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 void ShouldMatchActualUsageFromSampleData()
{
_subject = new YearlyKwhUsageFromAnnual(2357.22, 17019);
// Pulling expected values from spreadsheet calculations
Assert.AreEqual(196.435, _subject.AverageCostPerMonth, .01, nameof(_subject.AverageCostPerMonth));
Assert.AreEqual(0.1385052001, _subject.AverageCostKiloWattHour, .01, nameof(_subject.AverageCostKiloWattHour));
}
