Money changes value over time because of its earning capacity and inflation. An accelerated ebook prioritizes the core cash flow conversion formula:

F=P(1+i)ncap F equals cap P open paren 1 plus i close paren to the n-th power : Present worth or initial capital investment. : Future worth accumulated after a specific timeframe.

| | Solar + Battery | Diesel Gen | |--------------|----------------|-------------| | Initial Cost | $25,000 | $8,000 | | Annual O&M | $500 | $2,500 | | Fuel cost | $0 | $3,000 (escalating 5%/yr) | | Lifespan | 10 years | 5 years (then replace) | | Salvage value | $2,000 | $500 | | MARR (hurdle rate) | 8% | 8% |

You need backup power for a remote telecom tower. Two options: