Costs and Finance

System Costs
-Assumptions-
Development Costs = $3,500/kw
Transmission Costs = $30,000
Total System Cost= $3,500(58.8 kw)+$30,000
                                 =$235,800 
 Source: Steve Crowe, Alterna and author's own computations

Finance Exploration
-Assumptions-
Down Payment = $100 per family
Interest Rate = 5%
Expected Annual Maintenance Costs = $10,000
Inflation = 2%
Families Involved = 136
30 year loan, 12 payments per year
7.85 Quetzales/USD
Ignore local tax policy for now

Month 1 
 Mortgage: $1,192.82 (Q 9,363.64)
Interest: $925.83 (Q 7,267.77)
Principal: $266.98 (Q 2,095.79)
Outstanding Loan: $221,933.02 (Q 1,742,174.21)
Estimated Operating and Maintenance Costs: $834.72 (Q 6,552.55)
PV Monthly Payment: $1,099.87 (Q 8,633.98)
PV Monthly Payment Per Family: $8.09 (Q 63.49)

Month 360
Mortgage: $1,192.82 (Q 9,363.64)
Interest: $4.95 (Q 38.86)
Principal: $1,187.87 (Q 9,324.78)
Outstanding Loan: $0.00 (Q 0.00)
Estimated Operating and Maintenance Costs: $1,517.67 (Q 11,913.71)
PV Monthly Payment: $1,485.57 (Q 11,66172)
PV Monthly Payment Per Family: $10.92(Q 85.72)

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