Deye SUN-20K-SG05LP3-EU-SM2 20 kW hybrid inverter + 2 × SE-G5.1PRO-B 10.24 kWh

The Deye SUN-20K-SG05LP3-EU-SM2 with 2 × SE-G5.1PRO-B is a 20 kW three-phase hybrid inverter with two battery modules, made for a solar PV system of up to 32,000 W PV input. It differs from the 15 kW set only in the inverter: the batteries, dimensions and weight (50.6 kg) are the same, but PV input is higher (32,000 W against 24,000 W), maximum battery current is 350 A (not 280 A), and off the grid it can deliver 40 kW for 10 s (not 30 kW). Choose it when you plan more than 24,000 W of PV or a higher peak load; if 24,000 W is enough, the 15 kW set will do.

Technical specifications

How the Deye SUN-20K-SG05LP3-EU-SM2 set differs from the 15 kW set

Choose this 20 kW set if you plan up to 32,000 W of PV or need 40 kW of off-grid peak power. If 24,000 W is enough, the 15 kW set will do. Both sets have the same batteries, so the inverter is what decides.

Who is a 20 kW three-phase hybrid inverter with a battery for?

This bundle suits anyone who wants to keep surplus solar power for the evening instead of sending it to the grid. The manufacturer’s datasheet lists several uses:

• On-grid and off-grid systems
• Storing energy from a diesel generator
• AC coupling with an existing solar PV system
• Several inverters in parallel, up to 160 units

What is in the Deye inverter and battery bundle, and how do the parts fit together?

The bundle contains one Deye SUN-20K-SG05LP3-EU-SM2 and two SE-G5.1PRO-B modules. The inverter accepts 40–60 V low-voltage batteries, so this is a low-voltage (48 V) system. High-voltage and low-voltage systems are not compatible with each other.

How much energy does the bundle store and how do I choose battery capacity?

The bundle includes two SE-G5.1PRO-B battery modules.

We work out how many modules suit your inverter and site from your real consumption.

Can it run off-grid, with a generator and in parallel?

Off-grid, the inverter can briefly deliver up to 2 × rated power for 10 s, that is 40 kW. Unbalanced three-phase load is allowed at 100 % on each phase.

If the site has a diesel generator, the inverter supports storing energy from it. An existing solar PV system can be coupled on the AC side.

Home battery storage for a solar PV system: what does ESO say?

Surplus solar power can be kept for the evening instead of being sent to the grid. ESO (Lithuanian grid operator) states:

“Part of the surplus electricity generated can be stored in an energy storage device and used in the evening.”

ESO — Energy storage devices

The same page says a storage unit reduces the power fed into the distribution network, so in some cases a larger plant can be connected than grid limits alone would allow.

We handle it for you. We select the equipment for your site, deliver anywhere in Lithuania, install and connect it.

What to know before buying

• Location: the inverter weighs 50.6 kg and is rated IP 65, so we choose installation places for the inverter and the battery modules separately.
• Noise: up to 55 dB(A).
• Temperature: the inverter works from −40 to +60 °C with power derating above 45 °C.
• Battery port: the inverter has one battery port.
• Monitoring: RS485, RS232 and CAN interfaces, with GPRS, WiFi, Bluetooth, 4G or LAN optional.

Frequently asked questions

What is included in the Deye SUN-20K-SG05LP3-EU-SM2 and 2 × SE-G5.1PRO-B bundle?

One 20 kW three-phase Deye SUN-20K-SG05LP3-EU-SM2 hybrid inverter and two Deye SE-G5.1PRO-B battery modules.

How many battery modules come with the Deye 20K inverter?

The bundle has two SE-G5.1PRO-B modules.

Is the Deye SUN-20K-SG05LP3-EU-SM2 a three-phase hybrid inverter?

Yes. It connects to a three-phase grid (3L+N+PE, 230/400 V, 50 / 60 Hz) and has 2 MPPTs.

How much solar power can I connect to the Deye 20K inverter?

Max. PV input power is 32,000 W, up to 800 V, with an MPPT voltage range of 160–650 V. Hybrid Energy arranges the panel strings for your roof.

Does the bundle work without the grid?

Yes, the inverter also runs off-grid and can briefly deliver up to 40 kW (2 × rated power) for 10 s.

Can a diesel generator be connected to the Deye SUN-20K-SG05LP3-EU-SM2?

Yes, the manufacturer states the inverter supports storing energy from a diesel generator.

Can the bundle be combined with an existing solar PV system?

Yes, the manufacturer states that AC coupling with existing solar systems is possible.

Can I increase the battery capacity?

Hybrid Energy calculates how many modules your site needs and whether your inverter supports them.

Will the battery suit my inverter?

High-voltage and low-voltage systems are not compatible, and each manufacturer has its own list of approved pairs. Tell Hybrid Energy which inverter is already installed and we will check before you order.

Sources

• Deye – manufacturer website (SUN-14/15/16/18/20K-SG05LP3-EU-SM2 series)
• Deye SE-G5.1 Pro-B battery module, manufacturer page
• ESO (Lithuanian grid operator) — Electricity storage devices, checked 2026-10-26