Ask three South African installers which inverter to put on your wall and at least one will say Sunsynk without hesitation. Ask about Solis and you'll often get a more nuanced answer: a solid, well-priced unit that quietly runs a great many homes and businesses around the world. Both brands turn up in Alumo's line-up, both are hybrids that manage solar, battery and grid, and both will keep your lights on through load-shedding. So the honest question isn't which is "best" in the abstract, but which is the better fit for your home, your budget and the way you want to own a system for the next decade.
This guide compares Sunsynk and Solis the way it actually matters in South Africa: on local support, features, monitoring and value, rather than trading spec-sheet trivia. By the end you'll know which brand suits your situation and, just as usefully, why the difference is smaller than the forums make it sound.
Key takeaways
Both Sunsynk and Solis are capable hybrid inverters that handle solar, battery and grid switching for South African homes.
Sunsynk has the deepest local support network and installer familiarity, which smooths ownership and warranty claims.
Solis is a globally established brand that often lands at a keen price point, making it strong value in entry and rent-to-own packages.
For most homeowners the deciding factor is the installed, warranted system around the inverter, not the badge on the front.
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Two brands, two reputations
Sunsynk has become something close to a default in South African homes. It built its name here on strong distribution, installer training and local warranty backing, so parts are easy to get and almost every installer knows its firmware intimately. That familiarity is worth more than it sounds, because an inverter is a ten-year relationship, not a once-off purchase.
Solis, made by Ginlong, is one of the longest-established inverter manufacturers in the world and ships in serious volume globally. In South Africa it has a smaller but real footprint, and it tends to compete hard on price. That's exactly why it appears in value-focused offerings like Alumo's seven-year rent-to-own package, where a keen monthly figure matters more than brand prestige. You can see how both sit alongside AlphaESS, Huawei and Sigenergy on our brands overview.
Where they genuinely differ
Strip away the marketing and the meaningful differences come down to three things: the depth of local support, the monitoring app you'll live with day to day, and price. On raw capability (surge handling, battery management, grid-tie behaviour) a well-specified Sunsynk and a well-specified Solis of the same size will both do the job for a typical home. The gap is in the ecosystem, not the electronics.
Local support: Sunsynk's strongest card
Here's the part that decides most sensible purchases. When your inverter needs a firmware update, a settings tweak or a warranty repair, what you care about is how quickly a local technician can help. Sunsynk's investment in South African distribution means readily available stock, installers who have configured hundreds of the units, and a well-trodden warranty path. When something goes wrong at 8pm on a Tuesday, a short support chain is the difference between a minor annoyance and a week in the dark.
Solis support in South Africa is genuine but thinner on the ground, simply because fewer units are installed here. For a professionally installed, warranted system that gap matters less than you'd think, because the installer, not you, owns the relationship with the manufacturer. If Alumo puts a Solis inverter on your wall, they stand behind it, which neutralises most of the concern.
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Both brands give you an app to watch production, battery level and load-shedding behaviour from your phone. Sunsynk's monitoring is polished and widely used, and because so many local installers work with it daily, help is a message away. Solis's monitoring is perfectly functional and, for most people, does everything they need: you check that the battery is charging, that solar is flowing, and get on with your day. Neither app is a reason to rule a brand in or out.
Value and price: Solis's strongest card
If Sunsynk wins on support, Solis often wins on price. Because it competes globally on cost, it lets an installer hit a lower monthly figure without cutting corners on the actual electricity you get. That's why value packages lean on it. Alumo's BrightStart seven-year rent-to-own, for example, pairs a Solis 5kW inverter with an Eenovance 5.3kWh battery and three panels from around R1,339/month, a genuinely accessible route into solar with battery backup, spread over a longer term to keep the monthly low.
For buyers who want the most established local support and a slightly shorter finance term, Alumo's Sunsynk-based packages are the counterpoint. The Silver "The Eishkom Ex," their most popular option, runs a Sunsynk 3.6kW inverter with a 3.8kWh battery and four panels from around R2,035/month. The choice between the two is less "which brand is better" and more "which monthly figure and term suit me," which is a far more useful way to decide.
Start from your home, not the badge. Work out how much you want to run during load-shedding and how much roof you have, then let the sizing drive the inverter choice. Our guide to the wider equipment picture walks through how inverter, battery and panels fit together. If your priority is the deepest local support and installer familiarity, Sunsynk is the safe, popular pick. If your priority is the lowest sensible monthly payment and you're happy with a globally proven brand backed by your installer's warranty, Solis is excellent value.
Either way, the smartest move is to have your home assessed and get a written quote for both a Sunsynk and a Solis-based option, so you're comparing real numbers, not reputations. Get a free Alumo quote → and you can weigh the two side by side for your specific roof and usage.
The reassuring truth is that you're not choosing between a good inverter and a bad one. You're choosing between two capable hybrids, and the "wrong" answer here isn't a brand. It's an undersized system or a poor installation. Get those right and either badge will serve you well.
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Silver
The Eishkom Ex
The popular middle ground for most family homes that want solid daily solar and backup.
Sunsynk Powerlynk X — 3.6kW
Sunsynk 3.8kWh · ~3–4 hours backup
4 panels · 615W panels
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R2,035/mo
Est. monthly saving
~R1 200
That's about R835/month on top of what you save, for a system that becomes yours and shields you from rising tariffs.
Estimate only. A free site assessment sizes your system properly against your actual usage, roof and budget.
Frequently asked questions
Is Sunsynk better than Solis?
For most South African homes the practical edge goes to Sunsynk on local support and installer familiarity, which makes ownership and warranty claims smoother. But Solis is a globally established, capable inverter that often costs less, so "better" depends on whether you value the deepest support network or the keenest monthly price. Both will run a home through load-shedding.
Why is Solis often cheaper?
Solis competes hard on price globally and ships in large volumes, so it frequently lets an installer hit a lower monthly figure without compromising the actual performance you get. That's why it appears in value and longer-term rent-to-own packages where keeping the payment low is the priority.
Does the smaller Solis footprint in South Africa matter?
Less than you'd expect for a professionally installed system, because your installer, not you, owns the manufacturer relationship and stands behind the warranty. If Alumo installs a Solis inverter, they support and warrant it, which addresses the main concern about a thinner local presence.
Can I upgrade or add batteries later with either brand?
Both are hybrid inverters designed to work with battery storage, and capacity can often be expanded within the limits of the specific model. Exactly how much you can add depends on the inverter's rating and the battery it's matched to, so it's best confirmed during your site assessment rather than assumed.
Who supplies and warrants the inverter?
SolarGuide is an independent referral partner. Alumo supplies, installs, finances and warrants the systems, and all pricing here is indicative and subject to a site assessment and credit approval. We simply help you compare and get a free quote. Get a free Alumo quote →
SolarGuide is an independent referral partner. We help you compare options and arrange a free quote — Alumo supplies, installs, finances and warrants the systems. Pricing is indicative, sourced from Alumo’s published catalogue, and subject to a site assessment and credit approval.
