Solar EV Charging
An electric car doubles household electricity consumption. Charging overnight is expensive; recharging in the sun requires suitable equipment.
Savings compared with grid electricity
~100% (free)
Smart Terminal Cost
CHF 1 200–2 500
Bi-directional terminal (V2H)
From ~CHF 8 000
Battery impact at home
+ 50–80 kWh of stock
Turn your electric vehicle into a free rolling battery.
Remember the essentials of this issue at a glance before moving on to the detailed analysis and recommendation.
Objective
Decide quickly
Horizon
2026
Approach
Practical decision
Verifications
5
Problem Analysis
The transition to electric mobility generates enormous electrical needs. A household driving 15 000 km per year will add around 2 500 kWh to its balance sheet. The common mistake is to install a 'basic' terminal and charge the car in the evening when returning from work, using only the public network, at the high nightly rate.
The real profitability model is total coupling: using the mid-day solar surplus to charge the car with 100% free energy. For this, the terminal must not be a simple wire connected to the electrical panel, it must communicate digitally and in real time with the solar inverter.
Our Recommendation
Buy a surplus control terminal (Intelligent Terminal / Smart-Wallbox).
Favor in the quote or the integration of terminals of the same brand as the inverter (eg: Fronius Wattpilot, SolarEdge EV Charger) or agnostic terminals recognized for their excellent communication (such as myenergi zappi or go-eCharger).
These terminals use the 'Charge to surplus only' function. If a cloud passes, the car's charging slows down or stops, so you never have to pay for electricity. Finally, watch for the arrival of V2H (Vehicle to Home): bidirectional terminals which will soon allow the car battery (often > 60 kWh) in Switzerland to directly power the entire house in the evening, making wall batteries obsolete.
Sources & Method
Analysis based on ElCom 2024–2026 data, OFEN (Federal Office of Energy), Pronovo SA, EPFL and HEG Geneva studies. The financial projections use the following assumptions unless otherwise stated: local purchase price, GRD injection price, production 1 100 kWh/kWp/year, self-consumption rate 35–40%. Actual results vary depending on canton, roof orientation and consumption profile. The site may also present its own services or calls for contact related to these subjects.
Next step
Compare several quotes, validate profitability with our tools and then check the contractual conditions adapted to your canton.
No obligation · Transparent data