SolarFlow 2400 AC+: The Ultimate Product Guide

This guide offers a deep dive into the engineering behind the SolarFlow 2400 AC+. We will explain how this AC-coupled storage system works, its key specifications, and its real-world benefits. Built for homes with existing rooftop solar (either micro-inverter or string inverter systems), the system allows you to store and use more of your own power, reducing reliance on the grid.

What is the SolarFlow 2400 AC+?

The SolarFlow 2400 AC+ is an integrated, AC-coupled, "plug-and-play" solar battery system. Its primary goal is to seamlessly integrate existing rooftop solar PV systems with energy storage.

In traditional solar systems without storage, surplus energy generated during the day is often fed back into the grid at a low price, while users need to buy expensive power back at night. The SolarFlow 2400 AC+ captures this surplus energy and stores it in local batteries. By doing so, the system significantly reduces the amount of electricity exported to the grid, prevents energy waste, and cuts household electricity bills.

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How Does SolarFlow 2400 AC+ Work?

The SolarFlow 2400 AC+ utilises two complementary energy scheduling strategies to achieve maximum economic efficiency.

1. Storing Surplus Rooftop Solar

For users with existing rooftop solar, the system stores excess power generated during the day that is not consumed by household loads, making it available for night-time use:

• Capturing Surplus: When your rooftop solar generates more than your home requires, the excess AC power would normally flow to the grid. The SolarFlow 2400 AC+ monitors and absorbs this surplus through its AC port.
• Storing Energy: It converts the absorbed AC power into DC power and stores it in the battery units below.
• Peak Discharge: Once the sun sets or household demand spikes (e.g., during the 6 pm evening peak), the system converts the stored DC power back into AC power to supply household appliances.

2. Dynamic Tariff Optimisation

For users on dynamic or Time-of-Use (TOU) tariffs, the system uses AI algorithms to access real-time pricing:

• Off-Peak Periods: When grid prices are low (e.g., overnight) and the battery is not full, the system charges directly from the grid to store cheap energy.
• Peak Periods: During expensive peak hours, the system prioritizes using this stored energy to power your home appliances.

Hardware: Strong and Stable Performance

Feature 1. Plug and Play

The system features a highly integrated design and is 100% compatible with standard rooftop solar inverters. You do not need to modify existing DC solar wiring or replace your current inverter. Simply plug the system into a standard home socket. The entire process —from unboxing and installation to app activation — takes approximately ten minutes and requires no professional electrician or complex administrative permits.

Feature 2. 2400W Bi-directional AC Power

➤ 2400W Input Power

Input power determines how fast the system charges the battery using excess solar or cheap grid electricity. During sunny periods, rooftop systems generate a lot of extra power. The 2400W input capacity ensures the system captures this energy with maximum efficiency.

What this means for you: Even during winter or spring when daylight hours are limited, this high charging speed allows the battery to fill up quickly, ensuring you have ample power for the night.

➤ 2400W Output Power

Output power is the total capacity the battery has to supply household appliances. A 2400W output easily covers high-energy appliances such as dishwashers, washing machines, and small heat pumps.

What this means for you: During evening peaks when multiple appliances may run simultaneously, lower-power systems (e.g., 1200W) often fail to cover the load, forcing you to buy power from the grid. The SolarFlow 2400 AC+ significantly reduces or even eliminates this reliance on grid purchases.

Feature 3. Flexible Expansion: 2.4kWh to 16.8kWh

The system comes standard with a 2.4kWh capacity, which can be expanded like building blocks by adding battery units such as the AB3000L (2.88kWh each). Whether you are a small household needing basic night-time lighting or a large detached home requiring high-power heating, the maximum capacity of 16.8kWh can meet your needs.

Feature 4. RJ45 Port for Stable Connection

To solve the issue of unstable home Wi-Fi, the SolarFlow 2400 AC+ includes an RJ45 port.

You can establish a physical connection to smart monitoring devices like the Zendure 3CT-S or 1CT-S, ensuring continuous, stable communication and preventing energy scheduling delays caused by signal drops.

