EASYWAY UNIV-HV ST15K 15.36 kWh High-Voltage Home Battery
€3,749.00
EASYWAY UNIV-HV ST15K is a 15.36 kWh high-voltage LiFePO4 home battery with 14.44 kWh usable capacity, rated for 6000 cycles and IP65.
- Free delivery across Lithuania
- 14-day returns — we pay for the return shipping
- Manufacturer warranty, CE compliant
The EASYWAY UNIV-HV ST15K is a modular high-voltage LiFePO4 home battery with 15.36 kWh total and 14.44 kWh usable capacity, at a nominal 153.6 V DC. It is built from 2 × 7.68 kWh modules plus a BMS, has an IP65 rating, and the manufacturer declares 6000 cycles to 80 % remaining capacity. It suits a medium-sized house that already has solar panels, and it works as a starter home battery that can be expanded later.
Technical specifications
| Parameter | Value |
|---|---|
| Model | ST15K |
| Manufacturer code | VBS91282 |
| Battery type | LiFePO4 (LFP) |
| Total capacity | 15.36 kWh |
| Usable capacity | 14.44 kWh |
| Modules | 2 × 7.68 kWh + BMS |
| Nominal voltage | 153.6 V DC |
| Voltage range | 134.4–172.8 V DC |
| Recommended charge / discharge current | 50 A / 50 A |
| Recommended depth of discharge (DoD) | 90 % |
| Dimensions (W × H × D) | 660 × 550 × 450 mm |
| Weight | 154 kg |
| Cycle life | 6000 cycles to 80 % remaining capacity |
| Communication | CAN / RS485 |
| Control | app + Wi-Fi |
| Ingress protection | IP65 |
| Mounting | floor-standing, modular |
| Cooling | natural convection |
| Fire safety | built-in aerosol fire suppression |
| Protections | overvoltage, overcurrent, short circuit and overheating |
| Certifications | CE, IEC 62619, UN38.3, cells UL 1973 |
| Warranty | 10 years (when connected to the internet) |
| Installation location | indoors: 5–95 % relative humidity, non-condensing |
| Charging without built-in heating | only from 0 °C |
Home battery storage: who is a 15.36 kWh battery for?
- A medium-sized house that already has a working solar system
- Evening and night loads of around 1–1.5 kW
- A starter home battery set-up that you can expand later
High-voltage battery: which inverters is it compatible with?
The EASYWAY UNIV-HV ST15K 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 15.36 kWh battery last with solar panels?
At an average load of 1–1.5 kW, the 14.44 kWh of usable capacity lasts roughly 10–14 hours. Switching on an electric cooker or a washing machine shortens that, so work it out from your real load. If the house has a heat pump or an electric car, look at the 23–30 kWh capacities in the manufacturer’s range.
Adding one 7.68 kWh module raises the capacity to 23.04 kWh, and the control unit and inverter stay the same.
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.”
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 × 550 × 450 mm, 154 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 15.36 kWh last?
At an evening and night load of 1–1.5 kW, the 14.44 kWh of usable capacity lasts roughly 10–14 hours. Powerful appliances shorten that.
Is the ST15K right for my home or site?
For a house without a heat pump, 14.44 kWh is usually enough; with a heat pump or an electric car, look at 23–30 kWh. Hybrid Energy helps you work out whether this capacity will cover your site.
Which inverters is the EASYWAY UNIV-HV ST15K 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 ST15K a high-voltage battery?
Yes. The EASYWAY UNIV-HV ST15K has a nominal voltage of 153.6 V DC and a voltage range of 134.4–172.8 V DC. High-voltage and low-voltage systems are not compatible with each other.
What is the usable capacity of the ST15K?
Total capacity is 15.36 kWh and usable capacity is 14.44 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 ST15K 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.
Can the ST15K be expanded?
The EASYWAY UNIV-HV ST15K is a modular system of 2 × 7.68 kWh + BMS. Adding one 7.68 kWh module raises capacity to 23.04 kWh, and the control unit and inverter stay the same.
How much does the ST15K weigh and how big is it?
The EASYWAY UNIV-HV ST15K weighs 154 kg and measures 660 × 550 × 450 mm. It is floor-standing.
Sources
- ESO — Energy storage systems, checked 2026-10-26
| Weight | 154 kg |
|---|---|
| Dimensions | 66 × 55 × 45 cm |
| Brand | EASYWAY |
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