Hearth Residential ESS

Daylight, stored for the night.

A modular 8–32 kWh residential storage series, available in high-voltage integrated and low-voltage stackable architectures, for daytime solar shifting and selected critical-load backup in homes, farmhouses and rural premises.

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Residential & home storage · 8–32 kWh modular stacking

Hearth 8

High-voltage integrated · DC-coupled

8 kWh · 550 V high voltage
0.5P (charge / discharge)

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Hearth 16 Stack

Low-voltage stacked · 2 modules

16 kWh · 51.2 V low voltage
120 A (0.3P @25 °C)

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Hearth 16 FS

Low-voltage floor-standing · wall-adjacent

16 kWh · 51.2 V low voltage
120 A (0.3P @25 °C)

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Key highlights

Hard numbers, visible longevity.

6000 cycles Cycle life @80% DOD 314 Ah large-format LFP cells. At one cycle a day, that is over 16 years. 314 Ah Large-format cells The whole series runs on LFP 314 Ah large-format cells, for higher pack energy density and slower degradation. IP65 Ingress protection Fanless natural-convection cooling runs silent, indoors or out; charge 0–55 °C / discharge -20–55 °C. 16 units Parallel expansion limit Low-voltage models start at 2 units in parallel and scale to 16 units plus a DC Combiner. Add capacity in stages as load and EV demand grow. 8–16 kWh Capacity range From 8 kWh high-voltage integrated up to 16 kWh low-voltage stacked or slim floor-standing. Between them they cover most household daily storage needs.

Applications

At home in every kind of home.

From city villas to high-demand homes, one product line covers the main residential storage scenarios.

**City villa · PV self-consumption** Store solar power by day, use it at night. That raises self-consumption and lowers bills.

**High-demand homes · Stackable expansion** Start at 16 kWh and parallel up to 16 units, growing with household loads and EV charging.

**Tight spaces · Slim floor-standing** A 550 × 860 × 175 mm slim body sits against the wall, so you get big capacity even where walls can't be drilled.

**All-climate · Outdoor installation** IP65 and natural-convection cooling, charge 0–55 °C / discharge -20–55 °C. Suited to indoor and outdoor installation right across the series.

Specifications

Compare line by line, choose by need.

Model

Hearth 8 View details ›

Hearth 16 Stack View details ›

Hearth 16 FS View details ›

Architecture

Hearth 8 High-voltage integrated

Battery and BMS in one unit, stackable
DC-coupled high-voltage hybrid inverter

Hearth 16 Stack Low-voltage stacked

Battery and BMS in one unit, 2 modules stacked
DC-coupled to low-voltage hybrid inverter

Hearth 16 FS Low-voltage slim floor-standing

Battery and BMS in one unit
Slim enclosure, wall-adjacent floor mounting

Form factor

Hearth 8 High-voltage integrated · DC-coupled

Hearth 16 Stack Low-voltage stacked · 2 modules

Hearth 16 FS Low-voltage floor-standing · wall-adjacent

Capacity & voltage

Nominal capacity

Hearth 8 8 kWh

All-in-one unit, no external battery cabinet required

Hearth 16 Stack 16 kWh

8038.4 Wh × 2 modules

Hearth 16 FS 16 kWh

Single cabinet, all-in-one

Voltage platform

Hearth 8 550 V high voltage

Pairs with high-voltage hybrid inverter

Hearth 16 Stack 51.2 V low voltage

Pairs with low-voltage hybrid inverter

Hearth 16 FS 51.2 V low voltage

Pairs with low-voltage hybrid inverter

Electrical performance

Continuous charge / discharge

Hearth 8 0.5P (charge / discharge)

Peak 4 kW

Hearth 16 Stack 120 A (0.3P @25 °C)

Peak 205 A

Hearth 16 FS 120 A (0.3P @25 °C)

Peak 205 A

Rated power

Hearth 8 —

Hearth 16 Stack 5 kW

Hearth 16 FS —

Cycle life

≥6000 cycles @80% DOD

Backup reserve

Reserved per selected SOC window

Battery & BMS

Cell chemistry

LFP · 314 Ah

Same large-format cells across the series, for higher pack energy density and slower degradation

Depth of discharge

≤ 90% DOD

Recommended operating window

BMS

Touchscreen · dual RS485

Passive balancing
SOC / SOH accuracy ≤1%
7-channel temperature monitoring

Communication

Hearth 8 CAN / RS485

Compatible with high-voltage hybrid inverters; ask us for the compatibility list

Hearth 16 Stack CAN / RS485

Compatible with low-voltage hybrid inverters; ask us for the compatibility list

Hearth 16 FS CAN / RS485

Compatible with low-voltage hybrid inverters; ask us for the compatibility list

Structure & protection

Ingress protection

IP65

Natural-convection cooling, fanless and silent

Mounting

Hearth 8 Stackable

Hearth 16 Stack Stackable

Hearth 16 FS Floor-standing

Wall-adjacent installation

Dimensions^[1]

Hearth 8 988 × 300 × 278 mm

Width: 988 mm
Depth: 300 mm
Height: 278 mm

Hearth 16 Stack 700 × 350 × 260 mm

Width: 700 mm
Depth: 350 mm
Height: 260 mm

Hearth 16 FS 550 × 860 × 175 mm (G1)

Width: 550 mm
Depth: 860 mm
Height: 175 mm

Weight

Hearth 8 85 kg

Hearth 16 Stack Approx. 170 kg

Hearth 16 FS Approx. 140 kg

Operating environment

All models

Installation：Indoor / outdoor (IP65)
Charging temperature：0 ~ 55 °C
Discharging temperature：-20 ~ 55 °C
Cooling：natural convection, fanless and silent

Scalability

Parallel expansion

Hearth 8 Up to 6 modules per string

Up to 16 modules per system

Hearth 16 Stack Parallel from 2 units

Up to 16 units + DC Combiner

Hearth 16 FS Parallel from 2 units

Up to 16 units + DC Combiner

Selection notes

Invest in stages based on load and EV needs

Start with 2 units for the current load, expand in parallel as needed
Select based on the exact model and inverter pairing; do not commit to runtime from capacity alone

Compliance & certification

All models

IEC series：IEC 62619
Transport：UN38.3
Grid / local：per project location regulations
Approved inverters：per model mapping list
Circuit breaker (16 Stack)：NDB1-125C125/1+MX+OF (UL1077)

[1] Dimensions are given as W × D × H, excluding installation clearance and cable routing.

Cell chemistry, BMS, communication interface, ingress protection and operating temperature are common across the series; repeating them per column is only for side-by-side comparison. On narrow screens the table stacks by model automatically.