English:

Sunlight shining on solar panels is used to charge a battery. Energy from the sun is used to power a load. The load can be anything, like lights, a water pump, a propeller, a refrigerator, or a heater. . The total current charging the battery depends on the sunlight. At low sunlights, the current, and the power is low. The most power is always delivered to the battery.

Technical:

In this example 4 solar panels are used. The total voltage is 2*18.4=36.8V. Power maximum=860 Watts.

The Solar Panel Voltages must be less than the charging voltage of the battery. VIN<VOUT

The total current charging the battery depends on the sunlight. At low sunlights, the current, and the power is low. Always the most power is delivered. It could be as low as 1 watt.