What Size Solar Geyser Do I Need?
Short answer: allow about 50 litres of hot water per person per day. That works out to a 100L solar geyser for 1–2 people, 150L for 3 people and 200L for 4–5 people.
Solar geyser size by household
| People | Hot water a day | Geyser size |
|---|---|---|
| 1–2 | about 100L | 100L |
| 3 | about 150L | 150L |
| 4–5 | about 200–250L | 200L |
| 6 or more | 300L+ | Ask us; two geysers or a larger system |
When to go one size up
- Long showers, a bath every day or teenagers in the house.
- Everyone showers in the evening or early morning.
- You live in a cold area or want hot water to last through cloudy days.
Low pressure or a retrofit kit?
- Low-pressure solar geysers are gravity-fed, simple and affordable. They suit farms, holiday homes and houses with low-pressure plumbing. See our low-pressure solar geysers.
- Retrofit manifold kits turn your existing high-pressure electric geyser into a solar geyser without replacing the tank. Size the kit by your geyser: more tubes for bigger geysers. See our retrofit kits.
Do I still need an element?
Yes, a small backup element covers long cloudy spells. On sunny days the sun does the work, so the element hardly runs. A smart controller such as the SR609C only switches the element on when the water is too cold.
Compare running costs in Solar geyser vs heat pump vs electric geyser.
The Sun Pays has supplied solar power, AC and DC water pumps and solar water heating across South Africa since 2007, with our own South African technical team for advice, repairs and support. Questions? WhatsApp 082 515 1655, call 012 734 0915 or email sales@thesunpays.co.za.
- Tags: Buying guide Geysers
- The Sun Pays
