The cheapest possible solar that lowers my Eskom bill
And you do not need backup during load shedding (e.g. your business runs daylight hours only), choose grid-tied solar.
Read about grid-tied
PV Solar Systems · South African Buyer's Guide
Grid-tied, hybrid or off-grid? The South African solar buyer's guide, before you choose a brand.
Every solar buyer in South Africa faces the same first question: which type of system do I actually need? This page is the honest, independent guide to grid-tied, hybrid and off-grid PV solar, plus battery backup and generators, so you can make the right decision before you start shopping for brands.
Where to start
Pick the right type of system first, the brand decision is easier after that.
South Africans shopping for solar in 2026 are usually told first to compare brands. That's the second question. The first, and far more important, question is which type of solar system you actually need. Get the type right and the brand decision is straightforward.
South Africans shopping for solar in 2026 are usually first told to compare brands, Tesla against SigenStor, Sunsynk against Deye, and so on. That is the second question. The first, and more important, question is: which type of solar system do I actually need?
The answer depends on three things: do you need backup during load shedding, what is your monthly Eskom consumption, and how important is full energy independence? The type of system you end up with, grid-tied, hybrid or off-grid, flows directly from those three answers. Get the type right and the brand decision is relatively easy. Get it wrong and no brand will fix the mismatch.
This page walks through every system type you might be quoted in South Africa. It also covers the alternatives most installers do not mention, pure battery backup without solar, and traditional generators, because for some buyers those are still the right answer.
Synergy Energy Solutions has installed over 1 700 systems since 2010 and is approved by Tesla, Sigenergy, Deye, Sunsynk and Victron. We install all three types of solar system and we will tell you honestly which one fits your home or business, even if the answer is "a smaller system than you thought".
Independent guidance, not a brand pitch
Every Synergy installation is engineered to SAPVIA, NRS 097-2-1 and SANS 10142 standards, with SSEG registration handled end-to-end. Because we're approved across four major brands, our recommendations come from your load profile and budget, not from which kit we have to clear.
SAPVIA Member
PV GreenCard Installer
ECA Registered
Tesla Approved
Sigenergy Partner
Sunsynk & Deye Approved
Victron Approved
NRS 097 Compliant
1,700+
Systems Commissioned
48 MW
Peak PV Commissioned
17+ MWh
Battery Storage Deployed
9 / 9
Provinces Serviced
System type 1 of 5
Grid-tied solar: the cheapest entry point, with no backup.
Solar straight to your loads, excess exported to Eskom, no batteries. The lowest-cost route to solar, but the inverter shuts off the moment Eskom does.
Best for: daytime-heavy homes & SMEs
What is a grid-tied solar system?
A grid-tied solar system is the simplest configuration available. Solar panels on the roof generate DC electricity, a string inverter converts it to 230 V AC, and that power flows directly into your home's electrical loads during daylight hours. Any solar generated above what you are using is exported back to the Eskom grid under a Small-Scale Embedded Generator (SSEG) registration.
The critical limitation: a grid-tied system has no battery storage. When Eskom power goes off, whether from load shedding or a fault, the grid-tied inverter shuts down automatically. This is a safety feature called anti-islanding, designed to protect Eskom technicians working on the line. It cannot be bypassed. If you are home during load shedding with a pure grid-tied system, you have no power.
For this reason, pure grid-tied installations have become rare in South Africa since 2022. They make sense only when load shedding protection is not a priority, typically for businesses that operate strictly during daylight hours, or for buyers who want the cheapest possible entry point and plan to add batteries later.
Pros
- Lowest upfront cost of any solar system type
- Fastest payback, typically 16 to 30 months
- No batteries means lower maintenance over time
- Excess solar exported under SSEG (where municipality allows)
- Simple to design and install
Cons
- Switches off completely during load shedding
- No protection against Eskom power failures
- Most savings only happen during daylight hours
- Adding batteries later usually means replacing the inverter
- Not suitable for homes that need evening or overnight backup
Synergy's honest take
In 2026 we rarely recommend a pure grid-tied system to a residential client. The price difference between grid-tied and an entry-level hybrid (around R77 900 from our Deye range) is so small that most buyers regret choosing grid-tied the first time load shedding returns. If budget is the constraint, we'd rather right-size a hybrid than over-promise on grid-tied.
System type 2 of 5
Hybrid solar: the South African default for 2026.
Solar by day, battery by night, grid as backstop. The configuration that has dominated South African installations since 2022, and the system Synergy recommends for roughly 85% of homes we visit.
