12-20kW | Three-phase High Voltage Hybrid Inverter
The Solis S6-EH3P(12-20)K-H-AU is part of Solis’s Solarator Series, a range of three-phase hybrid inverters built for high-voltage batteries. It comes in three ratings, 12kW, 15kW and 20kW, and suits large homes and small businesses with big rooftop solar systems. It works on-grid and off-grid, runs alongside generators and existing solar, and can connect to smart heat pumps. But is it worth the investment?
Key features of the Solis S6-EH3P(12-20)K-H-AU Hybrid Inverter
- 4 MPPT design: Four independent MPPTs suit roofs with multiple orientations or partial shading, increasing total solar output.
- Solar oversizing: Supports PV input of up to 160% of the inverter’s rated DC power, so you can install more panels and capture more sunlight.
- High-current PV inputs: Up to 20A per MPPT makes it compatible with the latest high-power solar panels.
- 160% overload capacity: In off-grid mode it can deliver extra power for short periods, helping motors, water pumps and air conditioners start reliably.
- Seamless backup switching: It switches from grid to backup power in under 10ms, keeping appliances running during a blackout.
- DC and AC coupling: It can connect to solar panels directly or to an existing grid-tied solar system, making it easy to expand PV or add a battery to current solar.
- Generator integration: Multiple generator connection methods with automatic control.
- SG-Ready heat pump support: It can signal compatible heat pumps to run when surplus solar is available.
- Parallel operation: Up to six units can run in parallel to expand system capacity.
- Customisable backup reserve: Set how much battery charge is held back for outages.
- PV-only off-grid operation: It can run from solar alone without a battery, reducing upfront costs.
- AI-powered and VPP-ready: It supports smart energy optimisation and virtual power plant participation.
- 7-inch LCD screen: A large industrial-grade display makes local monitoring and settings easy.
- IP66 rated: Built for outdoor installation in harsh Australian conditions.
Specifications of the Solis S6-EH3P(12-20)K-H-AU Hybrid Inverter
- Model options: 12K, 15K and 20K
- Rated output power: 12kW to 20kW
- Recommended maximum PV array size: 24kW to 40kW (depending on model)
- Maximum input voltage: 1000V
- Start-up voltage: 160V
- MPPT voltage range: 200–850V
- MPPTs / input strings: 4 / 4
- Maximum input current: 20A per MPPT
- Battery type: Lithium-ion
- Battery voltage range: 120–800V
- Maximum charge/discharge current: 50A
- Backup output: Up to 20kW, 160% for 10 seconds
- Backup switchover time: Under 10ms
- Peak efficiency: 97.7% (EU efficiency 97.5%)
- Operating temperature: -25°C to +60°C
- Ingress protection: IP66
- Dimensions: 563 x 546 x 250 mm
- Weight: 35.2 kg
- Communication: Wi-Fi, LAN and Bluetooth as standard; CAN, RS485, DRM, DI/DO
- Certifications: AS 4777.2:2020, IEC/EN 62109-1/-2
Solis S6-EH3P(12-20)K-H-AU Hybrid Inverter warranty
Solis inverters typically come with a 5-year standard warranty, extendable to 10 years. Confirm the exact warranty terms with an authorised Solis distributor or retailer in Australia, as they may vary depending on the purchase agreement.
Applications for the Solis S6-EH3P(12-20)K-H-AU Hybrid Inverter
The Solis S6-EH3P(12-20)K-H-AU is well-suited for:
- Large three-phase homes: Ideal for households with high energy use and large rooftop solar systems.
- Small commercial sites: Suits shops, offices, workshops and farms on three-phase power that want to cut daytime electricity costs and keep running during outages.
- Regional properties: A strong option for areas that experience frequent grid outages.
Pros of the Solis S6-EH3P(12-20)K-H-AU Hybrid Inverter
- Highly efficient battery storage: 98.5% PV-to-battery charging and 97.2% discharge efficiency mean very little energy is lost storing and using solar power.
- Handles unbalanced and half-wave loads: It supports different loads on each phase and half-wave loads, giving more reliable power to a wide range of appliances.
- Low standby consumption: It draws less than 25W while idle, so less of your stored energy is used by the inverter itself.
- Advanced safety monitoring: Insulation resistance monitoring, residual current detection, surge protection and an integrated PV switch add extra protection.
- Wired and wireless connectivity: Wi-Fi, LAN and Bluetooth all come standard, so the system stays online even where Wi-Fi is patchy.
- Grid-friendly output: Low harmonic distortion (THDi < 3%) and an adjustable power factor help the system meet network requirements.
Cons of the Solis S6-EH3P(12-20)K-H-AU Hybrid Inverter
- High-voltage lithium batteries only: It doesn’t support low-voltage (48V) or lead-acid batteries.
- Lower surge capacity than low-voltage models: Its 160% overload is below the 200% offered by Solis’s low-voltage hybrids, which may matter for homes with large motor loads.
- Fan noise: Fan cooling runs at up to 65 dB(A), so it’s best installed away from bedrooms and living areas.
- Heavy: At 35.2 kg, it needs a solid mounting wall and may take two people to install.
- Three-phase only: Not suitable for homes on single-phase power.
Is the Solis S6-EH3P(12-20)K-H-AU Hybrid Inverter right for you?
The Solis S6-EH3P(12-20)K-H-AU is an excellent choice for:
- Three-phase households with big energy bills: If your home uses a lot of power and has plenty of roof space, this range can cover most of your needs.
- Buyers choosing a high-voltage battery: It’s a natural fit if you want the efficiency benefits of a high-voltage battery system.
- Small businesses: A practical option for businesses that want solar, storage and backup in one system.
However, if your energy needs are more modest, the smaller Solis S6-EH3P(5-10)K-H-AU may be more cost-effective. If you prefer a low-voltage battery, consider the Solis S6-EH3P(8-15)K02-NV-YD-L-AU.
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