There are 10 solar panels, and the following information is about them. The solar panels are expected to produce 2250 full load hours per year, the investment cost is 172 million dollars, and it is expected that the maintenance cost is 80 $/MWh. The production from the solar panels is expected to be 0.38 $/kWh. The lifetime of the solar panels is 20 years, with a discount rate of 4%.

1) Calculate NPV for the investment

2) Calculate the IRR