Solar energy at Uniworld Gardens 400kW to provide back up power

DRL_v2NDL Executive summary Solar irradiation in India is one of the best in the world At current prices, solar power is competitive to diesel genset power Uniworld Gardens can have 400kW of roof top solar to meet ~20% of backup power needs 400kW requires a capex of Rs.6 Crores Free Energy can install solar power with no initial cost at Uniworld Free Energy will require a power purchase agreement with Uniworld Gardens with assured offtake for 10 years at Rs.15/unit

DRL_v2NDL Solar irradiation in India is one of the best in the world Yearly sum (kWh/m 2 ) < > Optimum tilt in India varies from degrees South Roof-top solar is the optimal approach to tap this radiation Roof-top solar enables production at point of consumption eliminating grid losses Solar power is now competitive with diesel back-up and in some regions at par with commercial power tariffs

DRL_v2NDL Roof-top Solar PV is cheaper than diesel power and competitive with commercial grid tariffs in some regions * Tariff depends on state and consumer COMPARISON OF COST PER POWER UNIT [INR/kWH] Rs.15/kWh Rs.10/kWh Rs.5/kWh Grid power* Max cost Min cost Diesel power Max cost Min cost Customers using diesel powered back-up can reduce costs significantly by immediately switching to roof-top solar with battery backup Customers paying commercial tariffs of >Rs.8/kWh can switch to roof-top solar without battery backup Max cost Min cost Solar power

DRL_v2NDL Solar power is however expensive and capex is the biggest constraint Solar power with battery banks costs Rs.15 crores/MW Comparably diesel genset costs are of the order of Rs.2-4 crores/MW Initial capex is the biggest constraint for large scale adoption of solar power Free Energy has devised a solution to enable customers to pay only for the power they consume Free Energy will invest the capex

DRL_v2NDL How much solar power can be set up at Uniworld Gardens? Solar panels can be set up on the roof tops of the 8 buildings Total area available: 6200 sq. m Solar capacity that can be set up (assuming 80% usable): 400 kW System capex: Rs.6 crores

DRL_v2NDL 400kW will generate 5.3 lakh kWh of electricity per annum Solar will meet ~20% of backup power needs at Uniworld Gardens

DRL_v2NDL What is the Free Energy value proposition? Free Energy will raise the capital needed to set up these solar plants Free Energy will install and maintain the solar panels without any initial capex from Uniworld Gardens Free Energy will sign a PPA (power purchase agreement) with the residents of Uniworld Gardens The PPA entitles Free Energy to receive Rs.15 for every unit of electricity consumed from solar panels for 10 years (genset power is at ~Rs.13/kWh and escalating at 10% p.a.) Free Energy will transfer ownership of panels after 10 years to Uniworld Gardens

DRL_v2NDL Next steps 1)Uniworld Gardens RWA to provide in-principle approval to the Free Energy approach (initial contract to be signed between the two parties) 2)Free Energy will do a detailed system design to determine exact requirements 3)Free Energy will sign a PPA contract with Uniworld Gardens RWA 4)Free Energy will raise investments for the project on the PPA (2-3 months) 5)Free Energy will install solar power at Uniworld Gardens (1-2 months) 6)Free Energy will maintain the solar panel system and charge residents on a monthly basis (Rs.15/unit) for 10 years

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DRL_v2NDL FAQs Does the solar eliminate the need for diesel back up? -No, solar can only substitute some of the diesel you consume. -Also, production is only during the day (battery bank enables consumption smoothing through demand cycles though) ->85% of diesel genset costs incurred every month are due to the opex (diesel consumed) What maintenance do I need for these installations? -Free Energy provides complete O&M for the solar system -Only maintenance needed are: cleaning of solar panels every 15 days, replenishing water levels in battery bank every year -Every 5 year cycle, batteries will need complete replacement What happens when there is cloudy/ foggy weather? -Radiation incidence on panels is lower. Therefore, lesser electricity is produced. -However, India is well endowed with solar radiation (refer average radiation levels) all year How long will it take to install these solar units? -Post raising funds, these installations have 2-4 months construction lead time without any intrusion of existing power supply set up