Power Junxion · Solar ROI Tool
Quic-Calc
Free Estimate Quote - No Contact Details Required.
User Inputs
What phase do you have?
Single Phase · 80A · Max: 18.4 kVA
Check DB board for the main breaker size (amps)
Monthly Bill
R
Monthly Usage
kWh/mo
Tariff Rate
R/kWh
fill any 2 fields
Renewable Energy Target
50%
% of monthly usage to offset with solar
Daytime Energy Use
50%
Moves inversely with night · always sums to 100%
Night-time Energy Use
50%
Moves inversely with day · drives battery sizing
Mounting Structure
Rooftop: rails & clamps · Ground mount includes steel frame structure & footings
Inverter
—
Unit Size
Daily Solar
—
Average
Generation
—
Per Month
Solar Peak
—
Required
PV Panels
—
× 610W
Battery
—
Storage
System Output
| FOX Tier | Inv kW | kWp | Panels | Battery | Cost Ex VAT | Sell Ex VAT | Inc VAT | Mo. Saving | Payback | Payback 12B | ROI 20-Year | ROI 20-Year+12B | Return |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
⚡
Click Calculate to generate |
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| Product | Part / Item | Description | Qty | Cost Price | Cost Ex VAT | Selling ×1.15 | Inc VAT ×1.15 |
|---|---|---|---|---|---|---|---|
|
📋
BOM populates after calculation |
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📈
ROI details after calculation
Terms & Conditions
This is a high level estimate only, excluding travel & accommodation costs.
All pricing is subject to site inspection, receipt of current electricity bills, and final engineering sign-off.
Prices are ex VAT unless stated and subject to change without notice.
© Power Junxion