Watt - Solar System Calculator

Don't overpay for a system bigger than you need — or buy one that dies at night. Watt sizes your solar system step by step: enter your appliances and outage hours, and get the right number of panels, battery capacity and inverter size. HOME CALCULATOR • Quick mode: an estimate in a minute from your average usage. • Detailed mode: add each appliance (AC, fridge, water pump…) and its hours. • Accounts for grid hours, generator and outage schedule. • Hybrid, off-grid and on-grid; single- and three-phase. TOOLS FOR INSTALLERS • Panel and battery calculators (lithium and gel). • Inverter sizing for your loads. • AC/DC cable gauge by current and distance. • Solar water pump sizing. • Best tilt and orientation for your location, with a compass. ROOF DESIGNER • Draw your roof and lay out panels, with shading and obstacles. • Monthly production estimate from solar irradiance data for your location. • Mounting structure design with a dimensioned drawing. • Export a PDF report to share with your installer. OFFERS & INSTALLERS (Iraq) • Request quotes and compare offers from installation companies. • Browse brands and products. Fully bilingual: Arabic and English. Note: results are estimates for planning. Electrical installation must be done by a qualified technician.