Feature 5. ZenGuard™ Safety System

Safety is non-negotiable for home storage. The ZenGuard system provides three layers of protection:

• Dual BMS (Double Insurance): The system monitors voltage, current, and temperature locally and syncs with the cloud for double-layered checks against potential risks.
• Self-Heating Technology: Unlike traditional batteries that cannot charge below freezing, this system includes a heating module. In extreme winter conditions, it uses smart AC wake-up to warm the battery, ensuring it remains functional and healthy even below 0°C.
• Aerosol Fire Extinguisher: If the system detects a serious anomaly and internal temperatures reach approximately 170°C, an aerosol extinguisher activates automatically. It releases a cooling and suppressing mist to contain fire without leaving harmful residues.

Feature 6. 2400VA Off-Grid Output: Your Emergency Haven

In the event of a power cut, the SolarFlow 2400 AC+ detects the failure and switches to battery power within 15 milliseconds. Through a dedicated off-grid socket, it provides up to 2400VA of output, ensuring your fridge, Wi-Fi, essential lighting, or medical devices keep running.

Note: In grid-tied mode, the off-grid port output can scale up to 3200W to cover higher power demands.

HEMS: Your Smart Energy Butler

The SolarFlow 2400 AC+ is equipped with a powerful HEMS (Home Energy Management System), integrating state-of-the-art energy technology into your household. By seamlessly connecting and optimising every link in the energy chain—from generation and storage to consumption—it provides precision management that significantly reduces electricity bills, boosts energy efficiency, and creates a smart energy ecosystem for sustainable living.

Key Features of the HEMS:

• Tailored Energy Modes: We provide personalised energy management modes (Zenki, Auto, and Expert) to suit various needs. Whether you are a seasoned energy expert or a typical user focused on daily consumption, there is a mode perfectly suited to your lifestyle.
• ZENKI AI Optimisation: Zenki mode’s artificial intelligence optimises energy consumption based on real-time electricity prices, weather forecasts, and usage patterns. By prioritising clean energy (low-cost grid power and solar), Zenki can boost your electricity savings by approximately 73%.
• Extensive Provider Integration: The system is connected to power data from over 840 major electricity providers across 32 European markets, including EDF France. It also supports basic data retrieval. By connecting to European power exchanges such as GME and OMIE, you can select your specific tariff, allowing the system to automatically receive real-time pricing. This enables the battery to charge at lower prices, maximising cost-efficiency. You can also monitor real-time usage and expenditure data via the app.
• Heat Pump and EV Compatibility: Create a highly efficient energy ecosystem with support for over 5,000 heat pump models and various electric vehicles. You can use surplus solar energy or low-cost electricity to pre-heat your heat pump, significantly slashing heating costs. Furthermore, you can charge your EV (such as a Tesla) economically and sustainably, ensuring the lowest possible cost and carbon footprint.
• Smart Device Integration: If you wish to integrate energy data with HEMS 2.0 without replacing your existing kit, Zendure is fully compatible with various smart accessories from Shelly, and EverHome. This allows you to utilise your existing smart home setup without additional investment, reducing the overall cost of your Zendure system.
• MQTT Support: The system supports the MQTT protocol, enabling integration with platforms like Home Assistant and Homey. This allows for a bespoke smart home experience where you can freely customise energy plans to enhance the comfort and convenience of your daily life.
• Multi-Property Management: Under a single ID, you can configure independent HEMS for multiple residences. Each HEMS system can manage up to 6 devices, meeting the demands of managing energy scheduling across different properties and loads simultaneously.
• Comprehensive Data Management: The system provides a wealth of real-time data, including PV generation, battery charge/discharge rates, household appliance consumption, and grid purchases. You can also view energy reports across different periods (day, week, month, or year) to understand your energy patterns and see your contribution to global environmental sustainability.

Technical Specifications

Summary

If you already have a rooftop solar system and wish to increase your solar self-consumption, the SolarFlow 2400 AC+ is the most compatible and powerful plug-and-play home battery solution currently on the market. It doesn't just maximise your solar efficiency, it uses industrial-grade safety and AI scheduling to slash your energy costs while providing 24/7 power assurance.