As autumn arrives, it marks a crucial moment for homes with solar panels. The reduced sunlight and rising need for heating bring the issue of self-consumption back into focus: how to best use solar energy before the colder months set in. In France, the practice of selling surplus solar electricity has long been a way for individuals to earn extra income. However, the prices paid for this surplus have steadily declined. Today, households can earn only about one cent per kilowatt-hour from selling excess solar electricity, which is much lower than the cost of buying electricity from the grid. This difference makes using solar power directly at home more financially rewarding than selling it. As a result, home batteries have become essential for maximizing solar use. These batteries store energy collected during the day for use in the evening, when household energy needs typically rise. From September 16 to October 8, 2026, Zendure, a company in the residential solar storage market, is offering discounts on various models from its SolarFlow range. Prices vary by model, ranging from 719 euros to 959 euros: - SolarFlow 2400 Pro at 959 euros - SolarFlow 2400 AC+ at 839 euros - SolarFlow 1600 AC+ with an additional AB2000L battery at 959 euros - SolarFlow 800 Plus with two 500 W solar panels at 719 euros Additionally, during the promotion, a power strip can be added for just 1 euro when purchasing a SolarFlow 1600 AC+. These models cater to a wide range of needs, from small balcony solar setups to more extensive residential systems. The SolarFlow 2400 Pro is notable for its high solar capture capacity, with up to 3,000 W of PV power spread across four independent MPPTs of 750 W each. This design is especially useful for installations where solar panels are not uniformly oriented or may be partially shaded at different times of the day. The SolarFlow 2400 AC+ is aimed at households that already have a photovoltaic system connected to alternating current. As an AC coupling solution, it accepts up to 3,200 W in input and delivers up to 2,400 W in discharge, allowing for added storage without altering the existing setup. The SolarFlow 1600 AC+ follows a similar approach but in a more compact form, offering bidirectional power up to 1,600 W and a battery capacity that can be expanded based on needs. The SolarFlow 800 Plus is the entry-level model for balcony solar systems. It features an 800 W inverter, an integrated 1.92 kWh battery, and a solar input that can go up to 1,500 W. Its particularly low starting voltage (14 V) allows it to generate electricity even in low light, which is an advantage as the darker months approach. The technical details of the models are as follows: | Model | Solar Input Power | AC Network Input Power | Output Power on the Network (AC) | Battery Capacity | |-------------------|-------------------|------------------------|----------------------------------|------------------| | SolarFlow 2400 Pro | 4,800 W (4 MPPT × 750 W + 1,800 W via AC coupling) | 2,400 W | 2,400 W | 2.4 to 16.8 kW | | SolarFlow 2400 AC+ | 3,200 W (in AC coupling) | 2,400 W | 2,400 W | 2.4 to 16.8 kWh | | SolarFlow 1600 AC+ | 1,600 W (in AC coupling) | 1,600 W | 1,600 W | 1.92 to 11.52 kWh | | SolarFlow 800 Plus | 1,500 W (2 MPPT × 750 W) | 1,000 W | 800 W | 1.92 to 11.52 kWh | Whether starting from an existing installation or beginning a new balcony solar project, this time of year is ideal for evaluating storage needs before solar production declines and household electricity use increases. Zendure’s promotional period, which ends on October 8, 2026, provides a real opportunity to compare the available options based on the specific configuration of each home.