Updated on January 3, 2024


Created on June 4, 2014

SELCO 50W Module

Upcoming Update

The SELCO 50 W is a solar home system that comprises a solar panel, a battery, lights and a fan.

Developed By
  1. SELCO
Tested By
  • Central Power Research Institute (CPRI)
Content Partners


Product Description

SELCO, or the Solar Electric Light Company located throughout India offers a series of solar home systems in which is included the 50 W system. The systems are custom designed to provide lightning and power household electrical appliances.

SELCO offers to put users in contact with financial institutions that help them finance energy products

Target SDGs

SDG 7: Affordable and Clean Energy

Market Suggested Retail Price


Target Users (Target Impact Group)


Distributors / Implementing Organizations


Competitive Landscape

Direct competitors include Trony Sundial TSL02 and Bright Box 2.

Manufacturing/Building Method

All components are mass produced but the systems are individually installed

Intellectural Property Type

Select Type

User Provision Model

SELCO energy services are provided to end users by their Energy Service Centers (ESC), which are located in small to mid-sized provincial towns throught India.

Distributions to Date Status

Exact number unknown but SELCO as of 2018 has reached 450,000 clients. These clients have bought at least one of SELCO's solar solutions.

Description of power outputs


Description of light points


Total lighting service (lumen-hours per solar-day)

3 – 4

Peak power rating (Wp)


Battery capacity (kWh; mAh)


Nominal battery voltage (V)


Battery type

Lead Acid Battery

User replaceable battery (yes/no)


Remote system diagnostics (yes/no)


Payment structure


Mobile service required (yes/no)


Design Specifications

The SELCO solar home system is composed of:

  • 50 W Solar panel, weather resistant with high-efficiency monocrystalline/polycrystalline cells
  • 80 Ah Battery, low-maintenance deep-discharge, tubular plate with hard rubber/polypropylene container
  • 3 - Compact Fluorescent Lights (5/7/11 watts)
  • 1 Fan

Product Schematics

Technical Support

Provided by the Energy Service Centers (ESC) in Karnataka, Gujarat, Maharashtra, Bihar, and Tamil Nadu. User training is provided via the installing technician, who provides information on how to do basic maintenance, interpret the charge controller, top up with distilled water, battery support, operation of fuses, etc.

Replacement Components

Replacement components are available through service technicians working out of the 45 service centers in Karnataka, Gujarat, Maharashtra, Bihar, and Tamil Nadu.


Lifespan and warranties:

  • Solar Panel: estimated life between 15-20 years with a warranty of 8 years
  • Battery: estimated life between 6-8 years with a warranty of 3 years

Manufacturer Specified Performance Parameters


Vetted Performance Status

Performance vetted by the Ministry of New and Renewable Energy, the MNRE document outlines some overall PV System requirements. MNRE (Indian govt ministry) testing has been done at the Central Power Research Institute (CPRI) for Selco systems. The individual components are also separately tested and certified by the manufacturers. Interview with representative


Improper knowledge of operation of charge controller could lead to damage or electrical fires. Possibility of exposure to battery acid if maintenance is not conducted properly must be take in consideration.

Complementary Technical Systems


Academic Research and References

Majority of research focuses on the financing and business model SELCO uses to distribute its product, or is a general review of the home solar system market landscape in India. No research found regarding system performance.

Brine, D.C., 2010, Social enterprise as a rights-based approach to development : a comparative study of two organizations, Cambridge (MA): Massachusetts Institute of Technology

Jue, D.M., 2012, From the lab to the land: social impact technology dissemination in rural southern India, Cambridge (MA): Massachusetts Institute of Technology

Chaurey, A., Kandpal, T.C., 2010, Assessment and evaluation of PV based decentralized rural electrification: an overview. Renewable and Sustainable Energy Reviews.,14(8), pp. 2266-2278.

Shrimali, G., Rohar, S., 2012, India’s solar mission: a review. Renewable and Sustainable Energy Reviews., 16(8), pp. 6317-6332.

Bhargava, B., 2001, Overview of photovoltaic technologies in India. Solar Energy Materials and Solar Cells. 67(1-4), pp. 639-646.

Compliance with regulations

Meets MNRE (Indian government ministry) standards. Interview with representative

Evaluation methods

MNRE (Indian government ministry) standards: The main objectives of the program are: supporting RD&D to make systems more reliable and cost-effective, demonstration, field testing, strengthening manufacturing base. MNRE (Indian government ministry) standards: The main objectives of the program are: supporting RD&D to make systems more reliable and cost-effective, demonstration, field testing, strengthening manufacturing base. Interview with representative

Other Information

SELCO also offers other products like solar inverter systems, solar water heaters and DC home appliances.

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