AI-W5.1-B Stackable Battery · 5.12 kWh
AI-W5.1-B
5.12–184.32 kWh
The stackable 5.12 kWh LFP battery module used in the AI-W5.1 all-in-one system — also pairs with Deye 48 V hybrids. Tool-free stacking of 1–6 modules on a battery-only stack (5.12–30.72 kWh) or 1–5 under the all-in-one inverter, IP65, ≥6000 cycles.
- Module energy
- 5.12 kWh (5.12 kWh usable)
- Nominal voltage
- 51.2 V
- Module capacity
- 100 Ah
- Configuration
- 1–6 per battery-only stack (PDU1) · 1–5 under the inverter (PDU3)
- Chemistry
- LiFePO4 (cobalt-free)
- Cycle life
- ≥6000 (70% EOL)
- IP rating
- IP65 (after stacking)
- Warranty
- 10 years
Specifications
Module
- Cell chemistry
- LiFePO4
- Module energy
- 5.12 kWh
- Usable energy
- 5.12 kWh (100% DoD)
- Nominal voltage
- 51.2 V
- Operating voltage
- 44.8–57.6 V
- Module capacity
- 100 Ah
- Module dimensions (W×D×H)
- 720 × 255 × 300 mm (without terminal parts)
- Module weight
- 53 kg
- Built-in breaker
- 125 A 2P, 60 Vdc
System
- Modules per stack
- 1–6 on a battery-only stack (PDU1) · 1–5 under the all-in-one inverter (PDU3)
- Stacks in parallel
- Up to 6 (36 modules, max 184 kWh)
- Nominal energy
- 5.12–30.72 kWh per stack (1–6 modules)
- Rated DC power
- 2.5–12 kW (by configuration)
- Max. charge / discharge current
- 100–250 A (by configuration)
- Peak current
- 150–360 A (10 s, 25 °C; by configuration)
- Recommended DoD
- 100%
- PDU built-in breaker (AI-W5.1-PDU1-B / PDU3-B)
- Two-pole moulded case, 250 A, 1000 V
General
- Operating temperature
- Charge 0–55 °C · Discharge −20–55 °C
- Communication
- CAN 2.0 / RS485
- Installation
- Floor-mounted
- Cycle life
- ≥6000 (25 °C ± 2 °C, 0.5C/0.5C, 70% EOL)
- Certification
- UN38.3, IEC62619, CE, UK, VDE2510-50, CEI 0-21, CE-LVD, FCC, UL1973, UL9540A
- Energy throughput
- 16 MWh per module @ 70% EOL
- Warranty
- 10 years (conditions apply — see the Deye warranty letter)
Highlights
- The battery in the AI-W5.1 all-in-one system — and a standalone 48 V LFP battery for Deye hybrids.
- Tool-free stacking — 1–6 modules on a battery-only stack with the PDU1 (5.12–30.72 kWh), or 1–5 under the all-in-one inverter with the PDU3; flat, stackable, floor-mounted on a base.
- IP65 after stacking, natural cooling; discharges from −20 to 55 °C and charges from 0 to 55 °C.
- Intelligent BMS with auto-networking, remote monitoring and firmware upgrade.
- 100% recommended DoD — the full 5.12 kWh is usable, which is what the federal battery rebate is calculated on.
- ≥6000 cycles (25 °C ± 2 °C, 0.5C/0.5C, 70% EOL) and a 10-year warranty.
Stacks and PDUs
- Battery-only stack: 1 × AI-W5.1-PDU1-B + 1–6 modules + 1 × Base. This is how the battery connects to a Deye 48 V wall-mounted hybrid, and it is also the expansion stack for an all-in-one system.
- Under the all-in-one inverter: 1 × AI-W5.1-PDU3-B + 1–5 modules + 1 × Base, with the inverter on top. The inverter stack holds at most five modules.
- Stacks link PDU to PDU through the built-in DC bus, up to six stacks in parallel. See PDU1 vs PDU3 and the AI-W5.1 All-in-One BESS for when a combiner box is needed.
- With a wall-mounted hybrid: one stack supports an inverter of up to 12 kW. For 14–20 kW inverters with two battery inputs, Deye’s AU PDU manual connects the stacks to both inputs (its “multiple battery systems” mode). Where several inverters share the bank, a DC bus and combiner box are supplied by the installer.
The module comes in more than one version. Deye’s AU part list carries it without heating film, in the original structure and in a newer structure with plastic carry handles. The part list also includes a heated version (heating film) that extends charging down to −20 °C, but the standard module has no heating. Plan for charging from 0 °C, and ask Suncloud if a site needs low-temperature charging.
Figures are from Deye’s AU documents: the AI-W-B Series datasheet (V1.0, 14 March 2026), the AI-W5.1-B-ESS Series brochure (V1.0, 28 August 2026) for the PDU breaker row and the stack limits, the AI-WX-B PDU1/PDU3 user manual (issue 03, 30 March 2026) for wall-hybrid connection, and Deye’s AU part-number list (10 September 2026) for the module versions. Usable energy is 5.12 kWh at 100% DoD. An earlier sheet (V2.1, 2024) stated 4.6 kWh at 90% DoD and has been superseded, and the battery tables printed inside the all-in-one inverter manuals still show those older figures — check the date on any sheet you hold. The PDU manual’s PDU3 installation steps allow up to six modules per cluster, but the newer brochure and part list limit a stack with the inverter on top to five — design to five, and confirm the configuration with Suncloud before quoting.
Plan & design
Before anything is ordered — sizing, pairing and design decisions for the AI-W5.1-B Stackable Battery · 5.12 kWh.
Install & commission
On the wall, wired, energised and registered — in the order the job actually runs.
Operate & configure
Monitoring, tariffs, work modes — getting the most out of the system after handover.
Documents
Everything published for the AI-W5.1-B Stackable Battery · 5.12 kWh — and where something is missing, it says so instead of hiding the row.
System & shared documents
Not specific to the AI-W5.1-B Stackable Battery · 5.12 kWh — these apply across the range and live here once, not copied per model.
