Stadtwerke Karlsruhe review

Updated September 30, 2026 · TariffCue Editorial Team · Facts checked September 30, 2026

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Our verdict

Stadtwerke Karlsruhe suits households in and around Karlsruhe who want a local municipal supplier with a wide tariff spread and full fibre in the same family. Unit rate of €0.34 and a standing charge of €16.68 are not the sharpest on our data.

Key facts

Best for
Karlsruhe households wanting local electricity and gas plus full fibre broadband under one municipal roof.
Fixed terms
24 (Source, checked September 30, 2026)
Unit rate
€0.337 (Source, checked September 30, 2026)
Standing charge
€16.68 (Source, checked September 30, 2026)
Renewable share
100% (Source, checked September 30, 2026)
Renewable basis
Certificates (Source, checked September 30, 2026)
Smart meter required
Yes (Source, checked September 30, 2026)
Regions served
Karlsruhe (Source, checked September 30, 2026)
Customers
140,000 (Source, checked September 30, 2026)
Markets
DE (Source, checked September 30, 2026)
Legal entity
Stadtwerke Karlsruhe GmbH (Source, checked September 30, 2026)
Headquarters
Germany (Source, checked September 30, 2026)
Support channels
Phone, Help-centre, Email (Source, checked September 30, 2026)
Tariff types
Variable, Fixed, Dynamic, Time of use, Ev, Green
Fuels
Electricity, Gas
Official website
stadtwerke-karlsruhe.de

Broadband

Top download speed (Mbps)
1,000 (Source, checked September 30, 2026)
Upload speed (Mbps)
1,000 (Source, checked September 30, 2026)
Price from
€19.99 (Source, checked September 30, 2026)
Reference plan prices
Highspeed: EUR 19.99 per month then 44.99, 300 Mbps, 24 months; Megaspeed: EUR 39.99 per month then 64.99, 600 Mbps, 24 months; Gigaspeed: EUR 64.99 per month then 89.99, 1000 Mbps, 24 months (Source, checked September 30, 2026)
Setup fee
€69.99 (Source, checked September 30, 2026)
Price after contract
€44.99 to €89.99 (Source, checked September 30, 2026)
Router
Premium-Router optional, FRITZ!Box (Source, checked September 30, 2026)
Address checker
https://www.stadtwerke-karlsruhe.de/de/pk/ka-glasfaser/lp/ka-glasfaser-bestellung.php (Source, checked September 30, 2026)
Markets
DE (Source, checked September 30, 2026)
Legal entity
Stadtwerke Karlsruhe GmbH (Source, checked September 30, 2026)
Headquarters
Germany (Source, checked September 30, 2026)
Support channels
Phone, Help-centre, Email (Source, checked September 30, 2026)
Technology
Fttp
Contract length
24

Apps and profiles

Get the app
Google Play
Elsewhere
WikidataXLinkedIn

Pros and cons

Pros

  • Tariff choice covers variable, fixed, dynamic, time of use, EV and green, which is a wider spread than the fixed, time of use and EV line-up at fixed, time of use and ev.
  • Fixed terms run 24 months, longer than the monthly contracts most suppliers in our data carry.
  • Renewable share of 100% rests on certificates, so anyone who wants a documented green mix has a stated figure to read.
  • Support runs through phone, help centre and email, including a help centre as well as phone and email.

Cons

  • Unit rate of €0.34 ranks 19 out of 23 on our data, so heavy users pay more per unit than the cheapest suppliers listed.
  • The standing charge of €16.68 sits at 11 out of 16, which matters most for low consumption households.
  • Renewable supply of 100% is backed by certificates, where own generation accounts for 21.7% of the market.
  • Electricity and gas are limited to DE, so anyone outside that market has no local option here.
Stadtwerke Karlsruhe

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Scored 8.7 / 10 by TariffCue.

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Who it suits

  • Households in Karlsruhe who want one supplier for electricity, gas and full fibre.
  • EV owners and heat pump users looking for EV and time of use tariffs from the same provider.
  • Anyone who prefers a municipal company, given Stadtwerke Karlsruhe GmbH operates under German rules with its base in Germany.

Who should look elsewhere

  • Households far from Karlsruhe, since supply is limited to DE.
  • Buyers chasing the lowest unit rate, since €0.34 ranks 19 on our data.
  • People who want a prepaid option, absent from variable, fixed and dynamic here but listed by fixed, ev and time of use.

