Solar Charging Time Calculator

The "Smart Solar Charging Time Calculator" is tailored to your solar charging needs. The calculator is not only an efficient and practical tool, but also a powerful assistant for exploring green energy and optimizing your charging plan. Whether you're planning a long outdoor adventure to charge your electronic devices, a backup power source for your home in the event of an unexpected power outage, or improving the energy efficiency of your smart home solar system, this calculator will help you keep track of your charging time and enjoy a greener, smarter lifestyle with accurate data support and convenient operation.

Solar Charging Time Calculator











Variable definition

  • Solar panel power (P_panel in Watt, W): The maximum output power of the solar panel under standard test conditions (STC, usually 1000 W/m² light intensity, 25°C cell temperature).
  • Battery capacity (C_battery in Ampere-hour, Ah or Milliampere-hour, mAh): the total amount of power that the battery can store. Note that mAh needs to be converted to Ah (e.g. 1000mAh = 1Ah).
  • Battery voltage (V_battery in Volt, V): the operating voltage of the battery. This is usually the nominal voltage provided by the battery manufacturer, but may vary during the actual charging process.
  • Light intensity (I_light, in Watt per square meter, W/m²): the intensity of light received by the solar panel. This can be measured in real time or predicted based on geographic location and seasonal variations.
  • System efficiency (η_system, unit: n/a, expressed as a percentage, to be converted to decimal form for calculation): the efficiency of the whole system, including the conversion efficiency of the solar panels, the efficiency of the inverter, the cable losses etc. For example, if the system efficiency is 80%, then η_system = 0.8.

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mAh to Ah calculator