The solar feasibility study document discusses the key steps and information needed to conduct a solar feasibility study for both rooftop and ground-mounted solar PV projects. The feasibility study involves collecting site details like available roof or land space, structure details, electrical load details, and interfacing voltage requirements. This information is used to design the optimal solar PV system configuration and ensure any issues are addressed. Component placement, cable routing and distances are also determined to prepare an accurate bill of materials and system cost estimate.

1. SOLAR FEASIBILITY STUDY
BY
PREMKUMAR.E
FOR ROOFTOP AND GROUND MOUNTED PROJECTS

2. Solar Feasibility Study
■ The first step in obtaining solar energy is having a solar feasibility study done.
■ It plays very important role while designing Solar PV System.
■ With the solar feasibility in hand, it is easier to prepare accurate Bill Of Material (BOM).
■ It is used to find out any problems associated with the project (and how to solve them).

3. Information to be collected during Site Survey
■ Site Physical Details
– Reserved Roof space for Mounting Solar PV panels.
– Type of Mounting System required
■ RCC Roof (Normal)
■ RCC Roof (Elevated)
■ Galvalume Sheet Mounted
– Orientation of the Building (True South or With some Azimuth angle).
– Tree shading and any other factors that will affect system production.
– Height of the Building.
– Exact Latitude & Longitude details.

4. RCC Roof Mounted (Normal) RCC Roof Mounted (Elevated)

5. Galvalume Sheet Roof Mounted

6. True South Orientation With Azimuth Angle

7. Structure Details
■ RCC Roof
– Existing Pillar/Column Position.
– Slab Thickness and Height of parapet wall
■ Galvalume Shed
– Sheet Profile.
– Existing Truss and Purlin details.
– Turbo vents and Skylight Position.

8. Component Placement Details
■ Confirm Inverter Placement details with Client – It reflects in DC cable Loss & Cost.
■ Lightning Arrestor Placements
■ Earth pit Location – This Should be confirmed & Approved by Client.
Measure the Cable Distance
■ Get the Exact Distance between Module Array & Inverter.
■ Cable Routing Confirmed by Client (From ACDB to Existing LT panel)
■ LA Down conductor length.
■ Earthing Cable Length from PV Array, Inverter to Earth pit

9. Electrical Details of the site
■ Interfacing Voltage Range
– For Residential Purpose (1 Phase/3 phase)
– For Commercial purpose (LT Voltage/HT Voltage) with Voltage Range.
■ Get Client Electrical SLD ( where we need interface)
■ Availability of Spare Feeder (to feed our generated solar energy)
- If Not, Check Provision (Space) to place new spare feeder
- Get the details about Spare feeder (Client Scope or Swelect Scope)
■ Existing DG Details (Make,Capacity, RPF Relay Availability)
■ Load Details
– Base Load
– Peak Load
■ Power Shedding Time (if any)

10. Sample Client Electrical SLD

11. LT Panel With Spare Feeder Provision for Spare

12. Load Curve

13. Ground Mount System
■ Site Geographical Coordinate (Latitude & Longitude)
■ Topographic Map/ Land Survey Details
■ Tree or any other Shadow Objects (Transmission tower)
■ Site Condition
– Any rocks available ( Which makes MMS Foundation work complicated)
– Land Levelling required or Not ? ( Scope of Land Levelling)
■ Soil Test Report
■ Interfacing Voltage Range (11KV/22KV/33KV)
■ Distance between nearby substation and Plant

15. Example Site Survey

16. Example Site Survey