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How Do I Install Multiple XXODD SpeedStacks?

This article explains how to correctly install multiple SpeedStacks, how to safely unlock higher discharge power, and how to avoid overloading your electrical installation.

Installing Multiple SpeedStacks

Always connect each SpeedStack directly to a dedicated wall outlet.
Do not connect the battery to extension cords, power strips, smart sockets, or other plug-in accessories.

Charging With Multiple SpeedStacks

When you install multiple SpeedStacks (maximum of 4), the charging power increases in steps of 800 W per battery:

  • 1 unit → 800 W
  • 2 units → 1600 W
  • 3 units → 2400 W
  • 4 units → 3200 W
When using multiple batteries, carefully consider the load on the electrical group (circuit) and the phase it is on. If the group becomes overloaded, it will shut off automatically for safety.

Recommendation:

Do not place multiple SpeedStacks on a group that also powers other heavy, long-running appliances (electric heaters, washing machines, dryers, etc.).

Rule of thumb:

For 3 or more batteries, split them across multiple groups or place them on a dedicated group with no other devices connected.

Discharging With Multiple SpeedStacks

With multiple units installed, the default discharge power remains 800 W.


For safety, the system will not discharge more on a shared group that also powers other appliances.If you want to unlock higher discharge power (up to 3200 W), the batteries must be installed on a dedicated group with no other devices connected.


We strongly recommend having this done by a certified installer.

Single-Phase Household

You may place the batteries on a single dedicated group, supporting:

  • 800 W
  • 1600 W
  • 2400 W
  • 3200 W

Always account for the maximum allowable load per phase.
Each SpeedStack adds 3.5 A.
If other appliances on the same phase draw too much power, the group may trip.

Ideally, place the batteries on the same phase as the solar inverter. If that’s not possible due to load limitations, distribute the batteries across different phases.

Three-Phase Household

You can place the batteries:
  • all on one dedicated group, or
  • distributed across multiple groups and phases, each with its own outlet.
Again, pay close attention to the maximum current per phase. If phase capacity becomes too tight, distribute the batteries more evenly.

Unlocking Higher Discharge Power

Higher discharge power can be unlocked in the XXODD App:

Settings → Devices → SpeedStack → Battery Group Settings → Safety Restriction

Only unlock higher discharge power if the batteries are on a dedicated group with no other devices connected.
This is essential for electrical and fire safety.

Why a Dedicated Circuit Group Is Important

Technically, there are other ways to install and unlock multiple batteries, but these methods introduce a much higher risk of user error — even among trained installers.
Examples:
  • Users may incorrectly assume groups are separated when they’re not.
  • Loads on shared circuits can fluctuate unpredictably.
  • A device on a different outlet may suddenly draw much more power than expected.
Think of it like driving 120 km/h on a 50 km/h road: If nobody’s around, you might feel safe — but the margin for error is tiny, and one mistake has big consequences.
Our experience shows that most people cannot accurately assess these risks. Therefore, our advice remains firm:

👉 Only unlock high discharge power when the SpeedStacks are on a dedicated group.
Doing otherwise is at your own risk.
This does not affect warranty — but it does affect the safety of your home.

Smart Control With Multiple Batteries

Each SpeedStack reacts dynamically to your home’s energy demand. Using real-time data from the P1 Meter, the system aims to bring your grid consumption to zero.
  • Below 800 W charging demand → one battery modulates smoothly
  • Above 800 W → additional batteries activate automatically
  • Power is distributed evenly for maximum efficiency
This approach uses multiple smaller inverters more efficiently than forcing a single large inverter to scale up and down.
Phase Balancing on Three-Phase Connections
The SpeedStack does not intentionally balance per phase. Your smart meter sums the power across all three phases, so the system focuses on balancing the total household flow, not each phase individually — which results in higher efficiency.
Maximum System Power
With four batteries (on a dedicated group):
  • Maximum charging: 3200 W
  • Maximum discharging: 3200 W (when unlocked)

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