Youre installing solar on a warehouse roof. Its a 250KW installation. Its expected to last 30 years, and provide 1,800kW-h/day of power. Power costs you $.14/kW-h.in sunny San Diego. You also need to replace inverters in years 10 and 20, for $40,000 a pop. Assuming a 6% discount rate, and assuming monthly power bills, whats the most youd pay for this installation? (For simplicity, assume a 30d month.)