PPC and Protergia are marketing dynamic electricity products for residential customers in Greece where retail prices move with wholesale market prices rather than staying fixed across a month or contract term. The shift changes how households and small businesses experience price signals across the day. Dynamic pricing is positioned as a mechanism that can enable consumption shifting between hours.
Dynamic tariffs can create incentives to move demand for electric vehicles, air conditioning, heat pumps, and other appliances into lower-cost periods. PPC’s myHome Dynamic product sets electricity pricing using a formula of 1.19 times the hourly market clearing price plus €0.044/kWh, alongside a fixed charge of €9/month. The company publishes the next day’s 24 hourly prices to support scheduling decisions.
Participation requires an installed smart meter and validated metering data from distribution operator HEDNO. PPC also says customers seeking to enter a dynamic contract can request smart meter installation rather than waiting for HEDNO’s normal national replacement programme. The supplier frames the availability of the meter as a practical requirement for taking part.
Smart meters and dynamic retail pricing in Greece
Smart meters have previously been justified through billing efficiency, remote readings, and network modernisation. With dynamic tariffs, the meter provides an immediate commercial pathway for consumers to access hourly price exposure. In that context, the meter functions as the entry point into a retail offer tied to market-clearing outcomes.
Protergia is competing with its Dynamic One Home product for residential low-voltage customers with smart meters. The offer includes a fixed charge of €9.90/month and hourly pricing linked to the wholesale market. Protergia also sells dynamic products to business customers, including low-voltage users.
Wholesale reference architecture and hourly price calculation
The reference architecture behind the products is provided by Greek market operator HEnEx. For each delivery day, HEnEx publishes the day-ahead clearing price for individual market time units and an hourly reference price for dynamic electricity contracts. Because Greece’s day-ahead market clears in 15-minute units, the hourly reference is calculated as the average of four quarter-hour prices within each hour.
This structure links wholesale volatility directly into the retail bill through the published reference price. It also introduces variability for consumers whose demand patterns remain concentrated in higher-priced hours. The value of dynamic tariffs is described as depending more on load flexibility than on annual electricity consumption alone.
Load flexibility use cases and automation via software
An example given in the products’ context is an electric vehicle consuming 3 MWh/year, which may be more valuable as a flexible asset if charging can be moved several hours without affecting the consumer. Heat pumps combined with thermal inertia or hot-water storage are described as another application where shifting demand can be possible. Air conditioning is also identified as relevant because summer cooling demand can be influenced by temperature management across intervals.
The products’ design implies that dynamic retail pricing can support automation around electricity contract schedules. Current customer-facing information is based on tomorrow’s prices, with behavioural changes encouraged accordingly. The next step described is software that can download the next day’s hourly price curve automatically.
A home-energy-management platform could use that curve to decide when to charge an EV, operate a water heater, or pre-cool a building. In that setup, control actions are executed without the customer actively trading electricity at each interval. The described mechanism is an algorithm performing decisions on behalf of the customer.
Supplier economics, aggregation overlap, and device portfolios
This creates overlap between retail supply and aggregation functions where many controllable devices are managed together. A supplier controlling thousands of such devices has access to a dispatchable demand portfolio rather than only passive customer demand. The supplier could optimise that portfolio against wholesale procurement while balancing exposure and participation in flexibility markets.
Dynamic contracts also change how price risk is allocated between suppliers and customers compared with traditional retail structures that may smooth variable wholesale movements. A traditional retailer carries much of the price risk by buying at variable wholesale prices and selling under a retail tariff structure designed to reduce volatility for customers. Under dynamic terms, more of the hourly exposure shifts to customers while suppliers take on requirements related to helping manage that exposure.
Competitive models for dynamic tariffs and infrastructure constraints
The competitive landscape described includes multiple approaches beyond headline €/kWh pricing, including wholesale pass-through offers and bundles that pair dynamic electricity with automated EV charging. Other models combine dynamic tariffs with heat pumps, home batteries, or smart thermostats, while another approach described involves guaranteeing savings in exchange for limited control over selected appliances. In these cases, margins are described as coming increasingly from optimisation rather than from fixed tariff structures.
Dynamic pricing depends on infrastructure conditions: suitable metering must exist and validated interval data must flow efficiently between HEDNO and suppliers . Greece has moved beyond conceptual discussion because products are commercially available and competing for customers . The regional significance is framed around whether consumers respond to wholesale prices and whether suppliers can translate that response into scalable flexibility services .
The metric highlighted for evaluating outcomes is not limited to how many households sign dynamic contracts but extends to how many megawatts of household load become controllable once those contracts are taken up .
