The recommended inductance range is 22-220μH. Values too low may lead to abnormal operation, especially at low voltages.
Coulombic efficiency, also known as charge-discharge efficiency, refers to the ratio of the discharged charge to the charged charge within the same cycle. For NiMH batteries, the Coulombic efficiency is generally taken as 66%, meaning a 1000mAh battery will have a charge of 1500mAh. This is affected by temperature and charge-discharge rates, and specific details can be found in the IEC 61951-2:2017 standard. In the IEC standard, the charging method for NiMH batteries typically uses 0.1C * 16 hours.
Peak Sun Hours, in this context, refer to the (average) total daily integral of solar irradiance, equivalent to the time a light source with an irradiance of 1kW/m² would continuously shine, measured in hours. This data can usually be obtained from local meteorological data platforms. In the photovoltaic industry, the average daily value for the most recent year is generally used.
Daily Usable Charge, the current calculation method is the product of the solar panel's daily charging capacity and the battery's Coulombic efficiency, with a maximum equal to the battery capacity.
* In actual testing, it has been found that the smaller the standard operating current, the longer the device operates at a current below the standard current when the battery is low. The endurance results can also be affected by factors such as temperature and charge-discharge rates, and there may be some margin of error. Feedback on actual data is welcome.
The official power consumption calculation formula for QX5252F is Pled = 2.5 * η * V²bat / L , where η is the conversion efficiency. The derived formula for input current should be 2.5 * V / L . However, in actual testing, it was found that this formula gives values higher than the actual ones. Therefore, the current input current calculation formula is 2.5 * η * Vbat / L , which allows for adjustment of η to achieve different conversion ratios.