Duemet Solar

Business snapshot

How this listing compares in Johannesburg

Measured against the other 14 businesses we hold data for in Johannesburg. Directory listings all look alike until you put them next to their neighbours.

Brand range

9 brands listed

Local median is 2. A wider range usually means more flexibility on price, and less depth on any single brand.

Services listed

0 of the services we track

Local median is 0.

Certification

Published

60% of Johannesburg listings publish at least one.

What this business's certifications actually buy you

This listing states: PV Green Card, COC issuer, SAPVIA, SAAEA, AREP.. Here is what each of those means in practice, and what it does not cover.

Certifications are self-declared on unclaimed listings and are not independently audited by SolarZA. Ask for the certificate number and check it with the issuing body before you sign anything.

What to ask Duemet Solar before you sign

These questions are generated from what this specific listing does and does not tell us. They are not accusations - a gap in a directory record usually means nobody has filled it in yet - but they are the gaps you should close yourself.

• 1Warranty terms are not stated. Ask for three separately: the panel performance warranty, the inverter warranty, and the workmanship warranty on the installation itself. The third is the one that fails first and the one most installers do not put in writing.
• 2There is little or no public review history on file. Ask for two reference installations completed in the last year within 30 km of you, and phone them. A small review count is not a red flag on its own - plenty of good installers never chase reviews - but it does mean you have to do the verification yourself.
• 3This business advertises a wide service area. Confirm who physically attends a callout at your address and what the response time is, because a wide footprint is often subcontracted and the warranty conversation gets complicated when the installing team is not the contracted party.

What solar is worth at this location

Johannesburg averages 5.5 kWh/m²/day across the year, dropping to 4.4 in June. On those figures a 5 kW array with a 5 kWh battery - the most commonly quoted household system in South Africa - generates roughly 17.2 kWh on an average winter day, 25.0 kWh in summer, and about 7 829 kWh a year. Johannesburg has the best winter-to-summer balance of the big metros: June still delivers around 80 percent of the December figure, so a Johannesburg system carries a steadier share of the bill year-round than a Cape Town one of the same size. City Power requires registration of any embedded generation and an approved bi-directional meter, and has been actively auditing unregistered installations. Highveld summer hail is the underrated risk: confirm the panel carries a hail impact rating and that the household insurer has been told the array exists.

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