You could try both ways to see what works best. Just make sure that the voltage is less than 60V (I think it can actually go up to 67V without faulting). Hopefully the current and voltage ratings of the panels are similar. If the voltage is too high, then you might have to put them in parallel. The current will be quite a bit higher if you wire them in parallel and you might need bigger wires. Just stay withing the 16V to 60V) input range and 10A input range. Since the input current limit is 10A, I think you will end up putting them in series. Let us know what you end up doing.
