The need for solar energy to recharge has nothing to do with the structure of the solar panel. It has nothing to do with the battery either.
This is related to the power conversion circuit.
The output voltage of the solar panel changes and this voltage cannot directly charge the battery.
A power conversion circuit is required to convert this voltage into a stable voltage.
Once a stable voltage is obtained, the battery can be charged via the charging circuit.
200 watts is the maximum power.
If we use a 20v battery to absorb it, it's 10 amps. This battery must be able to support at least 10 amps.
If you use a 40V battery, the battery should support a current of 5A.
The above is the current limit of the battery.
Assume the solar panel can provide 200W*8H of power, or 1600V aH. If it is a 16V battery, lhe battery capacity should be at least 100AH to fully absorb the energy from the solar panel.
If it is a 32 V battery, the battery capacity should be 1600/32 = 50 Ah. Current resistance limit 200/32 = 6.25 A.
The above content is an ideal state, taking into account safety redundancy and conversion efficiency.
The actual design requires a safety margin.