SOLARPVSIZER

Solar PV System Sizing Report
Sun Power 2025-12-08

Report generated by SOLARPVSIZER.COM

Generated:

Your Inputs

A summary of the information you provided to calculate your system size.

    Potential Production (Units or kWh) per month

    The chart below shows the monthly potential output in kWh or "Units" of your solar panels, assuming the energy has somewhere to go. If your battery is full and your electricity usage is low, the panels won’t be able to produce at their maximum capacity.

    Annual load : – kWh
    Average monthly production : – kWh
    Best month production : – kWh
    Worst month production : – kWh
    Site yield : – kWh / kWp / yr

    Assumptions – Standard Test Conditions

    Panel temp : 25 °C
    AM: 1.5
    Irradiance : 1000 W/m²

    System Recommendation & Layout

    Ball-park sizes for array, inverter and battery. You can work with your installer/EPC to fine tune these.

    How we calculate these sizes

    Inverter rating

    Any design that contains a battery is classed as a hybrid system, so the inverter must supply both solar power and household loads during an outage. We therefore never recommend less than 5 kW even if the array alone could run on a smaller grid-tie unit.

    Any system with a battery needs a hybrid inverter of at least 5 kW, and the battery bank is enlarged when necessary so it can supply that power.

    Battery capacity

    Storage is sized for your chosen backup hours; we then make sure the bank can deliver the inverter’s full power. Modern lithium batteries are rated at 1 C, so the kilowatt-hours must be at least equal to the inverter kilowatts. If the autonomy calculation gives a smaller figure, we round the battery up to match.

    Array power

    Panel wattage meets your annual kilowatt-hour target for this location. To future-proof for an electric vehicle or appliance growth, upsizing the array by 15 – 25 percent is a safe buffer.

     

      The diagram below shows a typical system layout. The grid connection is optional as is the battery bank.

      Local installers who can quote you

      Installers are independent service providers. We do not guarantee pricing or workmanship.

      Fine-tune assumptions

      You can change some of your initial assumptions here without having to generate a whole new report.