I got a Crypto company which was not making any profit for 40 hours in the past year due to power cuts, they are looking to implement a alternative power solution (solar system or generators). It's takes the company 480 minutes to mine. And the company makes a minimum amount of 5% of the invested capital(3.8 million) per block mined(from calculations I concluded that the company will mine an additional 5 blocks due to the installations so the projects will bring cash inflow of 950K ??, I'm not certain ) . Please assist with finding the NPV and IRR and to choose which one is the best option to implement (I got negative values for both but a decision is still needed)
Solar: 7.9 million installation fee, 50K per year maintance fee
Generator : 6 million installation fee, 100K maintenance fee per annum