Education
Practical guides to using electricity smarter and saving money
Housing co-op electricity: cut common costs
Which shared loads a co-op can move to cheap hours — sauna, hot water, garage charging, heat pumps — and the Shelly Pro hardware to do it.
Energy management for small businesses, no BMS
Real-time consumption and cost per site, and price-based control of water heaters, saunas, heating and charging — without a BMS project.
Rental property electricity: real-time monitoring
Sub-meter a rental with Shelly, see its consumption and cost live, heat empty cottages in cheap hours — and what you may bill tenants.
Cut Your Winter Electricity Bill 2026/27: The Complete Checklist
Twelve steps to lower heating and electricity costs this winter, plus a widget showing what scheduling heating to cheap hours would have saved in your country last winter.
Water Heater as a Home Battery: Heat on the Spot Price
A 200-litre tank stores as much energy as a home battery, with no conversion losses. Turn it into a store that follows the spot price.
Samsung SmartThings: air conditioners and plugs on cheap hours
Connect your Samsung air conditioner or heat pump and your SmartThings plugs, then let Elewatt heat, cool and switch them by the electricity price.
evcc: charge your EV on your real cheapest hours
Feed Elewatt's all-in electricity price into the evcc charging controller so it plans charging around what you actually pay per kWh.
Control any smart device with Elewatt via Home Assistant
Midea, Nibe, Sonoff, Sensibo and more: bridge them through Home Assistant OS on a Raspberry Pi and let Elewatt schedule them on the cheapest hours.
What 1 kWh of Electricity Really Costs: Spot Price + Fees
See what 1 kWh really costs: spot market price, grid fees, taxes and supplier margin explained — and how to check your true electricity price live.
From One Tinkerer to Another — Welcome to Elewatt
The story of why Elewatt was built — and how it might be exactly what you've been looking for.
Smart EV Charging: Charge at the Cheapest Spot Price Hours
Electric vehicles are expensive to run at peak hours. Learn how to automate charging to always use the cheapest electricity.
Electric Radiators on Spot Prices: Heat in the Cheap Hours
Space heating is the biggest energy use in European homes. Learn how to automate electric radiators to run only during the cheapest hours.
Shelly Smart Relay: Automate Any Device on Spot Price
Connect your Shelly relays to Elewatt and let spot-price schedules decide when they run — no manual work, no scripts to maintain.
Shelly Plug S Gen3 Setup Guide & Spot-Price Automation
Step-by-step Shelly Plug S Gen3 setup: connect it in minutes, then let Elewatt switch your water heater on in the cheapest spot-price hours. Free to start.
Shelly Electricity Tariff: Live Spot Prices, No Scripts
Send live spot prices to Shelly's Electricity Tariff API in 5 minutes. No scripts, no Home Assistant — just paste one URL into Elewatt.
Daikin Onecta: Run Your Heat Pump on Cheap Spot Price Hours
Connect your Daikin heat pump to Elewatt via the Onecta cloud and automatically heat during the cheapest electricity hours.
What Is a Smart Grid? Pros, Cons & How You Save
A plain-English guide to smart grids — how they work, their pros and cons, and how automating your home cuts your bill while helping balance the grid.
The Gigacorn Challenge: Save 1 Gigatonne CO₂/yr
How smart demand control for water heating and EV charging is one of the clearest paths to 1 GT of annual CO₂ savings — and the full calculation showing how Elewatt gets there.
Spot Price Apps for Smart Homes: 2026 Comparison Guide
Scripts, Home Assistant or a ready-made app? Compare tools that run your water heater, heat pump and EV charger in the cheapest spot-price hours.
Electric vs Petrol Cars: Running Costs & Maintenance
Compare electric and petrol cars: running costs, maintenance, environmental impact, battery recycling, and total cost of ownership.
Best Balcony Solar & Battery Backup Systems
Compare Anker Solix, EcoFlow, Bluetti and Zendure balcony solar batteries — and charge them on the cheapest spot-price hours with Elewatt.