Plugging in solar panels, storing the electricity and letting the system manage the home’s needs. On paper, Zendure’s promise is alluring. After three months of use, the SolarFlow 2400 Pro battery has largely convinced me, though it comes with a few drawbacks worth knowing before purchasing.
8 / 10
Darty
Producing your own electricity is a good thing. Being able to use it several hours after sunset is even better. For three months, I put the Zendure SolarFlow 2400 Pro through daily life with two 450 Wc bifacial solar panels installed in my yard and provided by the manufacturer for this test. My objective was to verify how much this battery could actually help me save on my electricity bill, but also whether its installation and daily use were as straightforward as promised.
On that specific point, the satisfaction is indeed there. Once the device was configured and the smart meter installed, the system effectively takes care of almost everything. Yet my experience also revealed a few limits. Here is my view of the Zendure SolarFlow 2400 Pro.
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Zendure did not skimp on the packaging. The battery arrives well protected and immediately exudes confidence thanks to its solid build and finishes. You can tell you’re dealing with equipment meant to stay in service for years.
One of the main advantages of this Pro version is that you can connect your solar panels directly, without the need to add a micro-inverter between the two. Its four independent MPPT inputs (via standard MC4 connectors) support up to 3,000 watts of solar power and allow optimization when panels have different orientations.
That’s also what sets it apart from the SolarFlow 2400 AC+, which is more suited to installations that already have an inverter, something three of our readers tested this summer.
My test setup is much more modest, with two bifacial panels totaling 900 Wc on their front face. Their peculiarity is also capturing a portion of light reflected from the back, although the gain heavily depends on the surroundings.
The connection was completed without any difficulty. Once the battery was linked to the solar panels, it simply needed to be plugged into a standard power outlet, through which it could inject the stored energy into the home’s electrical circuit. Pairing with the Zendure app and Wi‑Fi connection proved just as straightforward. Within a few minutes, the whole setup was recognized and ready to operate.
This simplicity is a real selling point. Provided you have a suitable installation and follow the manufacturer’s guidelines, you can set the system in operation yourself. The power fed into the house is capped at 900 watts by default in France. To go beyond (up to 2,400 watts), you’ll need a professional to verify your electrical installation.
Also note the presence of an Off-grid power outlet that can both power a nearby electrical device daily and serve as a backup in case of a power outage. Zendure advertises a 15-millisecond switchover for devices connected to this emergency outlet.
Another notable feature of this version is the ability to connect the solar panels directly, without needing a separate micro-inverter between them. Its four independent MPPT inputs (via standard MC4 connectors) accept up to 3,000 watts of solar power and enable optimization when panels have different exposures.
That is precisely what differentiates it from the SolarFlow 2400 AC+, which is more suited for installations that already have an inverter, and which three of our readers tested this summer.
My test configuration is much more modest, with two bifacial panels totaling 900 Wc on their forward face. Their special feature is also to capture some light reflected from the rear, though the gain strongly depends on the environment.
The connection went smoothly. Once the battery was connected to the solar panels, it was simply a matter of plugging it into a regular outlet, through which it could inject the stored energy into the home’s electrical grid. Pairing with the Zendure app and connecting to Wi‑Fi was just as straightforward. Within minutes, the whole setup was recognized and ready to operate.
There is also an RS485 RJ45-style connection to link the battery wirelessly or wired to a smart meter with no latency (handy when starting the oven). The possibility to integrate the battery into Home Assistant via MQTT is another asset for those who want to keep control of home automation and consumption data.
My only gripe so far concerns the documentation. A proper, more detailed and educational paper manual would be welcome, especially for a large portion of users who are new to this kind of product.
My first days were mostly spent understanding how to optimize my electricity contract. With my Engie subscription, I couldn’t automatically retrieve peak and off-peak periods. I had to manually enter the schedules and rates.
That manual step isn’t difficult, but the app has a small limitation that’s a bit annoying. The time slots can only be adjusted in 15-minute increments, whereas my contract shows much more precise times.
