ABB has a solar VFD out for remote pumping applications. It should have been released to the US markets a few months ago. It's powered -via- solar thru the DC Bus and has all that advanced MPPT stuff to control the solar rig. It can also run from AC as well, so when your solar is down, switch to AC.

It's kinda neat, but I would probably stick with solar to AC, then to the drive, which is more complicated, but you loose a number of parameters and control features with the solar drive that I could not live without. Guess I'm too picky.

Just got kicked off on another project today and I'm using a 10hp ABB ACS310 VFD for one of the pressure blowers. About the simplest drive on the planet to set up. Just punch in your motor data and hit the start button. 527 bucks.