i'm an industrial engineer, i have worked in so many projects of solar energy. I'm from morocco, i guess since you work in this domain, you would know the size of this industry of making energy by solar ressources here in morocco. Most of the biggest projects here are about renewable energy, therefore it's easy to find sources of information, they are all around. i'm skilfull in photoshop and design, the thing that will help me for sure to design this excel sheet you want.