EASYWAY UNIV-HV ST23K 23.04 kWh High-Voltage Home Battery

The EASYWAY UNIV-HV ST23K is a modular high-voltage LiFePO4 home battery with 23.04 kWh total and 21.66 kWh usable capacity, at a nominal 230.4 V DC. It is built from 3 × 7.68 kWh modules plus a BMS, has an IP65 rating, and the manufacturer declares 6000 cycles to 80 % remaining capacity. It is intended for a house with a heat pump.

Technical specifications

Home battery for a heat pump: who is a 23.04 kWh battery for?

• A house with a heat pump
• Winter evening loads, when the heat pump runs for long periods

The number of phases is determined by the hybrid inverter, not by the battery.

High-voltage battery: which inverters is it compatible with?

The EASYWAY UNIV-HV ST23K is a high-voltage battery, so it connects to a high-voltage hybrid inverter. The manufacturer’s compatibility list names Solis, Deye, Pylontech, Growatt, GoodWe, Sofar, Victron, Solinteg and others, and compatibility is confirmed for the whole product line.

High-voltage and low-voltage systems are not compatible with each other, and each manufacturer has its own list of approved pairings. If your inverter is another brand, we check before you order.

How many hours does a 23.04 kWh battery last with solar panels?

At an average load of 2–3 kW (a house with a heat pump on a winter evening), the 21.66 kWh of usable capacity lasts roughly 7–11 hours. At −15 °C, when the heat pump runs almost continuously, that time gets shorter. At a load of around 1 kW it lasts about 23 hours, but treat that as an approximate figure.

If this capacity is not enough (in borderline cases where the heat pump runs almost non-stop at −15 °C, or when there is also an electric car), look at the 30.72 kWh capacity.

How do you connect a battery to a solar system?

The battery connects to a hybrid inverter and stores surplus solar energy so you can use it in the evening. 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

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

What to know before you buy

• Size and weight: 660 × 695 × 450 mm, 217 kg; the battery stands on the floor.
• Where to place it: the enclosure is rated IP65, but the manufacturer specifies indoor installation (5–95 % relative humidity, no condensation).
• Winter: without built-in heating, charging is possible only from 0 °C.
• Warranty: the 10-year warranty applies when the battery is connected to the internet.
• Safety and protection: built-in aerosol fire suppression, plus protection against overvoltage, overcurrent, short circuit and overheating.

Frequently asked questions

How long does 23.04 kWh last?

At an average load of 2–3 kW (a house with a heat pump on a winter evening), the 21.66 kWh of usable capacity lasts roughly 7–11 hours. Powerful appliances shorten that.

Is the ST23K right for my home or site?

The ST23K is intended for a house with a heat pump: at a 2–3 kW load, 21.66 kWh lasts roughly 7–11 hours. Hybrid Energy helps you work out whether this capacity will cover your site.

Which inverters is the EASYWAY UNIV-HV ST23K compatible with?

The manufacturer’s compatibility list names Solis, Deye, Pylontech, Growatt, GoodWe, Sofar, Victron, Solinteg and others. Hybrid Energy checks compatibility with your inverter before you order.

Is the ST23K a high-voltage battery?

Yes. The EASYWAY UNIV-HV ST23K has a nominal voltage of 230.4 V DC and a voltage range of 201.6–259.2 V DC. High-voltage and low-voltage systems are not compatible with each other.

What is the usable capacity of the ST23K?

Total capacity is 23.04 kWh and usable capacity is 21.66 kWh, with a recommended depth of discharge of 90 %.

How many cycles and what warranty?

The manufacturer declares 6000 cycles to 80 % remaining capacity and a 10-year warranty, which applies when the battery is connected to the internet.

Can the ST23K be installed outdoors?

The enclosure is rated IP65, but the manufacturer specifies installation indoors, where relative humidity is 5–95 % and there is no condensation.

Can the battery be charged in winter?

Without built-in heating, charging is possible only from 0 °C. We choose the location with this in mind.

What if 23.04 kWh is not enough?

The EASYWAY UNIV-HV ST23K is a modular system of 3 × 7.68 kWh + BMS. If this capacity is not enough (in borderline cases where the heat pump runs almost non-stop at −15 °C, or when there is also an electric car), look at the 30.72 kWh capacity.

How much does the ST23K weigh and how big is it?

The EASYWAY UNIV-HV ST23K weighs 217 kg and measures 660 × 695 × 450 mm. It is floor-standing.

Sources

• ESO — Energy storage systems, checked 2026-10-26