roofwise.SAUDI SOLAR FEASIBILITY
SOLAR INVESTMENT INTELLIGENCE

What if your roof
paid for itself?

Estimate your solar savings with an hourly Saudi weather model, realistic household demand and transparent long-term economics.

01  Your electricity02  Your solar roof03  Your return
Preparing your solar analysis…
Net present value↗
—

25-year discounted return

Discounted payback◷
—

6.5% real discount rate

Annual savings﷼
—

Year 1 · bill savings + exports

PV system size☀
—

Grid-connected, no battery

HOURLY ENERGY PROFILE

Your home, hour by hour

Typical weekday load versus solar power at your selected rooftop orientation

Home demandSolar generation
PRODUCTION & CONSUMPTION

Annual energy balance

Monthly solar energy used or exported

Self-consumedExportedImported
INVESTMENT SNAPSHOT

Economics at a glance

Assumptions and the economics of your system

Initial investment—
Annual solar energy—
Solar self-consumption—
Annual exports—
Lifetime ROI—
Levelized cost (LCOE)—
Update your inputs to explore the economics.
THREE-PHASE GRID CONNECTION

How your rooftop solar works

PV connects through a dedicated AC breaker on the load side of the three-phase service panel

230 / 400 V · 3Φ
Three-phase rooftop solar load-side grid interconnectionRooftop PV panels supply a three-phase grid-tied inverter and AC isolator. A solar breaker connects on the load-side bus inside the three-phase distribution panel, which also supplies home loads and receives utility power through a bidirectional meter and main breaker. ROOFTOP PVDC array 3Φ INVERTERDC → ACGrid-following ACIsolator SERVICE PANELThree-phase distribution boardPV breakerMain CBLOAD-SIDE BUS UTILITYBi-directional meterHOME3Φ loads DCAC3Φ ACGrid ↔ home
Solar supplyGrid import / exportHome loadsConceptual only. Final connection requires utility approval, equipment coordination and compliance with applicable Saudi codes.
25-YEAR FINANCIAL OUTLOOK

Your investment over time

Yearly net cash flow and cumulative discounted return

Annual net cashflowCumulative discounted return
View year-by-year cash flow 25 years
YearPV kWhEnergy savingsExport creditO&MReplacementNet cash flowDiscounted CFCumulative NPV

Model assumptions & decision guidance

Tariff model: imports are charged at 0.253 SAR/kWh for the first 6,000 kWh per month and 0.3795 SAR/kWh thereafter; exported energy is credited at 0.07 SAR/kWh. Actual statements, fixed charges and settlement rules may differ.

Solar model: 8,760 hourly observations, Perez tilted-plane model, temperature correction, 3% shading loss, 0.95 DC factor, 0.88 system efficiency and inverter clipping at DC/AC 1.2.

Financial model: 25 years, 6.5% discount rate, 0.7% annual module degradation, annual O&M at 1% of initial cost, and a provision for inverter replacement (10% of CAPEX) in year 15. Tariffs and usage held constant in real terms.

Load model: estimated hourly demand derived from your 12 monthly values and the provided typical weekday/weekend summer/winter curves; summer A/C represents 75% of the modeled summer demand. Not a measured smart-meter curve.

Legal notice: This calculator is an indicative decision-guidance tool, not an engineering design, investment guarantee, official utility quotation, tax opinion, or assurance of regulatory eligibility. Results depend on assumptions and historical observations. Obtain a site survey, shading assessment, structural and electrical design, current tariff confirmation, and approval from the relevant utility and qualified professionals before investment or interconnection.