Best for: most South African homes & businesses
What is a hybrid solar system?
A hybrid solar system is everything a grid-tied system does, plus a lithium battery and a hybrid inverter. The hybrid inverter is the brain of the system: it manages three power sources simultaneously, the solar panels, the battery, and the Eskom grid, and decides moment-by-moment which to use.
How it works in practice: during the day, solar powers your home and charges the battery. In the evening, the battery powers your home until it depletes. Only then does the system draw from Eskom. If load shedding hits, the inverter automatically isolates from the grid and continues running your home from solar and battery. You usually do not even notice the outage.
This is the configuration that has dominated South African solar installations since 2022. It combines the cost efficiency of grid-tied solar with the reliability of off-grid, without the cost penalty of either. Every one of the four major residential brands we install (Tesla, SigenStor, Sunsynk, Deye and Victron) is designed primarily as a hybrid platform.
Pros
- Rides through load shedding automatically
- 60 to 90 percent reduction in Eskom bill
- Powers your home day and night from solar + battery
- Scales easily, add panels or batteries later
- Available across every major brand we install
- Works on single-phase or three-phase supply
Cons
- Higher upfront cost than grid-tied or backup-only
- Battery replacement may be needed at year 10 to 15
- Slightly longer payback than pure grid-tied
- Requires SSEG registration with your municipality
- Not designed for full off-grid operation without resizing
Synergy's honest take
If you ask us to recommend a system for an average South African home in 2026, the answer is almost always a hybrid sized to your measured Eskom consumption. Around 85% of the residential installations we complete are hybrid configurations. The decision then becomes which brand, and that depends on your budget, expansion plans, and whether you want a polished app experience or maximum flexibility.
System type 3 of 5
Off-grid solar: full energy independence, at a cost.
No Eskom connection at all. Oversized panels, a much larger battery bank, often a backup generator. The right answer for remote farms and lodges, and almost always overkill for everyone else.
Best for: remote properties, farms & lodges
What is an off-grid solar system?
An off-grid solar system has no Eskom connection at all. The home or business is powered entirely by solar panels and a battery bank. There is no grid backstop, so the system must be sized to handle every kilowatt-hour the property consumes, including the worst-case scenario of several consecutive cloudy days.
How off-grid differs in design: the solar array is significantly oversized compared to a hybrid system, the battery bank is two to four times larger, and load profiling becomes critical. Every appliance is mapped against expected solar generation and battery autonomy. Many off-grid installations also include a backup generator that automatically starts during prolonged cloudy weather, not as a primary power source, but as an insurance policy against winter shortfalls.
Off-grid is not the same as "grid-independent during load shedding". A hybrid system already does that. True off-grid means the property has no Eskom connection at all. This is a real distinction with cost implications: an off-grid system typically costs two to three times more than the equivalent hybrid system for the same home.
Pros
- Zero reliance on Eskom or municipal supply
- No SSEG registration or grid compliance required
- Ideal for remote farms, lodges and rural properties
- Eliminates monthly grid charges entirely
- Predictable energy costs for decades
Cons
- Significantly higher upfront cost than hybrid
- Larger battery bank means more maintenance over time
- Often requires a backup generator for winter
- Longer payback period than hybrid or grid-tied
- Every appliance must be load-profiled at design stage
- Adding new high-power loads later is difficult
Synergy's honest take
Off-grid makes sense in two scenarios. First, when there is no reliable grid supply, remote farms, game lodges, properties beyond municipal infrastructure. In that case off-grid is not optional, it's the only option. Second, when a buyer is willing to pay a meaningful premium for full energy independence as a lifestyle choice. For everyone else, a well-designed hybrid system delivers 90% of the benefit at less than half the cost. We'll tell you honestly which category you fall into during the site assessment.
System type 4 of 5
Backup power systems: battery, inverter, or both.
Not every buyer wants solar. Some just want the lights to stay on. Backup power systems solve that specific problem, with or without solar panels attached.
Best for: load shedding only, no solar yet
What is a backup power system?
A backup power system keeps essential loads running when Eskom power is off. Unlike a hybrid solar system, a backup system does not necessarily generate any of its own electricity, it simply stores grid electricity in a battery for use during outages. There are three common configurations in South Africa.
1 Battery + inverter only (no solar)
The simplest backup setup. A lithium battery and inverter are installed and wired to your essential circuits, lights, plug points, Wi-Fi router, security system, fridge. The battery charges from the grid when Eskom is on, and the inverter automatically takes over when the grid drops. There are no panels on the roof. From approximately R45 000 installed for an essential-loads system.
