Automated PV design & instant proposals
Enter the site load once. Stonegrid sizes the array, inverter and battery, then prices a full bill of quantities in ZAR for South Africa.
Array
11.55 kWp
Modules
21
Delivered total
ZAR 191,575
Payback
3.6 yrs
Site inputs
SHEET 01module 1.13×2.28 m
Electricity bills — consumption baseline
0 month(s) · insufficient
Upload 4–12 months of bills (PDF or photo — the figures are read automatically — or a CSV of period, kWh, amount, days, kVA). Every row stays editable, so you can correct a misread meter reading or model a future load before sizing.
| Period | kWh | Amount ZAR | Days | Max kVA | ZAR/kWh | |
|---|---|---|---|---|---|---|
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Metered daily load
0.0 kWh
0 kWh avg month
Blended tariff
0.00 ZAR
all-in cost of supply per kWh
Implied peak
0.0 kW
avg 0.0 kW · seasonality 0%
Design target
0.0 kWh/day
90% offset of metered load
Load at least 4 consecutive months of bills to establish a baseline.
Yield assessment — PVGIS P50 / P90
assumed PSH
Specific yield P50
1535 kWh/kWp
Assumed peak sun hours (no satellite lookup)
Specific yield P90
1306 kWh/kWp
combined uncertainty 11.7%
Annual energy P50
17,734 kWh
11.55 kWp array
Annual energy P90
15,083 kWh
lender case · min DSCR 1.14x
P50 is the central estimate; P90 is the one-year exceedance case lenders size debt service on. Financials currently run on the P50 yield of 17,734 kWh/yr at 2.96 ZAR/kWh (published grid tariff).