⚠ No Compliant System Found
With the selected inputs and available hardware, no system meets all design requirements.
⚡ Load Builder
Total: 0.00 kW peak · 0.0 kWh/day
Quick Templates
Add Appliance
Your Load
No appliances added yet — click a template or appliance above.
☀️ Solar Array
🔋 Battery
⚡ Inverter
💰 Financials
🌿 Environment
📋 Generate Proposal
Required Solar Array (DC)
—
Est. Daily Solar Production (Net)
—
Array Details
Peak Sun Hours (Design GTI) —
Performance Ratio (SA spec) 80%
System Availability (SA spec) 97%
Required Solar Energy (kWh/day) —
Panel Footprint (m²)
Annual Solar Production (Net) —
Specific Yield (kWh/kWp/year) —
Generation Assumptions
Location GTI (Design Value) —
Panel Orientation —
Performance Ratio (PR) 80% — thermal losses, wiring resistance & module mismatch
System Availability 97% — maintenance & downtime allowance (SA grid spec)
Combined Yield Factor —
Temperature & Soiling Derating Included in PR — assumes quarterly panel cleaning
Reserve Margin None applied — panel count rounds up; oversizing provides buffer
⚡ System Compliance — Solar · Battery · Inverter · DC/AC — All must pass
—
Battery Power During Outage
—
Evening Energy Required
—
Solar-off backup period only
Battery Installed Capacity
—
Cross-System Compliance Check
☀️ Solar covers daytime load + battery recharge —
🔋 Battery power output ≥ peak load —
⚡ Inverter AC rating ≥ peak load × 1.3 safety margin —
🔄 Daily depth of discharge ≤ 85% (LiFePO4 spec limit) —
📐 DC/AC ratio within NRS 097-2-1 range (1.0–1.5, target 1.3) —
Battery Model
Selected Battery —
Chemistry LiFePO4 — max 85% DoD
Round-Trip Efficiency 92% (SA spec)
Capacity per Unit (Usable kWh) —
Headroom Ratio (Installed ÷ Required) —
Capacity Headroom
🔧 Revise Design
Recommended Inverter
—
⚡ Run a design to check compliance
MPPT & String Allocation
PV String & Inverter Compatibility —
String Allocation —
MPPT Utilisation —
Inverter Performance
Inverter AC Continuous (kW) —
Max DC Input (kW) —
Headroom over Backup Peak —
Efficiency —
Regulatory Compliance
NRS 097-2-1 Grid Connection Standard
Run a design first ⚡
DC/AC Ratio vs NRS 097 (target 1.3:1, max 1.5:1) —
NERSA SSEG Registration Required —
DC / AC Ratio Visual
Recommended Total System Cost
—
Est. Year 1 Electricity Savings
—
Total Hardware (Panels + BOS)
—
Cost Breakdown
25-Year Financial Model (SA Compliance Rates)
Monthly Savings (Year 1) —
Annual O&M + Insurance (2% of capex/year) —
Battery Replacement Cost (Year 10 @ 70%) —
Real Payback (escalating tariff, incl. all costs) —
NPV @ 12% Discount Rate (25 yr) —
IRR (25-year) —
Gross Lifetime Savings (25 yr, escalating) —
Net Lifetime Savings (after O&M + battery replacement) —
Annual ROI % (Year 1 gross) —
Annual Consumption (kWh) —
Tariff Escalation Assumptions (NERSA)
2026 Escalation 8.76%
2027 Escalation 8.83%
2028 onwards 5.00% per annum (conservative)
Energy Independence
Annual Solar Production (Net) —
Annual Consumption —
Client Segment —
Solar Independence
Client Details
Client Type
🏠
Residential 4-page homeowner proposal
🏢
Commercial 8-page technical proposal — NPV, IRR, NERSA
🏠 Homeowner PDF: Plain language — savings, payback, backup hours, installation steps.
System Summary
System Run calculation first ⚡
Total Cost —
Annual Savings (Year 1) —
NPV (25yr @ 12%) —
Payback (real, incl. all costs) —
AI-powered proposal via Nova Metrics pipeline.🏠 Homeowner PDF — clear, simple, deal-closing
Generate Proposal
The proposal has been generated and saved. Open the Proposal Portal to review, send, or download the PDF.