SMA Home Storage Achieves 92.8% SPI, Setting New Benchmark for Residential Energy Systems

The SMA Home Storage Solution has emerged as one of the most efficient residential energy storage systems on the market. In the latest energy storage inspection conducted by Berlin University of Applied Sciences (HTW), the SMA system in the up-to-5 kW power class achieved a remarkable System Performance Index (SPI) of 92.8%. This result sets a new benchmark for hybrid inverters (DC-coupled systems) in this category, marking the highest SPI ever recorded. HTW Berlin’s storage inspection is regarded as one of the most reputable independent evaluations for residential PV storage efficiency across Germany, Austria, and Switzerland. The assessment replicates real-world conditions to gauge how well systems perform in everyday use.

“SMA not only delivers innovative technologies but also provides complete solutions that are perfectly harmonized to deliver measurably more energy,” said Marcus Spickermann, Executive Vice President of the Home & Business Solutions division at SMA. “Our users benefit directly—through greater energy independence and maximum efficiency. It’s fantastic to see this officially confirmed. We’re absolutely thrilled and highly motivated by this top result for our Home Storage Solution in HTW Berlin’s renowned energy storage inspection.”

The SMA Home Storage Solution combines the Sunny Boy Smart Energy 5.0 hybrid inverter, a 6.5 kWh lithium-ion SMA Home Storage Battery, and the SMA Energy Meter. This integrated setup not only delivers industry-leading efficiency but is now featured in the Stromspeicher-Inspektor web app for consumer guidance. Designed for flexibility, the hybrid inverter’s wide input voltage range and three MPPT trackers suit complex rooftop installations. Advanced silicon carbide technology and patented electronics components enhance performance and durability. The modular battery system offers low standby losses and easy scalability to meet household energy demands. Meanwhile, the SMA Energy Meter’s high-speed monitoring ensures precise, low-loss control between solar generation, battery storage, and home energy usage—even enabling backup power during outages when paired with the SMA Backup Solution.