This is the cheapest way to ride through load shedding. It does not reduce your Eskom bill, because it is still drawing all its power from the grid, it just shifts when you draw it. For tenants, retirement-village residents, or anyone who cannot install rooftop panels, this is often the only practical option.
2 Hybrid solar (solar + battery + grid)
This is the same hybrid system covered in section 2 above. We mention it here because it is a backup system, arguably the best one. The battery handles load shedding, and the solar panels also reduce your Eskom bill day-to-day. For most buyers spending money on backup, adding solar costs a relatively small amount more and delivers ongoing savings that pay back the difference within a few years. From approximately R77 900 installed.
3 Generator-based backup
A petrol or diesel generator with an automatic transfer switch (ATS) is the third way to keep power on during outages. It does not store electricity, it generates it on demand by burning fuel. We cover generators in detail in the next section, including the fuel-cost reality that makes them increasingly hard to justify long-term.
Practical guidance
If you only want load shedding protection and cannot install solar (e.g. you rent, or have a complex roof), choose a battery + inverter system. If you can install solar, almost always choose hybrid, the math favours it within 3 to 4 years. Generators are a fading third option for specific use cases like very high-power loads or remote sites.
Synergy's honest take
We install all three configurations, but in 2026 we are quoting roughly 85% hybrid solar, 10% battery-only backup, and 5% generator-based backup. The trend has shifted decisively toward solar-attached backup as battery prices have fallen and Eskom tariffs have continued to climb. We will recommend whichever option best fits your situation, not the one with the highest margin.
System type 5 of 5
Generators: familiar, but increasingly hard to justify.
Many South Africans still default to a generator when load shedding hits. We understand why, generators are familiar, available off the shelf, and feel like a quick fix. But the long-term math is no longer in their favour.
Best for: very high-power loads, occasional use
When does a generator still make sense?
A generator burns petrol or diesel to spin a motor that produces electricity on demand. It is mature technology, widely available, and capable of running large loads, air conditioning, pool pumps, electric ovens, workshop equipment, that smaller battery systems can struggle with.
For occasional use (a few hours per month, perhaps for a workshop or a remote site), a generator can be a sensible backup option. Many farms keep one as a third-tier insurance policy behind solar and battery. They are also still valuable for high-power industrial or commercial settings where the load profile does not suit batteries.
The fuel cost reality: the math has changed.
Where generators have stopped making sense is for typical residential load shedding. A 5 kVA generator running roughly four hours a day during load shedding burns approximately 4 to 6 litres of petrol per day at current pump prices. That works out to roughly R1 500 to R2 500 per month in fuel alone, before any servicing, oil changes or replacement parts.
Over five years, that is R90 000 to R150 000 in fuel costs, often more than the entire cost of an entry-level hybrid solar system that pays for itself by reducing your Eskom bill. With petrol prices continuing to rise, the gap widens every year.
The honest comparison
A R77 900 entry-level Deye hybrid solar system saves you money on Eskom every month while running silently and producing no emissions. A petrol generator costs you R1 500 to R2 500 every month while running noisily and producing emissions, and it does not generate any power when load shedding ends. Over a five-year horizon, the solar system is almost always the better financial decision, as well as the more comfortable one to live with.
Pros
- Lower upfront cost for small generators
- Handles very high power loads easily
- No reliance on sunlight or battery state-of-charge
- Mature, widely understood technology
- Useful as a tertiary backup on off-grid farms
Cons
- R1 500 to R2 500 per month fuel cost typical
- Loud, often a problem in dense suburbs
- Produces exhaust emissions (carbon monoxide risk)
- Regular servicing and oil changes required
- Cannot reduce your Eskom bill day-to-day
- Depreciates with no offsetting savings
- Fuel cost rises every year with petrol prices
Synergy's honest take
We still install generators, but only in two scenarios. First, as part of a hybrid setup where the generator is a backup to the battery for prolonged cloudy weather or very high-power events. Second, for commercial sites with specific high-load equipment that cannot be served by batteries economically. For typical residential load shedding, we'll almost always recommend a hybrid solar system instead, the upfront cost is similar once you factor in the generator wiring and ATS, and the running cost is dramatically lower. We see customers regularly replace 2-year-old generators with hybrid systems once they add up the fuel receipts.
All five options compared
System types side by side: cost, payback, backup, complexity.
