Solar panels, smart charging and a battery are often presented as the ideal combination for sustainable mobility. In practice, it does not always pay off.

The energy flow

ProductionSolar panelsGenerate power during the day, even when the cars are not plugged in.
BufferBatteryStores that energy and releases it when the cars return.
ControlDynamic load balancingCharging power follows solar production and grid load.

When does it pay off?

01

Sites with an existing PV installation

The added value lies mainly in adding the battery.

Key takeaway: payback of 5 to 8 years.
02

Fleets that mainly charge at night

The battery shifts daytime production to the evening hours.

03

Sites with a capacity tariff and high peaks

Peak shaving with the battery significantly lowers annual grid costs. How that works is covered in capacity tariff and smart charging.

04

Companies with a dynamic energy contract

Charging during negative hourly prices, discharging the battery at peak prices.

Does the combination pay off on your site?We combine your grid connection, PV production and charging profile in one calculation model.
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When does it not pay off?

No solar panelsBattery too expensiveWithout a free energy source, the investment is too high.
Mainly daytime chargingBattery unnecessarySolar power goes straight to the car, not through the battery.
Fewer than 5 EVsNo economies of scalePayback exceeds 10 years.

Calculate it on your own profile

An installer who sells you this combination without knowing your consumption profile is selling you a gamble.

Certipower calculates it based on your actual consumption profile. If grid capacity on your site is the bottleneck, also read what to do when grid capacity is too limited and load balancing: what and why?

InstallAt the employee’s home, on the company site and on the road.
MeasureProduction, consumption and charging power per location, without estimates.
My.CertipowerConsumption and costs per user and per location, without Excel.
Split billingYour employee pays nothing upfront and submits no receipts. How split billing works
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Solar panels, chargers and a battery: profitable for you?

We combine your data in one concrete calculation model.

  • Your grid connection, PV production and charging profile together
  • Scenario with and without a battery
  • Payback and savings in euros
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