Why a home battery with solar storage is becoming increasingly relevant
In April 2025, Spain and Portugal were hit by one of the largest power outages in Europe in the past twenty years. Millions of people were left without electricity for hours. Trains came to a standstill, payment systems failed and hospitals switched to emergency power. It took more than 10 hours before the grid was fully restored. Those who had a home battery with emergency power function at that time had a fundamentally different daily experience than the rest.
Could that happen in the rest of Europe too? You might think not, but there is a possibility. Europe has a strongly interconnected (emergency) power grid, but never say never. Energy uncertainty due to geopolitical crises and wars are driving up the prices of electricity and fuel. Various national and regional governments are distributing information booklets about emergency situations, crises and how the population should protect themselves against them. You can get through a period with candles and sufficient drinking water, but you might make your life more pleasant if you can also be energy-independent for a period.
⚡️ What should you do during a power cut?
A while ago our team wrote a comprehensive article about what you can do during a power cut. Discover all the tips we give here. 🔗 This is what you should do during a power cut
A home battery is more than an energy-saving investment in that picture. It is a concrete step towards less dependence on infrastructure that proves to be vulnerable. The Zendure SolarFlow 800 Pro 2 is a product that makes that step accessible, without needing a professional installer or a large budget.
The problem that many people don’t know about
Solar panels without a battery are useless during a power cut
Some homeowners think they can still generate and use electricity via their solar panels during a power cut, but this is often not the case. Most standard solar panels and plug-and-play solar panels automatically switch off during a power cut. This is a safety measure to prevent electricity being fed back into the grid. This can be dangerous for people working on the grid.
If you combine solar energy with a home battery with integrated emergency power function, you can continue. During a fault, a hybrid inverter detects the voltage drop and automatically switches to island mode. The dwelling is temporarily disconnected from the grid and the circuits connected to the backup circuit continue to be powered.
What can you realistically expect from emergency power?
Not everything, and that’s not necessary to be honest. Don’t (yet) expect a home battery to be able to power your entire house for days. You can keep things running such as:
- Fridge: lasts approximately 8 hours on a 1.2 kWh battery
- Lighting
- Wi-Fi/router
- Laptop/mobile charging
What is more difficult, because these products are too heavy:
- Induction hobs
- Electric heaters
🔌 Built-in emergency socket
During a power cut, a plug-in battery such as the Zendure SolarFlow 800 Pro 2 runs on the built-in emergency socket. You manually connect the essential appliances to it. Full home coverage requires a fixed installation with additional wiring and an automatic transfer switch — a more complex and expensive solution.
What is the Zendure SolarFlow 800 Pro 2?
An all-in-one system for balcony and garden
The Zendure SolarFlow 800 Pro is an inverter and home battery in one, equipped with a built-in LFP battery with a capacity of 2 kWh. The inverter has four connections for solar panels, an off-grid socket, and is expandable with up to five additional LFP batteries of 2 kWh each, so the system can grow with the household’s energy needs.
The Pro 2 is the successor to the SolarFlow 800 Pro and builds on exactly the same software base. The difference lies mainly in the hardware: Zendure has optimised the internal architecture and uses a new generation of Gallium Nitride (GaN) semiconductors, which provides better passive cooling. Efficiency improved by 3 per cent compared to the previous model.
The recommended price (April 2026) is around 786 euros, which works out at approximately 409 euros per kilowatt-hour. The charging power is 1,000 watts and the discharging power is 800 watts. With a completely empty battery, charging takes approximately 1.9 hours. The Zendure SolarFlow 800 Pro 2 also has an emergency power output with a continuous power of 1,440 watts and an IP65 certification, which makes it suitable for outdoor installation.
Four MPPT inputs: room for serious solar yield
Four MPPT inputs is relatively high for this type of system. Equipped with a 2,640-watt MPPT controller and a 1,000-watt bidirectional inverter, the SolarFlow 800 Pro stores excess solar energy during the day and supplies power to the house at night, reducing total energy costs.
🌞 Lots of solar energy possible
Concretely, this means you can connect up to four solar panels directly, without the intermediary of a separate micro-inverter. That is one of the things that makes this system technically more interesting than a standard plug-in battery. You can also connect smaller panels in parallel on one input.
The smart side: AI control and dynamic tariffs
ZENKI 2.0: energy management that thinks along
Using AI algorithms, the SolarFlow 800 Pro analyses your solar energy generation, consumption patterns, weather forecasts and fluctuations in electricity prices to dynamically adjust the daily charging and discharging schedules. It charges at lower tariffs during off-peak hours and can switch to battery power when necessary.
What is striking about the ZENKI AI energy management system is that it reacts quickly: turn on the kettle, and the battery immediately assists. When a cloud passes in front of the sun, the system smoothly switches between charging and discharging. This also happens relatively quickly, although you can never rule out some delay.
Expandability and safety
Stack up to 11.52 kWh
You can expand up to a maximum of 11.52 kWh, but note: not all Zendure batteries work together. There are older models that you cannot stack here. The AB3000X from the SolarFlow 2400 AC does not fit on the 800 Pro, for example. It is therefore wise to check this in advance if you already have Zendure equipment.
Safety and warranty
The Zendure SolarFlow 800 Pro 2 is equipped with a built-in aerosol fire suppression system and active battery heating, so that the system continues to function well even at low temperatures. Zendure provides a 10-year warranty. LFP technology (lithium iron phosphate) is the safest and most durable battery chemistry within home batteries, and that is applicable here.
IMPORTANT! The IP65 certification enables outdoor placement, but the waterproofing only applies when all connections are correctly closed. Consult the manual when installing in a damp or outdoor environment.
Taking stock
What works well
Installation is simple: connect, pair the app, done. After connecting to the socket with the supplied 230V cable, you can register the home battery directly via the Zendure App. Within 1 to 2 minutes, the home battery is operational. That is a threshold achievable for almost everyone.
The system is also modularly designed: you start with 1.92 kWh and scale up as demand grows. That makes the entry threshold realistic without committing yourself to a system that is too small.
What you need to take into account
The maximum charging and discharging power is 1,000 watts. If you want to charge faster or have more power, then this system is less suitable. For larger households with high peak consumption, the Pro 2 is more of a supplement than a complete energy solution.
In terms of performance, the Zendure SolarFlow 800 Pro positions itself at the level of various competitors. The Pro 2 is a solid choice in its class.
The app is in English, and Zendure’s customer service receives mixed reviews. If you are comfortable with setting up and troubleshooting independently via forums and YouTube, that is generally not a problem. For those who want to be completely looked after, a brand with strong Dutch support may be a better choice.
Conclusion
The Zendure SolarFlow 800 Pro 2 is a well-thought-out system for those who want to store their solar energy, reduce their energy bill and have a basic emergency power supply — without major investments or an installer. The combination of four MPPT inputs, AI control, expandable capacity and an integrated emergency socket makes it a versatile product for its price. It is not a complete solution for prolonged crisis situations, but it gives you considerably more autonomy than an ordinary mains connection. In a world where power cuts are becoming less exceptional, that is not an unnecessary luxury.
