Power Distribution Unit & Base for AI-W5.1-B Stack (IP65, with Cables & BMS Comms)
The Deye AI-W5.1-PDU1-B + Base is the top “brains” and bottom “stand” for the stackable AI-W5.1-B 5.12 kWh batteries. It includes the power distribution unit (PDU), base, built-in DC breaker, IP65 enclosure, and factory DC power + BMS communication cables to connect your battery stack cleanly to a Deye hybrid inverter. In short: this is what turns a pile of AI-W5.1-B modules into a tidy, safe, plug-together battery system.
BSC Renewables uses this unit whenever they install AI-W5.1-B stackable batteries, so your system ends up neat, compliant and easy to expand.
What Is the AI-W5.1-PDU1-B + Base?
The AI-W5.1-PDU1-B + Base offers:
- Power Distribution Unit I (PDU1) – sits on top of the stack
- Battery Base – sits at the bottom of the tower
- Provides a stable footprint for the stack
- Designed to match the AI-W5.1-B module footprint
- Provides a stable footprint for the stack
It is also described as the “BMS & Base Unit” or “control box & base” for the AI-W5.1-B low-voltage stacked battery.
It includes a pair of DC power cables and a BMS communication cable sized to connect straight to compatible Deye hybrid inverters.
Why This Unit Matters for Your Battery System
1. Turns Loose Modules into a Proper “Battery System”
On their own, AI-W5.1-B modules are just individual battery blocks. The PDU1 + Base:
- Physically organises the stack – base at the bottom, PDU at the top, modules in between
- Provides the single set of power and comms connections to the inverter
- Gives a clear status display on the top unit
For you, that means you don’t end up with a messy tangle of cables. You get a clean, tower-style battery that looks and behaves like one integrated product.
2. Cleaner, Faster, “Cable-Light” Install
It is designed to enable clean, cable-free installs with auto-networking and modular integration for up to six AI-W5.1-B modules per string.
In practice:
- The DC power cables and BMS comm cable are included and matched to the system
- The PDU provides a single point of connection for battery power and comms
- AI-W5.1-B modules simply stack and plug into the PDU/Base system
That saves time on site and reduces the chance of wiring errors – which is good for safety, reliability and future servicing.
3. Built-In Protection & Status at a Glance
When you choose this model:
- The PDU includes a 250 A, 2-pole DC circuit breaker (up to 1000 Vdc)
- The unit provides an LED indication of system status
Benefits for you:
- You have a dedicated DC breaker right at the battery stack for isolation and protection
- Installers and service techs can see status quickly from the PDU’s indicator LEDs, rather than hunting through menus
- It ties in with the AI-W5.1-B’s intelligent BMS, which communicates with compatible Deye inverters for proper charge/discharge control and state-of-charge reporting
4. IP65 – Ready for Real-World Aussie Conditions
The AI-W5.1 stack system is rated IP65:
What that means:
- Dust-tight and protected against low-pressure water jets
- Suited to garages, plant areas and under-cover outdoor locations
- Designed to be part of a long-term, low-maintenance storage solution in typical Australian environments
BSC Renewables will still choose a sensible spot – usually somewhere shaded, secure and accessible – but IP65 gives plenty of flexibility.
5. Sized to Match the AI-W5.1-B Stack
It fits:
- AI-W5.1-B module: approx. 720 × 255 × 300 mm, ~53 kg
- AI-W5.1-PDU1-B: approx. 720 × 255 × 238 mm, ~15 kg
- AI-W5.1-Base: approx. 720 × 255 × 68 mm, ~6.5 kg
The PDU and base are:
- The same footprint as the battery modules – so your stack is straight and tidy
- Light enough that, as the AI-W5.1-B user manual notes, the PDU and Base can be handled by one person, while battery modules require two.
That makes builds more manageable and reduces install time.
Key Features of AI-W5.1-PDU1-B + Base
- Type: Power Distribution Unit + Battery Base for AI-W5.1-B stacked battery
- Role:
- Connects stacked battery modules to the Deye hybrid inverter
- Provides DC power and BMS communication interface
- LED display for status indication
- Connects stacked battery modules to the Deye hybrid inverter
- Enclosure rating: IP65 (same system class as AI-W5.1-B stack)
- Internal protection: Built-in DC circuit breaker (approx. 250 A, 2-pole, 1000 Vdc – AU spec)
- Supplied with:
- Pair of DC power cables
- BMS communication cable for connection to a compatible Deye inverter
- Pair of DC power cables
- Dimensions (approx.):
- PDU: 720 × 255 × 238 mm
- Base: 720 × 255 × 68 mm
- PDU: 720 × 255 × 238 mm
It’s not a battery by itself – it’s the control and connection kit that makes your AI-W5.1-B stack behave like one integrated energy storage system.
How BSC Renewables Uses the PDU1 + Base in Your System
When BSC Renewables designs a system with AI-W5.1-B stackable batteries, we’ll:
- Plan the stack correctly
- Decide how many AI-W5.1-B modules go in each stack (typically 2–6 per stack) based on your usage and inverter size
- Specify one AI-W5.1-PDU1-B + Base per stack to handle power distribution and comms
- Decide how many AI-W5.1-B modules go in each stack (typically 2–6 per stack) based on your usage and inverter size
- Install the base and PDU first
- Position the base on a level surface in the chosen location
- Fix the PDU and stack modules safely, following Deye’s AU installation manual
- Position the base on a level surface in the chosen location
- Connect to the inverter using the included cables
- Use the supplied DC power cables and BMS communication cable to connect the PDU directly to the Deye hybrid inverter’s battery ports
- Confirm that the inverter recognises the stack and is reading state of charge and limits correctly
- Use the supplied DC power cables and BMS communication cable to connect the PDU directly to the Deye hybrid inverter’s battery ports
- Test and commission the whole stack
- Check charge/discharge behaviour
- Verify LED status on the PDU
- Confirm that monitoring (where available) shows correct battery info
- Check charge/discharge behaviour
This way, your stacked Deye battery system doesn’t just look tidy – it operates the way Deye designed it to.
Ready to Build a Proper Deye Battery Stack?
If you’re planning AI-W5.1-B stackable batteries, the AI-W5.1-PDU1-B + Base is the bit that makes it all work together. Reach out to BSC Renewables and they’ll design a complete Deye battery stack and inverter setup that’s neat, compliant and ready to grow with you.