Financial & Technical Analysis for SA Farms & Businesses (Rands)
Enter average kWh consumed per hour. Enter a negative value for an hour where existing grid-tied solar exported surplus to the utility — it is modelled as PV production available to the battery.
Note: Weekly operation graph displays a typical week.
Avg Monthly Consumption
PV Array Size
Battery Size
Avg Monthly Bill (Before)
iMonthly electricity bill without the system.Avg Monthly Bill (After)
iMonthly bill after installing the system.Energy Savings (Avg/mo)
iHow much you save on electricity each month.Monthly Free Cashflow
iCash left over each month after all costs. Positive = saving money.Blended LCOE
% Energy from Grid
iHow much energy still comes from the grid.PV Curtailment
iSolar energy wasted (not used or stored). Lower is better.Demand Savings (Avg/mo)
iSavings from reducing peak demand (kVA) charges.Total System Cost
iTotal cost of the solar + battery system.Discounted Payback
iYears until the system pays for itself.20-Year NPV
iTotal profit in today's money. Positive = good investment.Project IRR
iAnnual return on investment. Compare to bank rates.20-Year ROI
iTotal profit as % of system cost over 20 years.Bill before system
todayBill after system
with solarAdjust the inputs on the left and click "Run Simulation" to see your results.
Running simulation...