What is Stekker?
Stekker is an energy management system (EMS) purpose-built for electric vehicle charging. It acts as an intelligent control layer between your charging hardware, the electricity grid, energy markets, and your drivers. Instead of charging at full power the moment a cable is plugged in, Stekker schedules and distributes energy in the smartest way possible.
The Problem with Uncontrolled Charging
When an EV plugs in without smart charging, it draws maximum power immediately. At a site with multiple charge points, this creates expensive demand peaks, ignores cheap electricity hours, and wastes available solar energy. For businesses, this means higher energy bills, risk of exceeding contractual grid limits, and no visibility into what is actually happening at the plug.
How Stekker Solves It
Stekker continuously optimizes every active charging session at your site. A constraint solver considers all relevant factors simultaneously:
- Dynamic electricity prices — Stekker uses day-ahead market prices (ENTSO-E) to shift charging to the cheapest hours of the day.
- Solar production — When your site has solar panels, Stekker forecasts generation and aligns charging with peak solar output.
- Site power limits — Your grid connection has a contractual capacity (GTV). Stekker ensures total site consumption stays within that limit, avoiding costly overruns.
- Driver preferences — Each driver can set a departure time and desired charge level. Stekker guarantees the car is ready when needed, while using the available time window to optimize.
- Vehicle battery status — For connected vehicles (Tesla, Volkswagen, Hyundai/Kia), Stekker reads the actual battery level to plan more accurately.
Every few minutes, Stekker re-evaluates and adjusts. New car plugged in? Price forecast updated? Solar cloud cover changed? The plan adapts automatically.
Key Capabilities
Stekker offers several optimization strategies that work together:
- Load balancing and peak shaving — Distributes power across charge points to stay within your grid connection limit. Learn more about charging preferences.
- Solar optimization — Maximizes self-consumption of locally generated solar energy.
- Dynamic pricing — Automatically shifts charging to the lowest-cost hours based on day-ahead market prices.
- Priority management — Assign high or normal priority to specific cards or vehicles so critical fleet vehicles charge first.
Who Is Stekker For?
Stekker serves a range of users:
- Fleet operators — Optimize charging costs across a vehicle fleet while ensuring every car is ready for its next trip.
- Businesses and offices — Offer workplace charging to employees without blowing your grid connection or energy budget.
- Charge Point Operators (CPOs) — Integrate existing charging infrastructure through CPO partnerships like E-Flux, Evesto, or Maxem.
- Personal users — Charge your EV at home using the cheapest and greenest hours automatically.
Whether you manage two charge points or two hundred, Stekker adapts to your situation. Ready to get started? Read Getting Started: Your First Week with Stekker to see what the onboarding process looks like.
