Batteries at Home
Design your zero-bill setup — solar + battery + EV.
Real tariffs, real solar yield, real loads — find the right setup for your home
Select your country to see setup costs to optimize your home to either go off-grid, zero-bill, max-savings or anything in between
Daily Energy Flow
Configurator
Power Usage at Home
Configure your household and EV-charging energy consumption at home
Household Load
Configure your household energy consumption during the day and night
EVs in Household
Add electric vehicles in your household and configure the charging behavior for each
System Setup
Configure your solar and battery system
Full Off-Grid: Conservative system with 20% solar buffer and 2.5 days battery autonomy for maximum reliability
Zero-Bill: Optimized system that achieves zero monthly bill (may be smaller than off-grid)
Best Net Savings: Best 25-year net savings including system and EV costs
Custom: Manually configured system without optimization.
Live Simulation
Financial Overview
Monthly View
Monthly electricity bill comparison
25-Year View
Total cost over 25 years including electricity, EV charging, and system cost (3% annual inflation)
Setup Cost
Initial system investment and expected payback period
Energy Flow
Scenario Comparison
How much more value does a battery (and EV) add on top of solar?
Cost vs savings
CO₂ & self-sufficiency
*Real 2025 tariffs/yields. Assumes average household. Actual varies by roof/usage/weather. Updated monthly.*