How it compares on our data

On the two measures readers usually check first, Stadtwerke Karlsruhe sits in the middle rather than at either end. Its unit rate of €0.34 places it at 19 out of 23 suppliers in our data, and the standing charge of €16.68 places it at 11 out of 16. For a household using a lot of power, that unit rate position is the number to weigh. For a household using little, the standing charge position matters more, and neither of these two figures leads the list. The overall picture is a dependable middle position: present on both rankings, outside the cheapest places on both, and useful mainly for people who already live in its patch.

Plans and prices

The published rates sit on the Grundversorgung plan: a unit rate of €0.34 and a standing charge of €16.68. Fixed terms run 24 months, so a fixed deal is a genuine two-year commitment rather than a short lock-in. Tariff types include variable, fixed, dynamic, time of use, EV and green, so the price you get depends on which of those you pick rather than on one rate card. Suppliers like Powerpeers, whose types are listed as dynamic, fixed and variable, and Endesa, listed at fixed, time of use and ev, show narrower lines. For anyone who can shift usage away from peak times, a dynamic or time of use option is where the savings sit, since the standing charge and the unit rate both keep applying either way.

Core features

The electricity mix is 100% renewable, backed by certificates rather than by generation on its own account. A smart meter is required for the flex tariff, which is the condition for the most usage-driven pricing but adds a fitting step. Stadtwerke Karlsruhe serves 140,000 customers, the kind of scale that comes from being the local municipal utility rather than a national challenger. Fuel cover spans electricity and gas, so a single meter relationship can handle both. The tariff list also includes EV and green options, which means a charger owner can pick charging pricing without leaving the supplier.

The company behind it

The supplier is Stadtwerke Karlsruhe GmbH, a municipal company based in Germany. That structure is the main reason to expect local knowledge of the grid and of regional conditions, and it is the closest thing to a stability guarantee on offer. Support runs through phone, help centre and email, which includes a phone line, a help centre and email. Alongside electricity and gas, the same company runs a full fibre broadband service, so a household in the network area can take power and internet from one counter and one bill. Anyone weighing the company itself rather than the rates should weigh that municipal anchor alongside the price position.

How Stadtwerke Karlsruhe compares

Where Stadtwerke Karlsruhe is available

Available
Germany

Countries from the brand (Source, checked September 30, 2026)

Frequently asked questions

What does electricity from Stadtwerke Karlsruhe cost per unit?+

The unit rate is €0.34 and the standing charge is €16.68. Together they set the bill, with the unit rate carrying the weight for heavy users and the standing charge carrying more of the load in a small home. Both sit in the middle of our data, which is worth checking against your own usage before you commit.

How long is the commitment on a fixed tariff?+

Fixed terms run 24 months. That is a longer lock-in than the short monthly contracts common in the wider market, so it suits a household that expects to stay put. Variable and dynamic options avoid a long commitment at the cost of following the market.

Where can I get supply from Stadtwerke Karlsruhe?+

Supply is limited to DE, and the areas served are Karlsruhe. The company is registered as Stadtwerke Karlsruhe GmbH with its base in Germany. Anyone outside that market will need a different supplier, however the tariff list looks on paper.

How clean is the electricity mix?+

The renewable share is 100%, and it is backed by certificates rather than by generation on the company's own account. The certificate route is a common one in the market, so read the percentage as a stated mix rather than as proof of local generation.

What kinds of tariff can I choose?+

The list covers variable, fixed and dynamic. That means you can pick a variable rate, a fixed deal, a dynamic price, a time of use schedule, EV charging pricing or a green option. Suppliers such as Endesa offer fixed, time of use and ev, a shorter list, so the range is a reason to look here.

Is a smart meter needed?+

A smart meter is required for the flex tariff. It is what allows usage to be measured in detail and priced by time, so the dynamic and time of use options depend on it. Other tariffs in the list do not carry that condition.

Can I get gas and broadband from the same supplier?+

Yes. Fuels covered are electricity and gas, so electricity and gas can sit with one company, and the same group runs a full fibre broadband service alongside. For a household in the network area, that means one counter and one relationship rather than three.

How do I get help if something goes wrong?+

Support runs through phone, help centre and email, which includes a phone line, a help centre and email. A company of this size, with 140,000 customers, also has a local presence that national brands often lack, which usually makes account queries easier to sort.

Sources

Compiled from 10 source pages, checked September 30, 2026. We did not open an account.

Stadtwerke Karlsruhe

Stadtwerke Karlsruhe

Karlsruhe households wanting local electricity and gas plus full fibre broadband under one municipal roof.

8.7/10See alternatives

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