All Solar Calculators
Every tool runs on the same engineering engine, entirely in your browser. Start with the complete calculator, or jump to a specific tool.
Complete Solar System Calculator
Full design: size, panels, inverter, battery, cable and tilt in one flow.
Open →Solar System Size Calculator
kW, panel count and roof area from your monthly units — worldwide.
Open →Solar Panel Calculator
How many panels for your system size, and the roof space they take.
Open →Inverter Size Calculator
Continuous rating with startup surge, plus the right inverter type.
Open →Battery Bank Calculator
Lithium vs lead-acid sizing for your backup load and hours.
Open →Cable Size & Voltage Drop
Copper cross-section, drop % and line loss for any run.
Open →Will It Run?
Will your AC, pump or appliance run on a given system size — startup surge included.
Open →Quotation Checker
Before you sign: every quoted component gets an engineering verdict against your real needs.
Open →System Health Check
Already installed? Compare actual generation against what your system should produce.
Open →Net Billing Comparison
Right-sized vs oversized under net billing: savings, payback and marginal economics side by side.
Open →Roof Area Calculator
Start from your roof: what fits, in kW and panels, plus expected generation.
Open →Payback Period Calculator
Check any quotation: monthly savings, break-even time and 25-year value.
Open →Tilt Angle & Direction
Best fixed and seasonal tilt for your latitude, plus true direction.
Open →Choosing between two sizes rather than a tool? See the system comparisons — panels, roof area and generation side by side.