Yes, Franklin is very proud of their PV direct inverters, and the price isn't cheap in the US either. It made me feel good about my homebrew 5 step sine inverter development.
+1 MikeNash's comment on pumps. Any pump you buy should have a head vs flow rate performance chart so you know just what to expect. If a pump is sold as 3 meters of head, and 12 LPM flow rate, the former means zero flow at that 3 meters, and the latter means 12 LPM at zero head or lift. You will be very disappointed if you think that meant 12 LPM at 3 M. There should be no surprise if you understand the usual marketing approach used for pumps, and get the actual performance chart so you can find the flow rate at your intended head or pressure. If they don't have a flow- head performance chart, pass on the pump.
The problem with automatic watering systems is that the batteries must be in an outside ventilated enclosure or you could have a Brown's gas explosion risk on your hands. If you're in a cold winter climate, that doesn't work well with water filled tubing.
Any time you have high battery water use in lead acid batteries, you must be seriously overcharging. I have a hard time believing Mike's NIFE battery water use is also not caused by gross overcharging...either excessive current or voltage, but I must assume he has confirmed this as normal from other NIFE users. I'd be monitoring gas bubbling, current and voltage throughout the charge cycle to try and figure out what's going on. If I had no other way of doing it, putting some cloth on the PV to reduce charging current would be useful to see if there's a level below which they will charge without gassing so darn much. Clamp on DC amp meters are not that expensive now and most are adequate.