What precautions should I take before installing/adding Stackable Micro Battery?

When installing/adding expansion batteries, it is necessary to power off and shut down the system to protect yourself and the machine. Performing this operation while powered on is not covered under warranty. Please follow the steps below for proper installation: a. Disconnect the Micro Storage Unit and the solar panels. b. Press the on/off button for 2 seconds to turn off the power. c. After turning off the Micro Storage Unit, install the expansion batteries to the Micro Storage Unit. d. Connect solar panels for normal use.

Are there any other precautions that need to be taken when installing and using the product?

Ensure that the AC outlet is properly grounded.

Can I change the battery to the Micro Storage Battery or Stackable Micro Battery by myself?

No. If your battery in Micro Storage Unit or Stackable Micro Battery does not work or working conditions do not meet expectations, please contact the TSUN customer service team for further help.

How to make sure the equipment is safely grounded?

The included AC end cable already ensures that the machine is safely grounded, so there's no need to worry.

Are microinverters required to use Micro Storage Unit?

Micro Storage Unit does not require a microinverter. A microinverter is already incorporated into its all-in-one design that also includes a photovoltaic controller and energy storage battery pack.

Can the Micro Storage Unit charge batteries using the household power grid?

Yes, the Micro Storage Unit can charge your batteries using your home's AC power. It can be scheduled to do so during off-peak hours to reduce costs, and will also automatically charge AC power when the batteries are low and there is insufficient solar power, preventing battery damage and ensuring that you have some reserve energy available.

How do I use Micro Storage Unit to achieve zero-power function?

You need to buy our optional accessory smart meter, which prevents energy back-flow to the public grid by adjusting the output power of the Micro Storage Unit, matching household load in real-time. This achieves the purpose of not transmitting energy to the public grid, which is the anti-back-flow function.

How does the smart meter help Micro Storage Unit achieve zero energy waste?

The smart meter detects the total household electricity consumption, which lets Micro Storage Unit continually adjust output power. It's real-time and precise electrical discharge for your home, helping you achieve efficient energy use without waste.

PowerTrunk (Micro AC Coupled Unit)

MAU2000Lite 2-10 kWh
MAU4000Lite 4-20 kWh

The MAU4000Lite and MAU2000Lite are versatile AC-coupled energy storage systems, perfect for upgrading existing grid-tied setups or powering new microinverter-based installations. They empower homeowners to slash electricity bills by maximizing self-consumption and intelligently shifting energy use during high-tariff periods.
Designed to grow with your needs, these units support flexible parallel expansion for both single-phase and three-phase systems. At their heart are durable 314Ah high-cycle cells paired with TSUN’s proprietary Battery Optimizer technology. This unique feature allows you to mix existing and new battery modules without performance loss—eliminating traditional matching issues while ensuring long-term safety and peak efficiency.

DATASHEET

Products Storage System Micro Storage System PowerTrunk (Micro AC Coupled Unit)

PowerTrunk Lite Series

• All-in-One Architecture: AC-coupled unit for effortless solar integration.
• Smart Grid Interaction: Charge from grid & discharge to load for TOU optimization.
• Extreme Versatility: Stable operation within -20°C to 55°C ambient temperature.

Superior Safety. Elite Performance. Simplified.

The PowerTrunk MAU2000/4000Lite is an elite, AC-coupled energy storage solution. By bridging the gap between microinverters and batteries, it allows you to store surplus solar power for 24/7 use and emergency backup.

Plug & Play Design — No Professional Electrician Required

AC coupled solar storage

Max Performance

Scalable up to 20kWh: Optimized for high-efficiency energy harvesting and long-term stability with an industry-leading 10,000-cycle design life.

10,000

Life Cycles

2500 W

Max. AC Input

2 / 4 kWh

Battery per Unit

20 kWh

Max. System Capacity

Max Performance

Scalable up to 20kWh:
Optimized for high-efficiency energy harvesting and long-term stability with 10,000-cycle design life.

10,000

Life Cycles

2500 W

Max. AC Input

2 / 4 kWh

Battery per Unit

20 kWh

Max. System Capacity

Intelligent Energy Management

Zero Export Control

Pair with a Smart Meter to ensure every watt of solar power is consumed locally, preventing grid feed-in.

Smart App Monitoring

Integrated WiFi & Bluetooth allow real-time energy tracking and system optimization via App.

Specs

Download Files ▼

MAU Lite Datasheet (PDF)

Model	MAU2000Lite	MAU4000Lite
Battery Type	LiFePO4 (LFP)
Capacity (kWh)	2	4
Max. System Capacity	10 kWh	20 kWh
Life Cycle	10,000 (@25°C)
Max. Output Power [W]	800 / 2000
Max. Input Power [W]	2500
Dimensions (mm)	583 × 333 × 375
IP Rating	IP65
Temp. Range	-20°C to 55°C

*Only partial parameters are listed. For the complete specification list, please refer to the official datasheet.

Frequently Asked Questions

What precautions should I take before installing/adding Stackable Micro Battery?

A :

When installing/adding expansion batteries, it is necessary to power off and shut down the system to protect yourself and the machine. Performing this operation while powered on is not covered under warranty. Please follow the steps below for proper installation: a. Disconnect the Micro Storage Unit and the solar panels. b. Press the on/off button for 2 seconds to turn off the power. c. After turning off the Micro Storage Unit, install the expansion batteries to the Micro Storage Unit. d. Connect solar panels for normal use.
Are there any other precautions that need to be taken when installing and using the product?

A :

Ensure that the AC outlet is properly grounded.
Can I change the battery to the Micro Storage Battery or Stackable Micro Battery by myself?

A :

No. If your battery in Micro Storage Unit or Stackable Micro Battery does not work or working conditions do not meet expectations, please contact the TSUN customer service team for further help.
How to make sure the equipment is safely grounded?

A :

The included AC end cable already ensures that the machine is safely grounded, so there's no need to worry.
Are microinverters required to use Micro Storage Unit?

A :

Micro Storage Unit does not require a microinverter. A microinverter is already incorporated into its all-in-one design that also includes a photovoltaic controller and energy storage battery pack.
Can the Micro Storage Unit charge batteries using the household power grid?

A :

Yes, the Micro Storage Unit can charge your batteries using your home's AC power. It can be scheduled to do so during off-peak hours to reduce costs, and will also automatically charge AC power when the batteries are low and there is insufficient solar power, preventing battery damage and ensuring that you have some reserve energy available.
How do I use Micro Storage Unit to achieve zero-power function?

A :

You need to buy our optional accessory smart meter, which prevents energy back-flow to the public grid by adjusting the output power of the Micro Storage Unit, matching household load in real-time. This achieves the purpose of not transmitting energy to the public grid, which is the anti-back-flow function.
How does the smart meter help Micro Storage Unit achieve zero energy waste?

A :

The smart meter detects the total household electricity consumption, which lets Micro Storage Unit continually adjust output power. It's real-time and precise electrical discharge for your home, helping you achieve efficient energy use without waste.