OFF-GRID SOLAR, PHOTOVOLTAIC SYSTEMS

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2 OFF-GRID SOLAR, PHOTOVOLTAIC SYSTEMS

3 ENERTECH ENGINEERS SERVICE PARTNER DE

4 About us ENERTECH ENGINEERS is a company oriented to consulting and management of projects, born and conceived for the development of the field of engineering with a mission to provide a service of high technical quality, flexibility and responsiveness for maximum satisfaction our customers. We have a great professional team composed of engineers and experts specializing in renewable energy and energy efficiency. We are Service Partner of the most important brands in the renewable energy sector: Yingli Solar, SMA and Würth Solar, enabling us to offer our customers facilities and quality materials at competitive prices in the market.

5 OFF-GRID PV SERVICE PARTNER DE

6 OFF-GRID The concept of off-grid refers to the generation of energy for own use, whether it is a residential, commercial or industrial. For this purpose, the PV system must be connected to the inner consumer electrical circuit at the point of its ownership closer to the General Protection Box.

7 OFF-GRID PV Types The generation of electricity through photovoltaic panels in off-grid system without net balance tends to cover the consumer energy demand. Surplus production is sent to the grid, and sold at market price and there is no regulated rate ( is at market price). The components are the same as in conventional grid sale. The generation of electricity through photovoltaic panels in a system with net balance off-grid covers TOTAL energy consumer demand. The surplus production is sent to the grid, and recovered in moments of low PV electricity production. It is performed by a comparison of energy produced and consumed, which allows to consumer to use the electrical system as "store" for the surpluses and retrieval it later. This modality is pending by regulation.

8 OFF GRID PV DIFFERENCE SITUATIONS CASE 1: Consumer electricity demand is fully covered by PV production. Today is the optimal solution.

9 OFF GRID PV DIFFERENCE SITUATIONS CASE 2: The PV system can not generate all consumption of the property and uses the grid to cover electricity demand.

10 OFF GRID PV DIFFERENCE SITUATIONS CASE 3: PV production exceeds consumer demand, and the surplus is sent to the grid, selling a as net balance regulation.

11 OFF GRID PV REASONABLE PAYBACK To obtain reasonable payback times, we must dimension the installations in order to sent less surplus possible to the grid. The explanation is very simple, each kwh savings during the day has a average value of 0.14 / kwh (3.0A rates trade), and instead each kwh that I sell to the grid has an average price of / kwh (approximate cost net balance regulation during the day), so the more you sent to the grid and sold to regulation price more owe the regulation price and therefore my average is lower than 0.14 / kwh closer and closer to the price of regulation and obviously stretching the limits of payback.

12 OFF GRID PV ESTIMATE Most important for developing the dimensioning is to know the demand curve, that is, kwh consumed by the installation, to match this curve with the photovoltaic generation.

13 OFF GRID ESTIMATE To calculate the demand curve, Enertech Engineering a personal study by analyzing the electric bill for the last year and a study in situ with the actual consumption of the property, by placing a grid analyzer or grid manager in the internal energy consumer for a certain period of time. Using that data, we can give the optimal solution and the fastest ROI (Return of investment).

14 OFF GRID PV In a residence, it is recommended that the production of the PV system does not exceed 30% of the power output in the consumption curve, because this energy is what we usually consume avoiding injecting surplus to the grid. However in an industrial or business may get from 50% to 80%. Considering the consumption curve in hours of solar production, in industrial or tertiary is very interesting offgrid implementing Instant selling price, thus the time of consumption coincide with the time of generation.. In the residential sector is more interested perform a compensatory of electricity produce and consumed, since generation does not coincide with consumer in most cases.

15 OFF GRID PV PROFITABILITY The decreasing costs of the photovoltaic technology has allowed the off-grid been profitable. In addition, net balance mode would permit sent to the grid the instant surplus for later retrieval. PAYBACK (ROI) Aprox. 6-8 Years * Ask us to give a personalized study.

16 OFF GRID PV REAL CASE Real case of single family home with contracted power of 9.86 kw Contracted power 9,86 kw 0,162 /kwh (término de energía) 0,059 /kw (término de potencia) Annual grid consuption (According to bill and study) 7.962,00 kwh Photovoltaic generator 3,22 kwp Annual energy output 4.927,50 kwh Investment 5.796,00 Payback time (ROI) 7 years 1.000,00 800,00 600,00 400,00 Savings on the 200,00 energy bill 55 % 0,00 Electricity comsumption and solar contribution Enero Marzo Mayo Julio Septiembre Noviembre

17 OFF GRID PV LEGALIZATION PROCEDURE Building permit and municipal authorizations. Aval grid access (free for installation of 10kW) Request for grid connection point to the distribution company. Added special regime (REPE) and Registration in the Register (RAIPRE). Prior administrative authorization (depend of autonomous community and no necessary for installations lower than 10 kw) Certificate of low voltage installation, contract of access, review of the distribution company. Certificate commissioning. Representation market. Added in Special taxes. Obligatory for partial off-grid installations. On-site Total off-grid is not necessary to take this step.

18 OFF GRID PV PROFITS SAVING Direct savings in electricity bills with energy prices every day higher ENERGY INDEPENDECE Reducing dependence on external energy, increase the security of supply and increasing the independence facing to electricity companies CONFORTABLE AND ECOLOGYC Careful and enhancing the environment

19 THANK YOU FOR YOUR ATTENTION -CONTACT- Customer service You can contact our customer care team by or phone. We will try to answer your questions as quickly as possible. If desired, you can also visit us and meet us at our offices in the following business hours: Monday to Friday from 9:00 a 14:00 y de 16:00 a 19:00 Headquarter Parque Ccial. Málaga Nostrum. Edif. Galia Center, Ofi , Málaga (España) Tel.: Mov.: info@enertech.es Web: SERVICE PARTNER DE