Solar collector things from a yard sale for fifty cents.
Spouse bought a dozen or more of those solar collector things from a yard sale for fifty cents (She sort of knew the seller who was moving and was just making a small donation while helping to remove the stuff from the yard.) They are small collectors, about 4X12 inches. Different sizes, different brands. No one know the history of the gadgets.
She's a pond pump for a goldfish pond. Can the solar things be used to run the pump? The pump is AC and came with a DC/AC converter gadget and she has a marine battery.
So, finally, the question. Should these solar collectors be strung together in parallel or series for charging the battery?