Using the deck tiles allowed me to separate my yard without spending a lot of money or building a wood deck enabling me to build a stone step up patio. They were placed on concrete, level with rest of yard. I'm sure they can be placed on soil. I did coat each with wood seal before putting them down.
It was basically a choice between this system and a very similar system available on eBay. The eBay system boasted a 10 watt solar panel, but the motor only sported a total water lift height of 1.5 meters. This system boasts a water lift height of 2 meters. This was critically important, not because I need to lift water that height, but it indicates the power of the pump mechanism. My requirements were to lift water slightly over 1/2 meter, but this pump does a fantastic job on my water fountain. The water fountain I got from the local Lowe's came with an AC electric water pump. I ran it for a week with an extension cord on my patio, until this solar system arrived. The final destination for the water fountain was in the very rear of the back yard against the fence that separates our back yard from our neighbor's side yard. I was loathe to run electrical wire underground from the house to the location of the water fountain, hence the solar setup. I mounted the solar panel on top of the fence, hooked everything up and it was working within 1/2 an hour. This 12v pump at 55gph is just as powerful as the AC pump that came with the fountain. The battery seems to hold a charge that will allow the pump to run for a couple of hours before it runs out of juice. If you just let it charge for a couple of day, it'll run for many hours. Maybe at some point down the road, I might replace the battery with a larger wet-cell battery designed for a small ride-on tractor or a motorcycle so that the battery can supply juice longer to the motor. Otherwise, it works great.