Kwikot 150L Flat Panel Solar Geyser

What Is the Kwikot 150L Flat Panel Solar Geyser?

The Kwikot 150L Flat Panel Solar Geyser is the most widely specified residential solar water heating system in South Africa. It uses a flat plate collector with a black-coated absorber, thermally insulated casing, and a toughened glass cover. Sunlight passes through the glass, heats the absorber, and transfers heat to circulating water via copper tubes — no electricity or pump required during solar collection.

System specifications: Tank capacity: 150 litres | Collector type: Flat plate panel | System type: Thermosiphon (gravity-fed) | Backup element: 2kW or 3kW | Recommended household size: 2 to 3 people.

Why the 150L Is the Most Popular Size

South African solar installers and plumbers default to 150L as the standard recommendation for two to three person households. The tank size is sufficient for 2–3 showers plus household hot water needs throughout the day, while remaining manageable in terms of roof weight and upfront cost. It is the size most commonly in stock across South African solar suppliers and has the largest installer network of any solar geyser format.

Flat Panel vs Evacuated Tube at 150L

At the 150L capacity, buyers choosing between flat panel and evacuated tube should consider their climate. If you are in the Western Cape, Northern Cape, or KwaZulu-Natal coast, flat panel is the standard choice — winters are milder and direct sunlight is consistent. If you are in Gauteng, the Highveld, or Eastern Cape interior, evacuated tube performs better during cold winter mornings. Both technologies are available at 150L from PowerVault ZA.

Electricity Savings

A 150L electric geyser at R3.50/kWh typically costs R600–R1,100 per month. Replacing it with a solar geyser saves R400–R800 per month. At R16,990 for the unit plus R3,500–R5,500 for installation, the system typically recovers its cost within 2 to 4 years.

Supply Only — Installation Not Included

R16,990 is for the unit only. Contact PowerVault ZA on +27 83 476 8779 or info@powervaultza.co.za for installer referrals. We are based at 14 Sol Street, Linbro Business Park, Sandton, Johannesburg.

Frequently Asked Questions

Q: What is the difference between this and the 150L evacuated tube model?
A: Both models are 150 litres. The flat panel model uses a flat plate collector that performs best with consistent, direct sunlight. The evacuated tube model uses vacuum-insulated glass tubes that retain heat on cold mornings and overcast days. For Gauteng and high-altitude regions with cold winters, evacuated tube typically yields more hot water annually.

Q: Is 150L enough for three people?
A: Yes, for most households of 2 to 3 people. If all three shower in the morning consecutively, solar collection during the day reheats the water for evening use. The backup element supplements as needed on low-solar days.

Q: Does it include a timer for the backup element?
A: The backup element is included but a timer or controller is not standard. PowerVault ZA stocks the Geyserwise MAX solar controller separately — this allows you to schedule the backup element around load shedding windows and monitor solar performance.

Q: What is the installation lead time?
A: Once the unit is purchased from PowerVault ZA, a qualified installer in Gauteng can typically complete installation within 1 to 5 business days. Contact us for referrals.