it’s described as completely legal and genuinely common industry practice.
A handful of specific, reputable labels actually verify something meaningful beyond a certificate purchase. Polarstern Energie’s comparison and checkeverything.de’s 2026 guidance both point to the same two labels as genuinely trustworthy.
| Label | What it actually verifies |
|---|---|
| Grüner Strom label | Strictest criteria, guaranteed investment of 0.5-1 cent/kWh into renewable expansion, backed by BUND and NABU |
| ok-power | Genuinely reliable, somewhat more flexible, more certified tariffs available |
| ok-power-plus | Requires the provider's ENTIRE electricity supply to be certified this way, not just one tariff |
| Standalone TÜV seal | Often verifies origin certificates only, not renewable expansion, weaker on its own |
| TÜV with "EE-Ausbau" or "Neuanlagenquote" | These specific add-ons make a TÜV label meaningful for renewable expansion |
The Grüner Strom label carries the strictest requirements of the group. It requires a real, guaranteed investment contribution of 0.5 to 1 cent per kilowatt-hour specifically directed toward renewable energy expansion, and is backed by established environmental organizations including BUND and NABU rather than industry-run certification. Ok-power and its stronger variant, ok-power-plus, are also genuinely recommended, with utopia.de’s label comparison specifically noting that ok-power-plus is reserved for providers who certify their entire electricity supply this way, not just the single tariff being marketed to you, a meaningfully stronger signal about the company as a whole.
A standalone TÜV seal deserves more scrutiny, not automatic trust. TÜV certification often verifies only that a provider’s origin certificates are legitimate, without confirming whether any of that money is actually funding new renewable capacity. Look specifically for TÜV certifications explicitly labeled with additions like “EE-Ausbau” (renewable expansion) or “Neuanlagenquote” (new-plant quota), since a bare TÜV seal without these qualifiers is considerably weaker evidence of genuine environmental impact.
A new EU regulation is set to tighten this picture further. The EmpCo Directive (Directive on Empowering Consumers for the Green Transition) takes effect in mid-September 2026, and will restrict how loosely terms like “environmentally friendly” can be marketed without being backed by the EU Ecolabel specifically, a real, upcoming tightening of the greenwashing loophole described above.
What Real People Say
Environmental and consumer guides covering Ökostrom consistently describe the certificate-shuffling practice as one of the more genuinely surprising things families learn once they look past the marketing, several specifically use the same Norwegian hydro example to illustrate how a coal-heavy provider can legally claim green status without changing anything about the actual electricity reaching a customer’s home.
The consistent, practical advice across these guides is to stop evaluating tariffs by the word “Ökostrom” in their name entirely, and instead look specifically for the presence (or absence) of Grüner Strom or ok-power/ok-power-plus certification, treating a standalone TÜV seal or the word “green” alone as marketing rather than meaningful verification.
Step by Step
- Stop treating the word “Ökostrom” itself as meaningful, it isn’t legally protected and doesn’t guarantee anything about renewable investment.
- Look specifically for the Grüner Strom label or ok-power/ok-power-plus certification when comparing tariffs, these are the labels backed by real environmental criteria and guaranteed reinvestment.
- If a tariff only shows a TÜV seal, check for additional qualifiers like “EE-Ausbau” or “Neuanlagenquote” before treating it as strong evidence of genuine renewable funding.
- Prefer ok-power-plus over plain ok-power if you want confidence in the whole provider, not just the specific tariff being marketed to you.
- Watch for the EmpCo Directive’s effects starting mid-September 2026, as vague environmental marketing claims become more restricted going forward.
Compliance Note
This page explains the general framework around Ökostrom certification and labeling in Germany, current as of mid-2026. It is not financial or legal advice, and specific tariff terms and certifications can change. Confirm current certification status directly with the specific provider or the certifying organization before choosing a tariff.
FAQ & Common Pitfalls
So is 'Ökostrom' basically a meaningless label we shouldn't trust at all?
Not meaningless, but genuinely insufficient on its own. The word itself carries no legal weight or guarantee, so a tariff simply calling itself Ökostrom, without a specific, reputable certification behind it, doesn't tell you whether your money is funding new renewable capacity or just paying for a paper certificate transfer from an unrelated plant. The label matters far more than the word, look for Grüner Strom or ok-power specifically rather than trusting the marketing term alone.
What's actually wrong with buying certificates from a Norwegian hydro plant if the electricity is still genuinely renewable somewhere?
The core issue is that the electricity you're actually consuming often isn't from that renewable source at all, it's the same electricity from the same grid mix, including coal or gas, that everyone else on that grid gets. The certificate purchase and retirement is a separate paper transaction that lets the provider legally claim green status, but it typically doesn't fund any new renewable generation and doesn't change what's physically flowing to your outlet. This is precisely the greenwashing pattern the stronger labels are designed to screen out.
Between Grüner Strom and ok-power, is one genuinely better than the other for a family trying to make a real difference?
Both are considered genuinely reliable, reputable labels, backed by environmental organizations rather than industry marketing. Grüner Strom is described as having the strictest criteria and the highest guaranteed investment contribution per kilowatt-hour. Ok-power-plus is a specifically strong variant of ok-power, requiring the provider to certify their entire electricity supply this way, not just the one tariff they're selling you, which is worth checking for specifically if you want confidence in the whole company, not just your individual contract.
Should we specifically avoid any tariff that only has a TÜV seal?
Not automatically avoid it, but scrutinize it more closely than a Grüner Strom or ok-power label. A bare TÜV certification, without additional qualifiers, tends to verify only that the origin certificates are legitimate, not whether the provider is genuinely funding renewable expansion. Look specifically for TÜV certifications that explicitly add terms like 'EE-Ausbau' (renewable expansion) or 'Neuanlagenquote' (new-plant quota), since these additions are what actually make a TÜV seal meaningful for this specific question.