A group project by Sanem Genc (Turkey), Christina Braun (Switzerland), Julius Kühn (Germany), Evelina Kompare (Slovenia), Cagdas Karakurt (Turkey) & Christina Kontaxi (Hellas) for Flims-Laax-Falera region / Graunbunden / Switzerland

1. CO 2 Neutral E-Mobility ISUenergy project group no. 2 Sanem Genc (Turkey) Christina Braun (Switzerland) Julius Kühn (Germany) Evelina Kompare (Slovenia) Cagdas Karakurt (Turkey) Christina Kontaxi (Hellas)

2. Overview The Flyer Bike experience Ideas and Aims of our Project - Infrastructure - Energy Source - Social Acceptance PV Integration: Off-Grid and Feed-In Summary and Ideas for Financing

4. Target Group: Mainly targeted to tourists Summer season (May to September) Infrastructure: 5 flyer rental stations 7 hotels with flyer bikes 15 batteries exchange stations (hotels, restaurants) Disadvantages: - not always 24hrs/day availability - charging of batteries is dependent from the grid, at the specific charging stations Introduction Current State of Flyer Bike Flims-Laax-Falera

5. Flyer Electro Bike m ap

6. Idea and Aim of the Project (1/2) Build on the existing Infrastructure… … but make it more flexible and cleaner Expand the Infrastructure: Keep current stations ( 5 flyer rental stations , 7 hotels with flyer bikes ) and expand the 15 batter y exchange stations to a total of 30 stations located at bus stations Advantages: + Increase of the availability of charging stations + Increase of the visibility of the Flyer electrobike + Increase of the mobility of the users Use the Sun as the Source of Energy: Replace the grid dependent charging stations with a dual strategy of PV integrated systems: 1. off-grid charging stations at the bus stops 2. charging stations with PV modules, connected to the grid for the larger charging stations Advantages: + Clean, CO2 neutral mobility + Abundance of energy source + For larger stations: possibility of feed-in solar energy to the grid

7. Idea and Aim of the Project (2/2) Expand the Target Group: Make the charging station available for the local population for them to use with their own electro bikes!  Example: use a card with integrated chip to open the charger stations at the bus stops  Sell subscription to the locals who own an electro bike to use the stations along with the tourists who rent the bicycles Value Added to the Region: The Flims-Laax-Falera region has an overcapacity of beds in the summer Interest to attract more tourists during the summer Advantages: +The clean mobility concept – powered by the sun – has the potential to attract more environmentally conscious tourists + The clean mobility concept will add to the current commitment of the region to use more environmental-friendly solutions (see “Gr ünbünden” on the bus) + The charging stations will increase the mobility of both tourists and the local community, as well as the number of users! + Interesting and innovating solar architecture of PV bus station

8. PV Integration I: Off-Grid Charging Stations @ Bus Stop (1/2) Off-Grid Charging Stations at the Bus Stop Install charging station at the 30 Bus stops in the Flims-Laax-Falera Region with 3 batteries using Solar Energy only to charge the bike

9. PV Integration I: Off-Grid Charging Stations @ Bus Stop (2/2) Schematic Overview

10. Calculations for Off-Grid Charging Stations at Bus Stations (1/2) Estimated global irradiance in Falera by PVGIS* * http://re.jrc.ec.europa.eu/pvgis/apps3/pvest.php # Average solar Irridation 408.31 Wm2 PV Cell First Solar 75W Thin Film CdTe Efficiency: 10.7% Nr of Batteries in Charger 3 batteries Average charging time 6hrs per battery Energy needed to charge the System 256 Wh/m2 x 3 batteries = 768Wh Area needed for PV 2.93m2 Power installed 300W Total Cost of one Charging Station 3 EUR per Wp installed = 900 EUR + 100 EUR for storage battery Total 1000 EUR Infrastructure Bus Stop is not included Cost of 30 charging stations 30´000 EUR

11. Calculations for Off-Grid Charging Stations at Bus Stations (2/2) For the system that has 3 charger : Average solar radiation during summer season in Falera : 408.31 (W/m 2 ) We use First Solar 75 W solar panel with %10.7 eff. (120cmx60cm =0.72 m2) Electrical Input : 408.31 (W/m 2 ) x %10.7 = 43.69 (W/m 2 ) Average charging time : 6 hours per battery Energy that we get from sun : 43.69 (W/ m 2 ) x 6 hours = 262.14 (Wh/m 2 ) Energy that we need to charge system : 256 (Wh) x 3 (battery) = 768 (Wh) Area that we need : 768 (Wh) / 262.14 (Wh/m 2 ) = 2.93 (m 2 ) Power that we need : 2.93 m2 x 43.69 W/ m2 = 128.01 W (2 PANELS) Power that we need to install : 2.93 m2 / 0.72 m2 = 4.07 (4 PANELS) 4 x 75 W = 300 W

12. PV Integration II: Grid-Connected PV Charging Station Schematic Overview

13. Calculations for Grid-Connected PV Charging Station (1/2) Estimated global irradiance in Falera by PVGIS* Average solar Irridation 408.31 Wm2 PV Cell First Solar 75W Thin Film CdTe Efficiency: 10.7% Nr of Batteries in Charger 10 batteries Average charging time 6hrs per battery Energy needed to charge the System 256 Wh x 10 batteries = 2.5 kWh Area needed for PV 9.77m2 Power installed 1050W Total Cost of one Charging Station 3 EUR per Wp installed  3000 EUR Cost of 12 charging stations 36´000 EUR

15. Summary and Ideas for Financing Total Costs For off-grid bus stations: 30´000 EUR For larger PV modules with feed-in option: 36´000 EUR Total Installations Off-grid bus stations: 30 PV modules with feed-in option: 12 Total Capacity Off-grid bus stations: 9´000 W PV modules with feed-in option: 12´600 W Total 21´600 W Financing Possibilities - Flims Laax Falera Tourismus AG - Sell subscription for charging stations to the locals - Generate revenue from feeding-in solar energy to the grid - Support from the canton Grünbünden ?

17. Thanks for your attention… … Questions? Get on the solar E-Bike!