Going green with solar energy to heat water is a wise, eco-friendly, and cost-effective decision. With a plethora of solar water heaters out there, here’s a quick guide to help you pinpoint the ideal system for your needs.
1. Passive Solar Water Heaters:
True to its name, this system operates passively, heating water without a pump. Using gravity, it’s a non-pressurized system typically installed on the roof. Ideal for small households, this is the most pocket-friendly option, with prices starting from R10,100 (approx. $700) to R20,100 (approx. $1400).
2. Pumped Solar Water Heaters:
A level up, this system uses a water pump powered by mains or a separate 12V solar panel. It’s more efficient and heats a larger volume of water, but remember, an extra battery is required during load shedding. Prices vary extensively depending on the system you opt for, but expect to spend between R15,100 (approx. $1,000) and R30,100 (approx. $2,100).
3. MPPT PV (PV Solar) Water Heaters:
In this system, the geyser element is swapped out for a dual voltage 12V/240V one. When the sun is out, the energy is converted into 12V DC, powering the element directly – no inverter needed. When there’s no sun, it switches to 240V mains. This system is slightly more expensive, at around R20,100 (approx. $1,400).
4. Grid-Tied Solar PV or Fully Off-Grid Solar PV:
Ready to go all-in? With these systems, there’s no need for changes to your geyser or plumbing. Solar panels and an inverter power not only your water heater but your entire house. It’s a notable investment, ranging from R70,100 (approx. $4,900) to R200,100 (approx. $14,000), but it lets you harness the full power of the sun.
Remember, the best solar hot water option for you depends on your needs, budget, and how much sunshine you get. So, weigh your options and let the sun start working for you!
