I need to design a Rainfall Driven Micro Hydro-Generating System
Under normal operation, the generating system is expected to produce 30 W at 12 V regulated DC
1st how to calculate the flow of rainfall
2nd: what are the formulas that I should use?
and what do I need to calculate?
The Attempt at a Solution
I found the formula P = net head x flow x g
I still need the remaining formulas