Choosing equipment
There is no single "most reliable" brand — it depends on what you need.
Victron and Fronius have the best long-term reputation and near-zero complaint volume on SA forums — but they cost 40–60% more than mid-tier brands.
SunSynk and Deye are the most popular hybrid inverters in SA. They work well for most homes. However: PowerForum owners have documented warranty repair waits of 58+ days, R6 900 labour charges, and warranty voiding if repaired by a non-authorised technician.
Growatt and Axpert work fine for basic backup but have noticeably slower grid-to-battery switchover and limited parallel capability. Fine for load shedding — not ideal if you want full hybrid blending.
Bottom line: SunSynk or Deye is the sweet spot for most SA homes. Budget R14 000 – R24 000 for the inverter alone.
17 June 2026 — Deye Cloud went down globally for ~3 hours. Users across SA, Australia, the UK, and Asia lost remote monitoring and control. SunSynk (separate platform) was not affected. This was the first major outage, but it exposed two real risks every Deye owner should know:
1. Cloud dependency — you lose visibility when Deye's servers are down. If you rely on the Deye Cloud app to check your system, a cloud outage means you're blind. The fix: set up local monitoring via SolarAssistant or Home Assistant on a Raspberry Pi — these talk directly to your inverter and work even when the internet is off.
2. Deye uses public WhatsApp groups for installer support — your inverter's serial number may be visible to strangers. MyBroadband has documented that Deye SA uses large WhatsApp groups where installers post customers' data logger serial numbers. In theory, a malicious party could steal a photo from the group, unbind the logger from your account, and gain full remote control of your inverter settings. Ask your installer to communicate via private WhatsApp Business or email — not a public group where your hardware details are visible to everyone.
Bottom line: Deye inverters are solid hardware. The cloud and support channels are the weak points. Plan for local monitoring from day one, and keep your data logger serial number private.
They share a common hardware platform (both manufactured by Deye) but differ in software and support:
SunSynk has stronger local SA support with a dedicated service centre, but repair wait times can be long. Their firmware is tuned for SA conditions.
Deye is generally R1 000 – R3 000 cheaper for equivalent models. Support is through importers and distributors rather than a single brand representative.
Both are NRS 097-2-1 approved. Both work with all major LiFePO₄ battery brands. The choice mostly comes down to installer preference and after-sales support in your area.
For a deep dive covering real failure modes, warranty claims, Deye Cloud risk, cable pinout gotchas, and SA summer heat performance — read our full SunSynk vs Deye owner intelligence guide.
It depends on your bill, not your roof. A rough guide for Gauteng (4.9 peak sun hours):
R600–R1 800/month bill: 4–6 × 550W panels (3.6 kW inverter)
R1 800–R4 000/month: 8–10 × 550W panels (5 kW inverter)
R4 000–R7 500/month: 12–14 × 550W panels (8 kW inverter)
Use our solar sizing calculator for a personalised estimate.
Batteries and load shedding
For basic essentials during Stage 4–6 (lights, WiFi, TV, laptop, fridge): a 5.1 kWh battery is the minimum that makes sense. This gives you roughly 4–6 hours depending on what's running.
For comfort during extended outages (add microwave, kettle, security cameras): 10.2 kWh (two 5.1 kWh units in parallel).
One battery is not enough for geysers, stoves, or pool pumps. Those need either a much larger system or a gas alternative.
The most common SA setup we see is a 5 kW inverter + 5.1 kWh battery — it handles Stage 6 comfortably for a typical household's evening routine.
Yes — read the fine print. This is one of the most contentious topics on SA solar forums.
Hubble AM-2: Multiple PowerForum users (April–May 2026) have reported battery housing bulging on older v1.5 BMS units. Hubble's BMS requests 53.8V from the inverter, but support sometimes denies warranty claims at anything above 53.6V. Ask your installer to confirm the exact charge voltage they programmed.
Pylontech: Similar warranty disputes with swollen batteries. The BMS allows cell voltages up to 3.9V, which some argue is too high for LiFePO₄ longevity.
Protection: Get the installer to put the battery charge voltage settings in writing on the quote. If the battery fails and those settings match the manufacturer's spec, you have a paper trail.
This is a common SoC (State of Charge) calibration issue. The inverter relies on voltage to estimate charge, and voltage drops under load can trigger a premature "empty" reading. Solutions:
1. Do a full discharge/recharge cycle to recalibrate the BMS. Most installers recommend doing this every 3 months.
2. Check the battery communication cable — if your inverter and battery aren't talking via CAN/RS485, the inverter is guessing.
3. Set the shutdown voltage correctly — 48V is typical for a 15-cell LiFePO₄ battery. Setting it too high wastes capacity.
Panel orientation & installation
North — always north. South Africa sits between 22°S and 35°S latitude, which means the sun always arcs across the northern half of the sky. Every solar panel must face north to capture maximum energy.
This confuses many first-time buyers who have read Northern Hemisphere guides where panels face south. In South Africa, the situation is reversed.
The optimal compass bearing (azimuth) is between 345° and 15° — essentially due north. Panels facing northeast or northwest lose 5–12% annual output. East or west facing panels lose 15–25%.
For a complete guide including province-by-province tilt angles and flat roof solutions, read our panel angle and orientation guide.
