Whether the solar battery is depleted or not can be judged by the following methods:
a. Observing that the load of the lighting bulb is red, the TV image is reduced, and the voltmeter on the solar panel controller indicates that the voltage is lower than the rated voltage;
b. The density of the electrolyte obtained by measuring with an electrolyte hydrometer is reduced. The solar cell battery is discharged by 25%, and the density is decreased by 0.04 g/cm3;
C. Test the voltage value of the solar panel when discharging with a discharge fork. The voltage value held within 5 s is the terminal voltage at the time of load discharge of the current load discharge fork voltage on the flow. The degree of charge and discharge of the battery and the required degree of the electrolyte, when using the discharge fork, shall not exceed 20 s each time.
Rechargeable charging of solar battery When the battery is found to be in a deficient state, measures should be taken immediately to recharge the battery. In places where conditions permit, the charger can be recharged; if it cannot be charged by the charger, it can also be charged by the solar array.
The specific method of using the solar panel square array to recharge is to turn off all the electrical equipment in the presence of the sun and charge the battery with the square array of solar panels. According to the size of the power, the battery can be fully charged by charging continuously for 3 to 7 days. The sign that the battery is fully charged is that the density of the electrolyte and the battery voltage are all restored to normal; the battery inlet has severe bubbles. The powered device can only be activated after the battery has returned to normal.