Dynamic pricing is a trade, not a discount
A dynamic tariff does not publish a single unit rate. It follows the market, so what a kilowatt-hour costs depends on the hour you use it. That suits a household with a smart meter, a home battery or a car charger that can be scheduled, because usage can move into cheaper hours. It suits a household with a fixed daytime routine less well. Start from the Smart and dynamic electricity tariffs ranking to see which of the listed suppliers actually sell a dynamic product.
Powerpeers is the clearest worked example. Its range covers dynamic, fixed, variable and green tariffs, and it supplies both electricity and gas, so a dynamic contract can be weighed against the fixed one on the Powerpeers review page. A fixed product holds one rate for the whole term, while a dynamic one prices every hour separately. That is the trade-off the rest of this guide unpacks.
Read the unit rate the way each supplier quotes it
Unit rate is the first number to check, but only within a single currency. Powerpeers quotes €0.11 to €0.30 in euros, and Endesa quotes €0.12 in euros. Across the tariffs we list, unit rates run €0.05 to €0.38 in euros, so a euro quote near the top of that spread is a weak result against the rest of the list, and one near the bottom leaves more room in the budget.
ELECTRICITY RATINGS quotes in dollars. Its unit rate runs $0.062 to $0.15, and it works in a single market, the US states it serves including Texas, as set out on the ELECTRICITY RATINGS review page. It offers fixed, ev, time-of-use, green and prepay tariffs. Do not place that dollar rate beside a euro rate and declare one the cheaper. Convert first, then apply the same comparison you would use on the Endesa review page.
Let the standing charge tell you which rate matters
The standing charge is the part of the bill that does not move with the market, so on a dynamic tariff it is just as important as the headline rate. Powerpeers charges a standing charge of €0.21 to €0.39. Endesa charges €2.85. Standing charges across the tariffs we list run €0.09 to €78, a spread wide enough to reorder two suppliers depending on how much electricity a home actually uses.
Decide which side of that spread you sit on. A home that uses little electricity feels the standing charge far more than the unit rate, while a home that runs heating, cooking or car charging on top feels the unit rate. Multiply your own consumption by the unit rate, add the standing charge, and the same pair of numbers can rank suppliers in opposite orders. The reference annual cost we publish, €192.92, gives you a baseline to test your own figure against.
Contract length and the cost of changing your mind
A dynamic contract that is reviewed often suits a household that may move or change usage, while a fixed term suits one that wants a known rate. Powerpeers offers terms of 12, 24 and 36 months, Endesa offers 12, 36 and 60 months, and ELECTRICITY RATINGS lists terms of 9, 12 and 15 months. Longer terms give more months at the rate you signed, shorter terms give more chances to move. Check whether the dynamic product sits inside those terms or outside them before you commit.
Exit fees tell you what a change costs. 100Green charges no exit fee, and Endesa charges no exit fee on its electricity contract, while exit fees across the tariffs we list run €0 to €58.11. A low unit rate paired with a high exit fee is only a saving if you stay put, so read the fee on the 100Green review page rather than assuming a switch costs nothing.
Solar and renewable supply: the export rate question
If you have panels, the export rate can be worth more than a modest saving on what you buy back, and it is the first thing to compare. Endesa pays €0.06 for exported energy, while ELECTRICITY RATINGS shows $0.25 in dollars. A household without solar can skip this step entirely and put the same attention into the unit rate and standing charge instead.
Renewable supply is the related question for green buyers. Powerpeers backs its contracts with 100% renewable electricity and lists a green product alongside its fixed, variable and dynamic options, so a household that wants renewable supply is not pushed towards a dynamic contract to get it.
Features: EV charging, time-of-use and the app
Smart tariffs are often bought for the devices they can run, so check what each supplier actually supports. Endesa's charging offer integrates with Tarifa Recarga en Casa, with charger power running 7.4 to 22, a charger priced at €1,099, installation included, a tethered unit and a warranty of 3 years. It also has a mobile app, so charging sessions can be watched from a phone instead of estimated.
ELECTRICITY RATINGS lists ev and time-of-use tariff types, which gives an electric car household a product designed to shift charging into cheaper hours. On support, Powerpeers and Endesa both offer email, chat, phone and a help centre, while ELECTRICITY RATINGS runs through email and phone. That gap matters if you expect to query live hourly prices often and would rather open a chat than hold a phone queue.
Trading history, support and where to read the detail
Two checks narrow a shortlist further. The first is how long the supplier has been operating: Endesa was founded in 1944, serves 12,700,000 customers through ENDESA ENERGIA S.A.U. and works across Spain and Portugal, covering Spain, Canarias and Baleares. The second is reachability, since a dynamic tariff generates far more billing questions than a fixed one and support reach matters more on that product.
Finally, price comparison only settles the euro amount, so keep the shortlist somewhere you can revisit. The rankings collect the dynamic and smart products in one place, the individual review pages carry the terms behind each number, and the same order of checks works for any other supplier on the site: unit rate first, then standing charge, then term and exit fee, then export rate and green supply, then the features your household will actually use.