Compact 5-10kW Energy Storage Inverters Launch

Targeting Residential and Small Commercial Solar Markets

FRANKFURT, Germany – August 01, 2025 – A new line of high-efficiency energy storage inverters designed for residential and small commercial photovoltaic (PV) systems was unveiled today, offering a blend of compact design, flexible battery compatibility, and robust performance to meet the growing demand for affordable, scalable solar solutions. The series, which includes four models ranging from 5kW to 10kW nominal AC output, is engineered to simplify solar energy storage while delivering reliable power for homes, small businesses, and remote installations.

Industry-Leading Efficiency for Maximum Solar Harvest

At the core of the series is its impressive power conversion efficiency, with the top-tier 10kW model achieving a maximum PV-to-AC efficiency of 97.8%—one of the highest in its class—and a weighted efficiency (PVOUT) of 97.7% for consistent performance across varying loads. All models support a maximum PV input power of 15kW, with a wide maximum power point tracking (MPPT) voltage range of 160-950V, enabling compatibility with modern solar panel configurations. The 120V start-up voltage ensures the system begins operating even in low-light conditions, maximizing energy capture from dawn to dusk.

Each inverter features 1-2 MPPT trackers (depending on the model), with a maximum input current per tracker of 40A for the 10kW variant. This design optimizes energy harvest for partially shaded arrays, a common challenge in residential rooftop systems.

Flexible Battery Integration for Scalable Storage

A key differentiator is the series’ support for both lithium-ion and lead-acid batteries, catering to users with varying storage needs and budgets. The nominal battery voltage range of 250-600V (with a maximum of 600V) accommodates most modern battery systems, and charge/discharge currents are tailored to each model: the 5kW inverter offers 15kW charge/5.8kW discharge, while the 10kW model boosts discharge to 11.3kW. This flexibility makes the series suitable for everything from basic home backup to larger commercial applications requiring frequent cycling.

Reliable Output and Seamless Backup

On the AC side, the inverters deliver nominal power from 5kW to 10kW, with maximum output power (PF=1) reaching 11.7kW for the 10kW model. Peak apparent power (10-minute) goes up to 15kVA, ensuring the system can handle short bursts of high demand—perfect for powering appliances like air conditioners or electric vehicle chargers.

The inverters support a wide grid voltage range of 380/400/415V (3W+N+PE) and 50/60Hz frequency, with a power factor range of >0.99 leading/lagging—ensuring compatibility with most global grid standards. Total harmonic distortion (THD) is kept below 5%, meeting strict power quality requirements for residential and commercial applications.

The backup power (THDU) function is a standout feature: nominal output matches the main AC power, and peak apparent power (10-second) reaches 15kVA, providing reliable backup for critical loads during grid outages. The transfer time is less than 10ms, ensuring seamless switching without disrupting power—critical for businesses like cafes or medical clinics that can’t afford downtime.

Safety and Compliance at the Forefront

Safety is a top priority, with the series featuring Class I protection classification, anti-islanding protection to prevent backfeeding into the grid during outages, and a suite of overcurrent/overvoltage safeguards for both AC and DC circuits. Surge arresters (DC Type II, AC Type III) protect against voltage spikes, while insulation resistance detection ensures the system remains safe even in humid conditions (0-100% relative humidity). Optional GFCI (ground fault circuit interrupter) adds an extra layer of protection for residential users.

Compliance with international standards is rigorous: the series meets IEC/EN 62109-1/2 (safety for power converters), VDE 4105 (grid connection for PV systems), EN 50591 (energy storage systems), and several others, ensuring adherence to stringent grid codes in Europe and beyond.

Compact, Intelligent Design for Modern Lifestyles

The inverters’ compact form factor—measuring just 560mm×508mm×218.3mm and weighing 32kg—makes them easy to install on walls, even in tight spaces like garages or utility rooms. Natural cooling eliminates the need for noisy fans, ensuring quiet operation in homes, while the operating temperature range of -25℃ to 60℃ (with derating above 45℃) means they perform reliably in extreme climates.

User experience is enhanced by a intuitive interface: LED indicators provide quick status checks, an optional LCD display offers detailed monitoring, and a Bluetooth-connected mobile app allows remote control and energy tracking. Communication interfaces like RS485 (for battery management systems) and CAN are standard, with optional Wi-Fi/LAN available for connecting to smart grids or home automation platforms—enabling users to optimize their energy use and even sell excess power back to the grid (where allowed).

Industry Analyst Praises Versatility and Value

“The launch of this series couldn’t come at a better time,” said Dr. Elena Marquez, a senior analyst at Clean Energy Insights. “Residential and small commercial users are increasingly looking for solar storage solutions that are affordable, easy to install, and flexible enough to grow with their needs. This series checks all those boxes: its compact design fits in most homes, it supports both lithium-ion and lead-acid batteries, and the 10-year warranty option adds long-term value. The backup capabilities are particularly impressive—seamless switching and high peak power make it a reliable choice for critical loads.”

Warranty and Availability

The series comes with a standard 5-year warranty, with an optional 10-year extension available for users seeking long-term peace of mind. Shipments are expected to begin in Q4 2025, with the inverters available through authorized distributors globally. The manufacturer notes that output voltage and frequency can be adjusted to meet local grid codes, making the series suitable for use in multiple countries.

Looking Ahead

As solar energy becomes more mainstream, the demand for reliable, affordable storage solutions is growing. This new inverter series addresses that need with its combination of efficiency, flexibility, and compact design—making it a strong contender in the residential and small commercial markets. With its focus on user experience and safety, the series is poised to help more users take control of their energy use and reduce their reliance on the grid.