> No coal trains in India except Heritage pieces.[1] Sorry, I meant diesel. > The Diesel ones have an Auxiliary power units to save Diesel which they are haul

> No coal trains in India except Heritage pieces.[1] Sorry, I meant diesel. > The Diesel ones have an Auxiliary power units to save Diesel which they are hauling around anyway now. Your point of hauling around batteries and equipment even now happens in all Diesel locos with multiple compressors and stuff. Consider the energy density of diesel versus a lithium ion battery. Now consider the weight of an array of solar panels versus a small diesel generator. It's a great deal of weight gain. The compressors you carry are a sunk cost and are irrelevant. The weight gains just put more work on the locomotives diesel engine. You will use more diesel in one location. > The Solar changes will mostly augment the Diesel units progressively thus strategically reducing dependence on Diesel, which India is a huge importer every year. You're not reducing diesel consumption. You're just moving it from an array of generators to the engine.