public SolarVsUtilityProjection CalculateFutureProjection(
IYearlyKwhUsage solarEstimate,
ProjectionParameters projectionParameters
)
{
var projection = new List <IYearlyKwhUsageCompare>();
var utilityEstimate = projectionParameters.UtilityYear;
var paidOffSolarEstimate = new YearlyKwhUsageFromAnnual(
0, solarEstimate.TotalKiloWattHours
);
// Each year to project
for (int i = 0; i < projectionParameters.YearsToProject; i++)
{
projection.Add(new YearlyKwhUsageCompare(
FormulaHelpers.CompoundInterest(utilityEstimate.TotalCost, projectionParameters.PercentIncreasePerYear, 1, i),
utilityEstimate.TotalKiloWattHours,
i,
// After financeYears, solar panels are no longer paid for
i < projectionParameters.FinanceYears ?
solarEstimate : paidOffSolarEstimate
));
}
return(new SolarVsUtilityProjection(solarEstimate, projection, projectionParameters.FinanceYears));
}
public SolarVsUtilityProjection(
IYearlyKwhUsage solarEstimate,
List <IYearlyKwhUsageCompare> futureProjection,
int financeYears
)
{
SolarEstimate = solarEstimate;
FutureProjection = futureProjection;
FinanceYears = financeYears;
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="utilityYear">A utility year's <see cref="IYearlyKwhUsage"/>.</param>
/// <param name="yearsToProject">The number of years to project into the future.</param>
/// <param name="financeYears">The number of years the mortgage is active.</param>
/// <param name="percentIncreasePerYear">The change in kw/h cost per year.</param>
public ProjectionParameters(
IYearlyKwhUsage utilityYear,
int yearsToProject,
int financeYears,
double percentIncreasePerYear
)
{
UtilityYear = utilityYear;
YearsToProject = yearsToProject;
FinanceYears = financeYears;
PercentIncreasePerYear = percentIncreasePerYear;
}
public YearlyKwhUsageCompare(
double totalCost,
int totalKiloWattHours,
int purchaseYear,
IYearlyKwhUsage solarProjection
)
: base(totalCost, totalKiloWattHours)
{
PurchaseYear = purchaseYear;
SolarProjection = solarProjection;
CostSolar100Percent = CalculateTotalCost(1);
CostSolar90Percent = CalculateTotalCost(0.9);
CostSolar80Percent = CalculateTotalCost(0.8);
TotalSavings100Percent = totalCost - CostSolar100Percent;
TotalSavings90Percent = totalCost - CostSolar90Percent;
TotalSavings80Percent = totalCost - CostSolar80Percent;
}