This straightforward approach is a genuine argument in its favor. As long as you have a proper installation and follow the manufacturer’s guidelines, you can activate the system yourself. The power fed into the house remains limited to 900 watts by default in France. To go beyond (up to 2,400 watts), you’ll need a professional to verify your electrical installation.
Also note the presence of an Off-grid power outlet that can power a nearby device daily and also serve as a rescue in case of a power outage. Zendure claims a 15-millisecond switchover for devices connected to this emergency outlet.
The system relies primarily on Zenki, Zendure’s artificial intelligence, to optimize storage and delivery of electricity by taking into account tariffs, weather forecasts and household consumption. We did not attempt to measure the gains from the algorithm separately from the battery’s more traditional modes, but its integration with the company’s smart meter proved especially convincing (see below).
The app also offers an Auto mode, which balances solar production, household consumption and storage based on the current situation with few adjustments to make. The Autoconsumption mode prioritizes electricity produced by the panels, used to power the house, and stored when it exceeds immediate needs.
The TOU mode, Time of Use, seeks to take advantage of tariff differences by prioritizing charging when electricity is cheaper and discharging when it becomes more expensive. It allows you to adjust price thresholds and the battery level to preserve. In my view, Zenki AI seems like the most relevant choice for those who want to enjoy the system without fussing over fine-tuning.
The system also includes an RS485-friendly connection to add a degree of resilience in case of a power outage or to monitor energy flows in real time. This coupling makes it possible to monitor consumption on the fly and enables a direct interface with the energy meter.
Another potential drawback is the documentation. A thorough manual would have been welcome, especially for new users exploring this kind of product.
It’s probably the Smart Meter 3CT that lets SolarFlow 2400 Pro show its true potential. This meter measures home electricity usage in real time and transmits the information to the battery, which then automatically adjusts the power it delivers.
142,80 €
When household consumption increases, the system raises its contribution within its capabilities. Conversely, it reduces the power injected when needs fall.
Without this accessory, you’re left with a rather approximate scheduling. For example, you can ask the battery to provide 300 watts continuously, but this instruction quickly becomes unsuitable when the home’s real consumption drops to 100 watts. The meter prevents these mismatches and helps you better utilize stored energy.
The certification IP65 protects against dust and splashes, but certainly not against overheating. That’s why Zendure recommends installation in the shade, in a well-ventilated, sheltered spot all day long, which isn’t easy to find. A small open shelter could suffice, as long as you don’t lock the battery in a space where heat can build up.
We would particularly have liked internal temperature readouts directly in the app. When equipment shuts down due to high heat, that information would be extremely useful to anticipate such issues. Fortunately, this model also features a pressure relief valve to vent excess pressure. Zendure also advertises an aerosol fire-extinguishing device designed to limit a fire’s spread in case of a serious anomaly.
Three months after installation, the Zendure SolarFlow 2400 Pro battery impressed me with its efficiency and ease of use. Its meticulous construction, the simplicity of connecting solar panels, and its daily operation make it a particularly pleasant piece of equipment to use.
Pairing with a smart meter truly changes the game. When everything is correctly configured, the battery handles energy exchanges without constant intervention and adapts power to the house’s needs. This is exactly what I expected from a home energy storage system.
That said, nothing is perfect. The blockages observed during the hottest parts of this summer, the lack of internal temperature readouts in the app, and some unnecessarily complex commands show that Zendure still has room for improvement.
As solar electricity buy-back rates fall, storing your production rather than selling it becomes increasingly appealing. However, the system’s profitability will also depend on the size of your photovoltaic installation, the sun exposure in your region, your consumption habits, and any required renovations. A case-by-case calculation is necessary before taking the plunge.
Daniel Brooks
I cover everyday products with a practical eye, from kitchen tools and home essentials to smart gadgets and consumer trends. My goal is to help readers understand what is genuinely useful, what is worth the price, and what deserves a second look before buying.