solar solutions for farms in remote regions is a viable option because they do not have direct access to grid-
It becomes more viable to use Photovoltaic solar energy solution because there is usually a very high cost to get grid-
So, when doing your sums, you will find that your return on investment for Photovoltaic solar energy solution is much shorter and there-
Most farms will access: water from a borehole, river or dam.
The best way to provide power to pump the water from the supply to your water tanks is with an independent solar powered pump system.
Then there is the main farmhouse itself
In the farmhouse, it is usually best to make use of wood, coal, or gas stoves for cooking and hotwater.
One can look at the option of a solar geyser which uses the heat from the sun to warm the water running through special heating Photovoltaic solar energy solution.
For all your other electrical requirements like lighting, TV, computers, fridges, microwaves and washing machines, you would then look at a Photovoltaic solar energy solution comprising of an array of solar panels with a suitable sized bank of solar batteries and solar regulators and a power inverter.
In order to work out a detailed system, you need to do a list of all your appliances and equipment you want to, or are currently using and include all the lights, microwave, TV, computers, fridges, etc. as well as a separate indication of pump requirements for your borehole.
Please visit our page on Solar calculations
Also see how to design a battery Bank for a Farm Solar application