We've been having some
trouble with our
creek pump and the first
place we decided to upgrade was the quality of the wiring.
You can get a 250 foot roll
of outdoor grade 12 gauge 2 wire for around 138 dollars. Our stretch is
just over 300 feet, which required the above 4 dollar junction box.
The plan will be to silicone
up the ends and mount it on a tree above the point where the flood
waters usually get.
The name solar pump is somewhat of a misnomer, since it is generally a electrical pump powered by a PV panel.
As for their power, I see no reason why it couldn't be as powerful as a grid-powered electric pump. Provided you have enough PV panels installed to provide the power.
Using solar panels with a MPP tracker and an inverter you should even be able to power your current pump with "solar power". But I'm pretty sure that the required PV panels and the regulator/invertor would cost significantly more than the pump!