Tom Leonard

I think 'Go Solar' would be the best one to answer your question here. But to put it in a nutshell if you have a gravity fed water system then you can get by with a gravity or low pressure solar unit. In other words, if you have a tinaco or water tank on your roof and it is not a pressurized system then you can use a low pressure or gravity fed solar hot water unit. But if you have a pressurized water system then you need a solar unit that can handle the water pressure, and those are more expensive. I don't believe they are 4 times more expensive, more like twice as expensive. But either way in this sunny climate solar is the way to go.