This small solar power system will allow you to run your laptop, electric fence and other small loads in remote places. It comes with a 50-Watt PV panel, 150W pure sine-wave inverter, 6-amp solar regulator and 12-volt 55-amp hour battery all for $850. Upgrade to a large N200 12-volt 430-amp hour battery and 80 Watt panel for $1300. If you want to run large power tools then you can from the $1300 system, all you need to do is buy a suitable modified square wave inverter from Jaycar, Dick Smiths or on Trade me and use the small pure sine wave inverter for those delicate loads.