In what configuration are the individual cells in a solar panel connected together?
Why A single silicon photovoltaic cell only develops about 0.5 V regardless of its size, so cells must be stacked in series to reach a useful voltage - roughly 36 cells in series for a nominal 12 V panel. Larger panels then place strings of series cells in parallel to raise the available current. That combination of series strings wired in parallel is a series-parallel configuration.
Watch out Shunt, bypass and full-wave bridge are all terms borrowed from other circuits; bypass diodes are indeed used across cell groups to protect against shading, but they are added components, not the way the cells themselves are interconnected.
Series for volts, parallel for amps - a panel needs both, so series-parallel.