Advanced Solar Engineering Toolbox
25+ practical calculators are visible here. The professional versions expose engineering inputs instead of hiding the calculation behind a single number.
PV System Sizing
Daily energy, PSH, performance ratio and system losses.
Open calculator →02AC/DC Voltage Drop
Professional drop check with R, X, PF, phase, conductor temperature and length.
Open calculator →03DC Cable Sizing
Ampacity + derating + voltage-drop selection for PV DC circuits.
Open calculator →04AC Cable Sizing
Single/three-phase cable selection with PF, derating and voltage-drop checks.
Open calculator →05PV String Voltage
Voc/Vmp with temperature coefficient and inverter window.
Open calculator →06DC/AC Ratio
Array oversizing relative to inverter AC capacity.
Open calculator →07Battery Sizing
Load, autonomy, DoD, efficiency and usable energy.
Open calculator →08Inverter Sizing
Load, peak demand, PF and design margin.
Open calculator →09Annual Generation
Annual energy and specific yield.
Open calculator →10Specific Yield
kWh/kWp-year performance metric.
Open calculator →11Performance Ratio
Measured/reference energy comparison.
Open calculator →12PV Degradation
Long-term output model.
Open calculator →13Module Count
Module quantity from target capacity.
Open calculator →14Roof PV Capacity
Usable area and module dimensions.
Open calculator →15Energy Consumption
Load × hours energy estimate.
Open calculator →16Solar Savings
PV energy × tariff estimate.
Open calculator →17Simple Payback
Project cost / annual savings.
Open calculator →18Row Spacing
Preliminary row-to-row geometry.
Open calculator →19Transformer Sizing
kVA from active power and PF.
Open calculator →20Battery Backup
Runtime from battery energy and load.
Open calculator →21Cable Current Check
Design current vs available ampacity.
Open calculator →22Tilt / Azimuth Helper
Preliminary orientation check.
Open calculator →23Load Analysis
Load profile and daytime energy logic.
Open calculator →24Short-Circuit Current
Preliminary current basis; verify protection study.
Open calculator →25Payback & Yield
Economic screening.
Open calculator →Professional cable workflow
For cable selection, do not stop at ampacity. Check design current, correction/derating factors, conductor temperature, voltage-drop percentage, conductor material, installation arrangement, protective-device coordination and the governing standard/manufacturer table.
Open Voltage Drop → DC Cable Sizing → AC Cable Sizing →