PVLedger: Solar Tools

About

PVLedger is a practical offline workspace for photovoltaic system preliminary design, field calculations and project documentation. 24 OFFLINE SOLAR TOOLS • PV array power and DC/AC ratio • Cold Voc string limit • Hot Vmp and MPPT compatibility • Parallel string current • Annual and monthly energy yield • Combined system losses • Specific yield and performance ratio • Battery bank sizing and runtime • Charge controller current • DC cable voltage-drop sizing • Single-phase and three-phase AC cable sizing • PV source overcurrent protection • Roof module fit and added dead load • Row shadow spacing • Solar self-consumption • Simple payback and simplified LCOE • Avoided CO₂ estimate SOLAR PROJECT WORKSPACE Create grid-tied, hybrid or off-grid solar projects. Enter module, string, inverter and production values, then review array power, annual energy estimate, DC/AC ratio and design consistency checks. Save calculator results inside projects and keep related calculations together. REPORTS AND BACKUP • Export project reports as PDF • Export calculation data as CSV • Create and restore JSON backups • Share files through the standard iOS share sheet PRIVATE AND OFFLINE PVLedger does not require an account, login or internet connection. The app contains no advertisements, subscriptions or in-app purchases. Calculations and project data are processed and stored locally on the device. Editable regional profiles for Europe, Türkiye, the United States and China provide convenient starting values. IMPORTANT PVLedger is a preliminary engineering design and calculation aid. Results must be verified using actual site conditions, manufacturer documentation, structural requirements and applicable local electrical regulations. The app does not replace professional engineering approval or regulatory certification.