This innovation features :

- fitting flat PV panels on the units'roof that incorporate the latest high-efficiency monocristalline panel technology including "back contact" calls,
- the latest versions of LED lighting modules,
- the creation of light wells in the roof panel using specially developped GFRP to guarantee enhanced natural lighting, perfect water-tightness and controlled ageing,
- a storage battery pack using the latest generation maximum peak power tracking (MPPT) solar panel controller.

Case study for a mobile sales outlet.

Mission :

Remove the need for an on-board generator set and make the unit self-sustaining for a power demand of 1250 W/day under 24 V.

Programme requirement :

- three 500 mm x 500 mm light wells in the roof,
- two 210 Ah batteries,
- one MPPT controller
- sixteen hight-efficiency monocristaaline PV panels, each giving 100 W at 12 V for a total area of 8.75 sqm, fitted to the units'roof (an increase in vehicle height of only 110 mm).
- replacement of the existing 230 V fluorescent tubes by 230 V LED tubes, some lighting level for half the power.
- Off-road time limited to one week.

Results :

An average daily production of 1000 W in December in the north of France enabled the vehicle to operate for 6 days without having to recharge the batteries. The same set-up is designed to produce over 7000 W/day during August in the same region.

Pay-back in less than 5 years (at current energy costs)

CASE STUDY FOR AN OUTSIDE EVENTS'UNIT :

Mission :

- Autonomous operation for 5 full days without mains recharging at a rate of 6 400 Watts/day,
- Remove operational difficulties related to mains connecting for 3 to 4 trips/day,
- Eliminate the generator set,

Programm requirement :

- 8 lead-acid gel type batteries,
- 3 MPPT type controllers with real-time LCD screen display,
- 44 high-efficiency monocristalline PV panels, each giving 100 W at 12 V for a total area of 24 m2 (an increase in vehicle height of only 110 mm).
- 14 - 230V LED lighting tubes giving 400 lux,

Results :

- Average annual electricity output in Paris of 12 900 Watts/day with a minimum in December of 3500 Watts/day and a maximum in July of 22 000 Watts/day,
- The installation rapidly pays for itself and goes with productivity gains that include removing the need to organise on-site mains recharging, time saving by optimising vehicle set-up times and eliminating costs incurred by an on-bard generator set (purchase, maintenance, fuel, ...)

Payback time 4 years