Calculation Reports You Can Review & Save
Turn OneCalcApp calculations into a clearer project record. Start with real inputs, review assumptions and engineering checks, then print or save the result as a PDF for preliminary use.
Solar PV Preliminary Design Report
Estimate required PV capacity, panel count, annual generation, savings and payback, then print or save a client-ready preliminary report.
Start reportCable Sizing Calculation Report
Use the cable sizing calculator to review design current, ampacity, derating, voltage drop and the selected practical cable size.
Start reportBattery Backup Calculation Report
Calculate load energy, usable battery energy, losses, DoD, battery Ah and practical backup recommendations.
Start reportInverter Sizing Calculation Report
Check theoretical inverter capacity, practical standard selection, loading and key sizing assumptions.
Start reportVoltage Drop Calculation Report
Document conductor resistance, current, route length, calculated voltage drop, loss percentage and PASS/FAIL status.
Start reportEarthing Preliminary Calculation Report
Run preliminary earthing calculations and keep the project inputs, assumptions and engineering warnings together for review.
Start reportWhat a preliminary report should contain
Start with the solar quote report
The Solar Quote & Savings Generator is the first dedicated report workflow. It converts monthly energy or bill data into PV capacity, module count, annual generation, savings and simple payback with transparent assumptions.
Open Solar Quote GeneratorImportant engineering limitation
These are engineering-grade preliminary calculations, not approved construction documents. Final design must be verified against project-specific site conditions, manufacturer datasheets, applicable standards, utility requirements and a qualified engineer where required.