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November 19 , 2021

How to select Solar Street Light Manufacturer in India

We intend to provide you an un-biased, rational and transparent way to select Solar street light manufacturer in India. We hope that after reading this write-up you will be able to find a trustworthy supplier of Solar street lights at low cost without compromising on product quality and after sales support.

We assume that you are trying to find a reliable Solar street light manufacturer for your government tender or private customer requirements. For government tenders, you will be having a technical specification sheet which comes with the tender document. However, for a private customer requirement, you will have to suggest the product specifications to the customer depending upon the application. Sometimes the customer suggests the wattage of required LED light and rest of the system needs to be designed for providing proper solar light backup throughout the year. Here “throughout the year” is a really important consideration which requires proper system design considering rainy / foggy / cloudy days which might occur randomly throughout the year.

As you must be aware, Solar lights can function properly only when the solar panel receives sufficient sunlight to charge the battery. Even on foggy / cloudy / rainy days, where there is diffused sunlight, the solar panel might charge the battery 20% to 50% as compared to a clear bright day. Generally, a well designed solar light will be able to provide full night of backup and still be left with 20% – 30% of the battery charged. This is important since the left over charge in battery can be bonus power if next day is foggy / cloudy / rainy. So, the left over charge in the battery added to next day’s battery charging in diffused light condition should be enough to power the light for one more night.

Some important points in a well designed solar light are as follow:

  • The Solar panel wattage should be sufficient to charge the battery 80% to 100% in 1 day of clear sunshine
  • The power of LED light should be such that after consuming battery charge for 1 night backup, the battery still holds 20% – 30% charge
  • LEDs should be mounted on a proper heat sink to dissipate generated heat properly
  • The product should actually offer technical specifications claimed by supplier. Some Chinese / Indian products are under-rated in terms of battery capacity / LED wattage / Solar Panel wattage and fail if customer does technical testing of the product
  • Product should be stable and not prone to frequent failure
  • The solar street light manufacturer should be stable enough to honor product warranty (This is very important for government Tenders, where 5 year warranty is to be offered by installers / tender awardees)
  • Product packaging should be robust for safety during transportation
  • Product should be able to withstand high wind conditions

Keeping above points in view, prime importance must be given to selecting a well established solar street light manufacturer . In recent times, many smaller suppliers have entered the market of Solar lights. These smaller suppliers generally aggregate various components of Solar light and then simply assemble the product and supply in market. Mostly, none of them follow any Quality Assurance procedures and also are not able to provide after sales support in terms of repair / replacement of faulty parts during warranty period / post warranty period. Mostly such suppliers enter the market with the motive of one time supply of light and keep changing their businesses / product offerings. Although such suppliers offer low pricing, which attracts buyers, but in the long term the buyer has to suffer penalties / loss in reputation in cases where sales support is to be provided.

We recommend that before finalizing the supplier, you should always visit the supplier, to ascertain that proper manufacturing infrastructure is present with the supplier and that the supplier follows proper Quality / Testing procedures.