The optimal tilt angle equals your latitude. Johannesburg (26°S) → 26° tilt. Cape Town (34°S) → 34°. Durban (30°S) → 30°.
This angle maximises annual energy capture by pointing panels at the sun's average position across the year. An acceptable range is latitude ±5° — so Joburg panels between 20° and 30° will perform well.
Flat roofs without tilt frames lose 15–25% output. Tilt frames cost R1 500–R3 000 per panel but pay for themselves within 2 years through increased production. See our complete angle guide for province-by-province data.
It depends on your municipality:
- City Power (Johannesburg): 5–10 working days, online portal
- City of Cape Town: 10–20 working days, includes export tariff option
- Tshwane: 10–15 working days
- Ekurhuleni: 15–25 working days
- eThekwini (Durban): 20–30 working days
- Nelson Mandela Bay: 15–20 working days
Your installer should file the SSEG paperwork on your behalf. If they say it "isn't necessary" — that is incorrect. All grid-tied solar systems require SSEG registration. Operating without it risks fines, invalidates your home insurance for solar-related claims, and can complicate selling your property.
Yes — but you need tilt frames. Without them, panels lie flat and lose 15–25% output, collect dust faster (reducing output another 5–10%), and water pools on the surface, shortening panel lifespan.
Two tilt frame types: ballasted (weighted, no roof penetrations) and mechanically fixed (bolted through the slab). Cost: R1 500–R3 000 per panel. The minimum recommended angle is 15°, ideally 20°+.
Flat roofs also require careful row spacing to prevent self-shading — front rows casting shadows on rear rows, especially in winter. Read our roof type compatibility guide for full details.
Your system keeps working — and keeps saving you money. Solar panels generate electricity regardless of whether load shedding exists. The value shifts from backup to bill reduction:
- Grid-tied systems (with battery): Continue to reduce your electricity bill by 50–80%. The battery provides backup for any future outages (municipal faults, storms).
- Feed-in tariffs: Some municipalities (City of Cape Town, eventually others) pay you for excess electricity exported to the grid. This becomes more valuable without load shedding because your battery isn't constantly discharging.
- Long-term economics: With Eskom tariffs increasing 8–12% annually, the financial case for solar improves every year regardless of load shedding.
The honest answer: load shedding accelerated solar adoption in SA, but the ROI case was already strong before it started and will remain strong after it ends.
Installation and compliance
You should receive three documents minimum after installation:
1. Certificate of Compliance (CoC) — issued by a DoEL-registered installation electrician. Legally required under SANS 10142-1.
2. SSEG registration confirmation — proof that your system is registered with your municipality (City Power, Eskom, or City of Cape Town). Grid-tied systems under 100 kVA no longer need an ECSA engineer sign-off (2026 rules) — a DoEL electrician's CoC is sufficient.
3. NRS 097-2-1 certificate — proof your inverter model is type-tested and approved for grid connection. Your installer should provide a copy.
⚠ Red flag: Any installer who says "the CoC will come later" or "SSEG registration isn't necessary." It is necessary, and it's the law.
Equipment substitution (promising SunSynk but installing Growatt, or swapping 550W panels for 455W) is unfortunately common in SA. Protection:
1. Get model numbers on the quote, not just brand names. "Deye inverter" is too vague — insist on the exact model.
2. Photograph the equipment boxes before installation. Check model numbers match the quote.
3. Do not pay the full amount upfront. Standard practice is 50% deposit, 50% on completion after CoC is issued.
A standard 5 kW system (inverter + battery + 8 panels) takes 1–2 days for a professional crew of 2–3 people. Larger systems (8 kW+, hybrid with more panels) may take 2–3 days.
Add 1–2 weeks for SSEG registration processing, depending on your municipality. City Power Johannesburg typically processes within 5–10 working days.
Yes. PV GreenCard is the SA solar industry's quality assurance programme — backed by SAPVIA. An installer with PV GreenCard certification means:
- They've passed a theoretical and practical assessment
- They follow SANS 10142-1 wiring regulations
- They issue proper CoCs
- They're accountable to SAPVIA's code of conduct
It is not a guarantee of perfection — but it eliminates the bottom tier of installers who have no formal training at all. Every installer we match you with is PV GreenCard certified and SAPVIA registered.
Cost and savings
Yes — the higher tariffs go, the faster solar pays for itself.
The 2026 tariff increases (8.76% Eskom in April, 9.01% municipal in July) mean every kilowatt-hour you generate yourself is worth more than it was last year. At Johannesburg's City Power high-tier rate of R3.48/kWh (before the July increase), a typical 5 kW system saves R2 600 – R3 200 per month.
At 10% annual escalation, a R130 000 system pays back in under 5 years and saves over R400 000 across 10 years. See our full cost breakdown with the case study.
Yes. Several SA options exist:
- Bond registration: Many banks (FNB, Standard Bank, Nedbank) allow you to add solar to your home loan at bond interest rates — the cheapest option
- Solar loans: FNB offers dedicated solar finance; MFC (Nedbank) covers solar via vehicle finance
- Rent-to-own: Companies like Wetility and GoSolr offer subscription models where you pay monthly — you don't own the equipment, but there's no upfront cost
We don't offer finance ourselves, but we can connect you with installers who do.
Still have questions?
Get matched with installers who can answer them — based on your actual home, not a brochure.