Solis S6 Hybrid Inverter Review: A Value Pick for Irish Homes?
If you have had a few solar quotes in Ireland, there is a good chance a Solis inverter was on at least one of them. The S6-EH1P-L-PLUS is Solis’s current single-phase, low-voltage hybrid range, and it has become a go-to option for homeowners who want a battery-ready system without paying premium prices.
We have fitted plenty of Solis kit over the years, so this is our practical review of the S6 hybrid: what it does well, where it falls short, and how to get the most from it on an Irish tariff.
Solis S6-EH1P-L-PLUS: key specs
These figures are taken from the Solis S6-EH1P(3-8)K-L-PLUS datasheet. Specs can vary slightly between regional versions, so check the sheet that comes with your quote.
| Specification | S6-EH1P 3.6K | S6-EH1P 5K | S6-EH1P 6K |
|---|---|---|---|
| Rated AC output | 3.6 kW | 5 kW | 6 kW |
| Max usable PV input | 5.76 kW | 8 kW | 9.6 kW |
| MPPT trackers | 2 (16 A each) | 2 (16 A each) | 2 (16 A each) |
| Max PV voltage | 500 V | 500 V | 500 V |
| Battery voltage | 40 to 60 V (low voltage) | 40 to 60 V | 40 to 60 V |
| Max battery charge/discharge current | 80 A | 112 A | 135 A |
| Backup output | 3.6 kW, 2x peak for 10 s | 5 kW, 2x peak for 10 s | 6 kW, 2x peak for 10 s |
| Switchover time | Under 4 ms | Under 4 ms | Under 4 ms |
| Max / Euro efficiency | 96.2% / 94.7% | 96.2% / 94.7% | 96.2% / 94.7% |
| Protection rating | IP66 | IP66 | IP66 |
| Weight | Approx. 22 kg | Approx. 22 kg | Approx. 22 kg |
Solis also makes 3 kW, 4.6 kW and 8 kW versions in the same family, and larger 10 kW models exist, but for most Irish single-phase homes the 3.6 kW to 6 kW sizes are the sweet spot.
We supply and fit batteries and inverters across Ireland, with the €600 SEAI battery grant (5kWh or more) handled for you.Battery storage & the €600 grant
Features that matter in Ireland
Low-voltage batteries keep costs down
The S6 works with 48 V class lithium batteries rather than high-voltage stacks. These batteries are widely available and usually cheaper per kWh, which is a big part of why Solis systems often quote well. The catch is that compatibility is market-specific, so your installer should confirm the exact battery is on Solis’s approved list for Ireland rather than just matching the voltage.
Night-rate charging and smart tariffs
Through the SolisCloud app or portal, you can set timed charge and discharge windows. That means charging the battery on a cheap night or boost rate and using it during the evening peak, which is where most Irish battery savings come from. The interface is functional rather than flashy, and we often set the schedules up for customers at handover.
Fast, built-in backup
A real strength of the S6 is its backup capability. The datasheet quotes a switchover of under 4 ms and backup output equal to the inverter’s rating, with 2x peak for ten seconds to handle motor start-ups. It has dual backup ports so important and non-important loads can be managed separately. Your installer will still need to wire a dedicated backup circuit, so decide early which loads you want kept on in a power cut.
NC6 and the Clean Export Guarantee
The 3.6 kW, 5 kW and 6 kW models fit well within ESB Networks’ NC6 limit of 6 kVA on a single-phase supply. If you go for the 8 kW model, export limiting and possibly the NC7 process come into play. Either way, the inverter must be set to Irish grid settings and your installer submits the notification with the type-test certificate. With a smart meter in place, any surplus earns payments under the Clean Export Guarantee.
Pros
- Competitive pricing, especially when paired with a 48 V battery
- Very fast backup switchover with strong surge capacity
- Generous PV oversizing, around 160% of AC output
- Two MPPTs suit east/west or split roofs
- IP66 rated, so it can be mounted outdoors if needed
- Widely known by Irish installers, which helps with servicing and parts
Cons
- Lower conversion efficiency than premium high-voltage hybrids (96.2% max, 94.7% Euro)
- Low-voltage batteries mean higher currents and heavier DC cabling
- Battery compatibility must be checked carefully for the Irish market
- The app works but is less polished than some competitors
- Warranty terms depend on registration and region, so confirm the length in writing on your quote
Who the S6 hybrid suits
- Budget-conscious homeowners who want a battery-ready system now
- Homes focused on night-rate shifting with a modest 5 to 10 kWh battery
- Rural households that value quick, reliable backup during storms
- People who like the option of choosing from several compatible battery brands
If you plan to add a lot of battery capacity, want integrated EV charging, or care about squeezing out every last percent of efficiency, a high-voltage system may be worth the extra.
How it compares with the alternatives
Compared with stacked high-voltage systems such as the Sigenergy SigenStor, the Solis S6 is usually cheaper and more flexible on battery choice, but less efficient and less integrated. Compared with premium inverters such as Fronius GEN24 Plus or SolarEdge Home Hub, it gives up some efficiency and software polish in exchange for a lower price and stronger built-in backup on paper. Growatt and Sungrow sit close by on price, so it often comes down to battery availability and your installer’s experience with each brand.
Not sure which way to go? Our free energy audit looks at your usage and tariff to see what size of inverter and battery actually pays back.
Frequently asked questions
Which Solis S6 size should I choose for a typical Irish home?
For most homes with a 4 to 6 kWp array, the 5 kW or 6 kW model is a good fit. Both stay within the NC6 single-phase limit and allow some panel oversizing.
Can I add a battery later?
Yes. The S6 is a hybrid, so it can run solar only at first and take a compatible 48 V battery later. Choose your battery brand early if you can, so the right communications cabling goes in on day one.
Does the SEAI grant apply?
Yes. The SEAI solar PV grant of up to €1,800 covers the panels, and SEAI now offers a separate €600 grant for a home battery. Both need an SEAI-registered installer and a grant offer before work starts. Our SEAI grants guide explains the current rules.
Will it keep my lights on in a power cut?
Yes, provided a battery is fitted and the backup circuit is wired in. Only the loads connected to the backup output will stay powered, so plan those circuits with your installer.
Talk to us about a Solis hybrid system
Irish Wind & Solar is an SEAI-registered installer based in Waterford, working across all 26 counties. If you would like a straight answer on whether a Solis S6 suits your home, see our residential solar PV options or contact Jeff and the team for a no-obligation quote.
Thinking about your own system? See our home solar and battery systems or book a free survey with our SEAI-registered team.
Related: want to add storage? See our guide to Solis batteries in Ireland, including IntelliHome and the new FlexAIO all-in-one.
Related: using a Solis S6 for load shifting with a home battery.
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