Fleet telematics: how much can your fleet save?

Eco-driving saves 3 to 7 % of fuel on a combustion fleet when drivers get feedback on their driving. The reference meta-analysis (Sanguinetti et al., 2020, 17 studies) measures 6.6 % on average, 7 % for professional drivers and 8 % when feedback comes with rewards. Over a year in real conditions, the effect falls back to 3 to 5 % if nobody follows the scores (Energy Saving Trust, European ecoDriver project). The calculator uses 4 % as cautious and 6 % as realistic.

Yes, and in town the gain is much greater than on a combustion car. In a study of more than 500 tests published in 2025, eco-driving cut consumption by 30 % in town on an electric vehicle, compared with 11 % on a combustion vehicle (Miqdady et al.). An electric car calls for a new way of driving: anticipating so that regenerative braking recharges the battery, and moderating speed, because driving at 130 instead of 110 km/h uses around 20 % more. Over four years of real measurements, driving style changes an EV's consumption by up to 16 % (Al-Wreikat et al., 2021). The calculator uses 8 % as cautious and 12 % as realistic.

Yes: regular feedback on driving reduces risky behaviour, and therefore claims. A randomised trial published in 2026 with 1,449 drivers measured 11 to 13 % less speeding and 16 to 25 % fewer harsh braking and acceleration events (Ebert et al., Accident Analysis & Prevention). In fleets fitted with recorders, accidents fell by 15 to 30 % (TRL, 2015). The result depends on how involved the fleet manager is: the calculator uses 10 % as cautious and 15 % as realistic.

Budget €0.12 to €0.22 per excess kilometre depending on the leasing company, more on premium vehicles. In the United Kingdom, 12 to 17 % of returned cars pay an excess mileage charge, £586 on average (FN50 survey 2024). Spotting the drift during the contract lets you reassign the vehicle or renegotiate the mileage before it is returned.

No. Voltaback collects the data directly from the connected vehicle, with no box and no installation. Almost all recent vehicles are compatible, combustion vehicles included. Vehicles from before 2020 can be harder to connect depending on their equipment.

Send us your vehicle list (make, model, year): we test the compatibility of each one, free of charge, before any commitment. You receive the list of compatible vehicles and the savings recalculated for those vehicles only. Almost all recent vehicles are compatible, combustion vehicles included; some vehicles from before 2020 may not be, depending on their equipment. Request a compatibility test.

No. The company never receives the geolocation of its drivers. It sees the mileage, consumption, driving scores and alerts. No geolocation system to declare to the staff delegation under Article L.261-1 of the Labour Code. Voltaback is ISO 27001 certified and hosts data in the European Union.