Every dimension that matters when choosing between grid-tied, hybrid, off-grid, battery-only backup, and generators, in one comparison table. The hybrid column is highlighted because it's the right answer for most South African buyers in 2026.
| Dimension | Grid-tied | Hybrid | Off-grid | Battery backup | Generator |
|---|---|---|---|---|---|
| Starting cost (installed) | ~R75 000 | R77 900 | ~R220 000 | ~R45 000 | ~R15 000+ |
| Load shedding backup | No | Yes, automatic | Always (no grid) | Yes, automatic | Yes (manual or ATS) |
| Reduces Eskom bill | Yes, daytime only | Yes, 60 to 90% | No Eskom bill at all | No | No |
| Generates own power | Yes (solar) | Yes (solar) | Yes (solar) | No | Yes (burns fuel) |
| Monthly running cost | Negligible | Negligible | Zero (no grid) | Negligible | R1 500 to R2 500 fuel |
| Typical payback | 16 to 30 months | 24 to 48 months | 36 to 60 months | None, pure expense | None, ongoing cost |
| Noise & emissions | Silent, clean | Silent, clean | Silent, clean | Silent, clean | Loud, exhaust fumes |
| SSEG registration required | Yes | Yes | No | No | No |
| Scalability | Add panels, not batteries | Add panels & batteries | Add panels & batteries | Add batteries | Generally fixed size |
| Best for | Daytime-heavy SMEs | Most SA homes & businesses | Remote properties, farms | Renters, no-roof situations | High-power occasional use |
Quick decision guide
If you want X, choose Y: the 30-second answer.
Pick the statement below that best describes your situation. Each card points to the system type our engineers would typically recommend as a starting point.
To save on Eskom AND ride through load shedding
The South African default for residential and most commercial buyers in 2026, choose a hybrid solar system.
Read about hybridTotal energy independence from Eskom
You are on a remote property, farm or lodge with no reliable grid, choose a fully off-grid solar system.
Read about off-gridJust load shedding protection, no solar
You rent, have a complex roof, or simply cannot install panels, choose a battery + inverter backup system.
Read about backupBackup for a workshop or very high-power loads
Occasional use only, batteries impractical, or a tertiary backup behind solar, consider a generator (carefully).
Read about generatorsBook a free site assessment
Our engineers will review your last three Eskom bills, measure your roof and recommend the right system type for your home or business.
Book free assessment
Once you know your system type
Then it's time to choose a brand.
Synergy is approved for all four major residential battery platforms in South Africa. Whichever system type you have decided on, we install it under the brand that fits your budget, expansion plans and feature priorities.
Running a business, factory, farm or office park?
Commercial solar has a different buying process and a different pricing structure. Twelve three-phase packages from R235 720 (15 kW) to R3 743 956 (250 kW+) using SigenStor and Deye HV platforms, with Section 12B accelerated depreciation eligibility. Explore commercial packages →
Frequently asked questions
PV solar systems in South Africa: the questions buyers ask most.
Honest answers to the questions we hear most often at a first site assessment. Don't see your question answered? Call us on 010 601 6464.
What is the difference between grid-tied, hybrid and off-grid solar systems?
A grid-tied solar system feeds solar power directly into your home and exports excess to Eskom, but it switches off automatically during load shedding for safety. A hybrid solar system adds a lithium battery and hybrid inverter, so the home keeps running during outages and only draws from Eskom at night when the battery is depleted. An off-grid solar system has no Eskom connection at all and relies entirely on solar generation and a much larger battery bank, suited to remote properties, farms and lodges. In South Africa in 2026, hybrid is the dominant choice because it combines the cost efficiency of grid-tied with the reliability of off-grid.
Which solar system type is best for a typical South African home?
For most South African homes in 2026, a hybrid solar system is the right choice. It combines daytime solar generation, lithium battery backup for load shedding, and grid integration for cost-effective night-time use. A pure grid-tied system is cheaper but offers no backup during outages. A full off-grid system is significantly more expensive than hybrid and only makes sense if you have no reliable Eskom connection.
What is a backup power system and how is it different from solar?
A backup power system keeps essential loads running during a power outage. The simplest type is a battery and inverter without solar panels, which charges from the grid when power is available and runs your essentials when the grid is down. A solar hybrid system extends this concept by also generating power from the sun during the day, which means the battery can recharge from solar even during extended outages. A generator is a third option that burns diesel or petrol to produce electricity, but does not generate power from the sun.
Are generators still a good option for backup power in South Africa?
