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.

SolarTrunk (Micro Hybrid Storage Unit)

MSU4000Lite 4-20 kWh

The MSU4000Lite are hybrid energy storage systems that seamlessly integrate solar power generation and storage, making them the ideal choice for new solar installations. They empower homeowners to maximize energy independence and reduce electricity bills through intelligent self-consumption, Time-of-Use (TOU) shifting, and dynamic tariff optimization.
Built for flexible expansion, multiple units can operate in parallel to scale capacity for larger single-phase or three-phase applications. Powered by durable 314Ah high-cycle cells and TSUN’s proprietary Battery Optimizer technology, the system supports mixing existing and new batteries—eliminating matching concerns while enhancing safety, reliability, and long-term performance.

DATASHEET

Products Storage System Micro Storage System SolarTrunk (Micro Hybrid Storage Unit)

SolarTrunk MSU4000Lite Micro Hybrid Storage - All-in-One Solar Battery System

SolarTrunk All-in-One Solar Power Storage Banner

MSU4000Lite

SolarTrunk: Premium Micro Hybrid System

• Direct PV Input: Connects straight to solar panels. • All-in-One: Built-in inverter & battery core. • All-Weather: Reliable from -20°C to 55°C.

Scalable Home Solar Storage Installation

Scalable Capacity | Build Any Size

4kWh Modular Units: Easily stack up to 5 units to reach 20kWh.
Mix & Match: Seamlessly combine B2000Lite & B4000Lite.
High Output Power: Up to 10kW single-phase / 15kW three-phase.

Perfect for Expanding Solar Projects →

Designed for New Installations

2800W Max PV Input: Handles high-power panels effortlessly.
Hybrid Architecture: Streamlines components to reduce points of failure.

Simplified Solar Deployment →

Installer-Friendly Structure

Unified Die-Cast Chassis: Heavy-duty build for rapid site handling.
Safe Low-Voltage (<60V): No high-voltage certifications required.
2.5kW Robust Output: Powers heavy home loads reliably on or off-grid.

Faster Commissioning →

Plug & Play | Balcony to Backyard

15-Min Installation: Direct MC4 connections slash labor costs.
IP65 All-Weather Ready: Built-in heating allows placement anywhere.

Zero Hassle Setup →

Optimized for Urban Homes

Compact Design: Sleek unit mounts discreetly on walls or railings.
Zero-Footprint: Utilizes vertical space without cluttering the balcony.
Silent Operation: Operates quietly for peaceful apartment living.

Enhance Your Urban Solar Experience →

Intelligent Energy Flow

Smart AI Scheduling: Optimize energy usage with real-time solar data.
Peak Shaving: Automatically discharges during expensive peak rate hours.
Uninterrupted Power: Reliable backup for essential devices.

Smart Energy for High-Rise Life →

The Ultimate All-in-One Solution:
Empowering New Solar Installations.

The SolarTrunk MSU4000Lite Hybrid System is engineered for the fast-growing new residential solar market. By combining a high-efficiency inverter and a premium battery into one sleek unit, it directly connects to solar panels, eliminating the need for complex multi-component setups.

For Homeowners:

Direct Energy Harvesting: Maximize solar yield directly into storage.
Uninterrupted Power: Reliable home backup when the grid fails (≤10ms switch).

For Installers:

All-in-One Simplicity: No need to source separate inverters and batteries.
Labor Savings: True plug-and-play architecture drastically cuts install times.

Note: If you are looking to upgrade an existing grid-tied solar system without modifying your current PV wiring, explore our dedicated retrofit solution: the SolarTrunk Micro AC-Coupled Unit.

🚀 Win more solar projects with unbeatable efficiency:

Massive 2800W PV Input capacity handles modern high-power modules.
No professional electrician required for system deployment.
Premium Tier-1 LiFePO4 cells ensure 10,000-cycle longevity.

High Performance Solar Storage Capabilities

Max Performance

Industry-leading reliability designed for long-term energy independence.

10,000

Cycles Lifespan

2800 W

Max PV Input

4 kWh

Base Module

20 kWh

Expandable To

AI-Driven
Energy Core

Smart TOU Arbitrage

Automatically charges during low-cost off-peak hours and discharges during peak rates, maximizing your investment ROI.

Real-Time App Control

Track your solar yield, battery health, and household consumption instantly 24/7 via our intuitive mobile app.

Technical Specifications

Download Datasheet ↓

Model	MSU4000Lite
Max. PV Input	2800 W
Battery Type	LiFePO4 (LFP)
Capacity (kWh)	4
Life Cycle	10,000 (@25°C)
Max. Output Power	2500 W
Switch Time	≤10 ms
Dimensions (mm)	583 × 410 × 390
IP Rating	IP65

*Specifications are subject to change. Refer to 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.