Solar Calculator Saudi Arabia 2026

Solar Economics in Saudi Arabia: Great Sun, Cheap Grid

Saudi Arabia offers world-class irradiance — around 4.7-5.0 kWh per kW of panels per day in Riyadh, Jeddah and Dammam — yet residential solar payback here is slower than almost anywhere with comparable sun. The reason is the subsidised tariff: Saudi Electricity Company (SEC) charges 18 halalas per kWh for the first 6,000 kWh each month and 30 halalas above that. When grid power costs SR 0.18, every solar kilowatt-hour simply saves less. The households that genuinely benefit are large villas whose consumption regularly crosses into the 30-halala slab, especially through the AC-heavy summer. Compare both slabs in the solar savings calculator before believing any installer pitch.

WERA Net Billing: Self-Consumption Is Everything

Distributed solar is governed by the Water and Electricity Regulatory Authority (WERA, formerly ECRA) under a net billing scheme — not net metering. Self-consumed energy offsets your full tariff, but surplus exported to the grid is credited at a low fixed rate, around 5-7 halalas per kWh under recent frameworks. Exporting is therefore worth only a fraction of self-use, and systems should be sized so most generation is consumed on-site during the day. The system size calculator and the solar AC calculator help match array size to daytime cooling load, which is where Saudi homes burn most of their power.

Worked Example: 8 kWp Villa in Riyadh

An 8 kWp system at roughly SR 4.5 per watt costs about SR 36,000 installed. At 4.9 kWh/kW/day it yields near 14,300 kWh a year. For a high-consumption villa offsetting the 30-halala slab with 65% self-use and exporting the rest at 5 halalas, annual savings come to roughly SR 3,000 — a payback around 11-12 years. The same system offsetting only the 18-halala slab saves nearer SR 1,960 a year, stretching payback past 16 years. That matters: in Saudi Arabia solar is a 25-year infrastructure decision, not a quick win.

The SEC Application Process

• Use a certified contractor registered for small-scale solar work; self-installation is not permitted for grid connection.
• The contractor submits the application to SEC for technical approval and grid-connection consent.
• SEC installs a bidirectional meter and applies net billing to subsequent invoices.
• System capacity limits and eligibility rules apply — confirm current thresholds before design.

Caveats

Desert dust soiling can cut output 10-20% without regular cleaning, so derate estimates in the solar output calculator accordingly. Tariffs, export credits and connection rules are subject to revision as the Kingdom reforms energy pricing — a future tariff increase would shorten payback substantially, but plan on today's numbers and verify current terms with WERA (wera.gov.sa) and SEC. Check usable space first with the roof area calculator, since shading from parapet walls and water tanks is a common villa problem.

Solar calculators for other countries

Localized subsidy and tariff math for more markets:

Frequently asked questions

It depends on your slab. Villas that regularly exceed 6,000 kWh a month and pay 30 halalas/kWh can see 11-13 year paybacks on a 25-year system. Homes staying within the 18-halala slab face 16+ year paybacks and should size conservatively.

Under WERA's net billing rules, exports earn a low fixed credit — around 5-7 halalas per kWh in recent frameworks, versus the 18-30 halalas you pay for grid power. Verify the current rate with WERA, and design your system for maximum self-consumption.

Net metering offsets exports against imports kWh-for-kWh. Net billing, used in Saudi Arabia, values exports at a separate, much lower rate than the retail tariff — so a kWh you export is worth roughly a quarter or less of a kWh you use yourself.

Soiling from dust storms can cost 10-20% of production without monthly cleaning, and panel efficiency drops further in 45°C+ summer heat. Realistic Saudi estimates should use a noticeably lower performance ratio than European or US defaults.

About 15 kWh a day or 5,314 kWh a year on average, from about 13.2 a day in December to 15.6 a day in September, according to PVGIS data for panels at the best fixed angle. Shading, dust and orientation change the result.