Generators are an option but rarely the best long-term choice in South Africa today. While the upfront cost of a small petrol or diesel generator can be lower than a solar and battery system, the ongoing fuel cost is significant and rising. A 5 kVA generator running for four hours a day during load shedding burns approximately R1 500 to R2 500 of fuel per month. Over five years that is R90 000 to R150 000 in fuel alone, which often exceeds the cost of a solar and battery system that pays for itself through Eskom savings.
How much does each type of solar system cost in South Africa?
In South Africa in 2026, indicative installed pricing typically ranges as follows. Grid-tied solar starts at approximately R75 000 for an entry-level home system without battery backup. Hybrid solar starts at approximately R77 900 for a small Deye system and ranges up to R387 500 for a large premium SigenStor or Tesla Powerwall installation. Off-grid solar starts at approximately R220 000 for a small remote-property system and can exceed R500 000 for fully self-sufficient homes or farms. Battery backup without solar starts at around R45 000 for an essential-loads system.
Do I need to register my solar system with Eskom or my municipality?
If your solar system stays connected to the grid, which includes all hybrid and grid-tied installations, you are legally required to register it as a Small-Scale Embedded Generator (SSEG). Synergy handles the full SSEG registration process end-to-end and supplies all the documentation you need, including the SANS 10142 Certificate of Compliance, single-line diagram and NRS 097-2-3 inverter compliance certificate. Off-grid systems do not require SSEG registration as they are not connected to the grid.
What is the payback period for a solar PV system in South Africa?
Most residential hybrid solar systems in South Africa now pay back within 24 to 48 months based on current Eskom tariffs and typical savings of 60 to 90 percent on monthly electricity bills. Grid-tied systems pay back faster, typically in 16 to 30 months, because they are cheaper and offset daytime consumption directly. Off-grid systems pay back in 36 to 60 months because the larger battery bank adds upfront cost. Commercial systems can pay back in 3 to 5 years thanks to Section 12B accelerated depreciation.
Can I start with a grid-tied system and add batteries later?
Yes, but it requires careful planning at the design stage. A pure grid-tied system uses a string inverter that does not handle batteries. To add battery backup later, the inverter must be replaced with a hybrid inverter, which adds cost compared to designing for hybrid from day one. A better approach for most South African buyers is to install a hybrid inverter from the start with a small entry-level battery, then add more battery capacity later when budget allows.
How long does a residential solar installation take?
Most residential installations complete in one to two working days on site. This includes panel mounting, inverter and battery installation, electrical commissioning, Certificate of Compliance paperwork and monitoring app setup. Larger three-phase installations and complex roof geometries can take three to five days. Off-grid installations on remote properties take longer due to logistics. Commercial systems range from one week for entry packages up to ten weeks for 250 kW+ industrial installations.
Does Synergy install commercial, industrial and agricultural solar systems?
Yes. We have a dedicated commercial, industrial and agricultural solar hub covering 12 three-phase packages from 15 kW to 250 kW+ using SigenStor and Deye HV platforms. Typical clients include factories, workshops, cold-storage facilities, packhouses, farms, office parks, retail centres and lodges. Commercial projects often qualify for Section 12B accelerated depreciation, which significantly improves after-tax payback.
Why Synergy
Why South African buyers choose Synergy regardless of system type.
Six reasons buyers pick Synergy whether they're shopping for grid-tied, hybrid, off-grid, battery backup or generator-paired systems.
01
Installing since 2010
Sixteen years of continuous trading. Every warranty we sign is backed by a company that has weathered every South African energy cycle since 2010.
02
All system types in-house
We design, install, certify and support grid-tied, hybrid, off-grid, battery backup and generator systems, one team, one accountable point of contact.
03
Four brand approvals
Tesla Certified, Sigenergy Approved, Deye/Sunsynk Authorised, Victron Authorised. One of very few SA installers approved for all four major platforms.
04
Honest sizing & advice
We size every system around your measured Eskom consumption, not a sales catalogue. If a smaller system is the right answer, that's what we quote.
05
SAPVIA, PV GreenCard, ECA
Full membership of the three bodies that matter for PV installers in South Africa. Every system documented, insurable and SSEG-registration ready.
06
1 700+ systems commissioned
48 MW of peak PV and 17+ MWh of battery storage deployed across South Africa. Real, measurable installation volume, not a startup track record.
Tesla Certified
Sigenergy Approved
Deye Authorised
Sunsynk Approved
Victron Authorised
SAPVIA Member
PV GreenCard
ECA Registered