adafruit_support wrote:The solar charger is really the better choice. Using a conventional charger for solar charging typically only works in ideal conditions. Too much load or a passing cloud will cause the panel voltage to collapse and disrupt the charge cycle.
adafruit_support wrote:I don't know a lot about charging lead-acid batteries. But I believe that two of those panels in series could handle it. You will probably need some blocking diodes to protect the solar panels from reverse current should they become shaded.