After completing the purchase of your SolarBox or solar PV installation kit, the next essential step is to obtain legal permission from local authorities. This process ensures that you can legally utilize solar-generated electricity and enables you to sell any surplus energy back to the utility grid.
Conditions for Grid-Connection Approval
The installation of a SolarBox system under the residential rooftop category requires official approval from the relevant electricity authority if it meets the following criteria:
- The installed capacity is 3 kWp or higher.
- The total installation area does not exceed 160 square meters.
There are no official fees required for the initial installation permit application.
Required Documentation for Permit Application
To facilitate the approval process, the following documents must be prepared:
- Local Authority Notification Form: Standard document for notifying local administrative offices.
- ERC Building Survey Form: Official inspection form required by the Energy Regulatory Commission (ERC).
- Rooftop Photographs: Clear visual evidence of the designated installation area.
- Land Title Deed (Chanote): Proof of property ownership.
- House Registration (Tabien Baan): Copy of the registration for the property where the system is installed.
- Engineering Design Plans: A technical blueprint certified by a Professional Civil Engineer (Associate Level). This must include structural calculation reports (e.g., dead load and live load analysis) with an authorized signature verifying the building’s structural integrity.

