Hearth 16 Stack
Low-voltage stackable home ESS

A serviceable low-voltage energy block for farms, workshops and small businesses using a compatible 48/51.2 V hybrid inverter and a short protected DC route.

Product features

What one unit can do

314Ah large-format cells

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

205A peak output

120 A (0.3P @25 °C)

integrated BMS

Touchscreen · dual RS485

IP65 protected, fanless

Natural-convection cooling, fanless and silent

inverter compatibility

CAN / RS485

170kg unit weight

700 × 350 × 260 mm

Project fit

Start with the voltage window and the inverter pairing

Hearth 16 Stack is a stackable 16 kWh low-voltage ESS. Selection comes down to the voltage window, protocol, power and current limits, usable-energy target, installation environment and the approved inverter list.

Typical scenarios

Stack and grow with the household's demand

  • Home backupKeep critical circuits (fridge, lighting, comms, medical devices) running through a grid outage
  • Self-consumptionStore rooftop PV surplus in the battery and release it at night, raising self-use and lowering bills
  • Low-voltage hybrid inverter systemsThe 51.2 V platform pairs with mainstream low-voltage hybrid inverters, with PV, battery and grid designed as one
  • High-usage / EV householdsStart at 16 kWh, enough for heavy loads and EV charging
  • Staged expansionExpand quickly from 2 units in parallel up to 16 units plus a DC Combiner as demand grows
Request a tailored plan
Core data
0VLow-voltage safe platform
0kWhNominal energy
0unitsMax units in parallel
0cyclesCycle life @80% DOD

LFP 314 Ah large-format cells · IP65 natural convection · BMS delivered as one unit

Specifications

Hearth 16 Stack detailed specifications

Model

Model code
ZT-REES-LV-ST-16k
Architecture
Low-voltage stacked
Form factor
Low-voltage stacked · 2 modules

Capacity & voltage

Nominal capacity
16 kWh
Voltage platform
51.2 V low voltage

Electrical performance

Continuous charge / discharge
120 A (0.3P @25 °C)
Rated power
5 kW
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
CAN / RS485

Structure & protection

Ingress protection
IP65 Natural-convection cooling, fanless and silent
Mounting
Stackable
Dimensions
700 × 350 × 260 mm
Weight
Approx. 170 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
Parallel from 2 units
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)