Any pre-made commercial kits for pumping rainwater up out of tank?

I have a 1600 rain tank and am wondering if there are recommended solar panel/electric pump kits available that would let me take the water out, raise it an average of 6 inches, and then feed a drip line. I suspect the panels and pump need to be matched in size/capacity so am hoping there is somewhere I can just buy the right combination. My outlet form the tank is 2" if that matters.

What is the schedule and amount of water required to be pumped? What is the availibility of sun? Is the watering critical or is it used when available?

The total gallons per day and how often is a good starting point. That will point to your pump and electrical sizing.

The fact that you are using drip irrigation as opposed to sprayers and are not requiring a high head pump, lower cost and size for any given gallons per day or week. Efficiency (water conservation attributes of drip irrigation) and a long duration distribution of low pressure water is generally a good scenario, but scale and distance will also affect cost.

Once you have the requirement as a known or approximate figure, you can call a company that specializes in solar pumps for sizing of the pump and the power or shop for the resulting spec.

A Smith wrote:take the water out, raise it an average of 6 inches, and then feed a drip line.  

If you raised the tank 6 inches would the need for a pump be eliminated?

Yes, but raising the tank would be alot of work compared to installing a pump.

There are lots of solar powered bilge pumps available. Many sizes, GPH, price ranges... Would one like this one offered on Amazon suit your situation?