How do I choose a reliable solar street light manufacturer in India for my project?

I am currently researching solar street lighting options for an outdoor project and want to understand what factors should be considered before selecting a manufacturer or supplier in India.

There are many companies offering solar street lights, but I am mainly interested in comparing the actual technical specifications rather than choosing only on price. For example, how important are the solar panel capacity, LED wattage, battery capacity, backup time, charging efficiency, and weather protection?

I also came across both all-in-one and semi-integrated solar street lights. An all-in-one system combines the solar panel, LED, controller, and battery into one compact unit, while a semi-integrated system has a separate solar panel with the LED and battery unit. I would like to know which configuration is generally more suitable for roads, housing societies, industrial areas, parking spaces, and campuses.

Another point I am considering is after-sales support. For a larger project, installation assistance, product warranty, maintenance support, and availability of replacement components can be just as important as the initial product price.

I have also been looking at companies such as Zitroen IoT, which provides solar street lighting solutions from Pune for residential, commercial, industrial, and infrastructure applications. Their range includes semi-integrated and all-in-one solar street lights along with solar high mast lights, solar flood lights, and solar blinkers.

For anyone who has purchased or installed solar street lights in India, what specifications and service factors did you compare before selecting a solar street light manufacturer or supplier?