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SMA Home Storage 6.5 kWh High-Voltage Battery System (3× HS-BM-3.28-10) for Homes and SME
The SMA Home Storage 6.5kWh is a high-voltage modular battery system designed for modern residential and light commercial hybrid PV installations. Built around two HS-BM-3.28-10 battery modules, the system delivers scalable, efficient energy storage optimized for SMA hybrid inverter platforms.
Developed as part of SMA’s integrated energy storage ecosystem, Home Storage enables reliable self-consumption optimisation, grid independence, and future-ready energy management. The system is engineered for long service life, stable performance, and installer-friendly deployment.
System Architecture and Design Concept
High-Voltage Modular 6.5kWh Battery System
The 6.5kWh SMA Home Storage uses a high-voltage battery DC architecture, reducing current flow and improving overall system efficiency compared to low-voltage battery solutions. High-voltage operation minimises conversion losses and enables compact cabling and clean system layouts.
The 6.5 kWh configuration consists of:
2× HS-BM-3.28-10 battery modules
Central system control and communication
Unified battery stack operation
This configuration is suitable for households with higher energy demand, electric heating support, or increased evening and night-time consumption.
Battery Technology and Longevity
Lithium Iron Phosphate (LFP) Cells
The 6.5kWh SMA Home Storage uses Lithium Iron Phosphate (LFP) battery chemistry, chosen for its safety, thermal stability, and long operational lifespan. LFP cells are particularly suited for stationary storage systems with frequent daily cycling.
Key characteristics:
High resistance to thermal stress
Stable voltage behaviour
Long service life under continuous operation
This makes the system a reliable long-term investment for residential energy storage.
Energy Efficiency and System Performance
DC-Coupled Operation
The battery system operates DC-coupled with compatible SMA hybrid inverters. Solar energy is stored directly without unnecessary AC conversion steps, increasing round-trip efficiency and improving overall system yield.
Optimised Charge and Discharge Behaviour
The system supports fast and controlled charging and discharging, allowing it to capture short production peaks and supply household loads efficiently during low-production periods.
Integration with SMA Hybrid Inverters
Seamless SMA Ecosystem Compatibility
The 6.5kWh SMA Home Storage is designed to integrate natively with SMA hybrid inverter platforms, ensuring coordinated energy flow between PV generation, battery storage, and household loads.
The tight system integration allows:
Accurate state-of-charge control
Optimised self-consumption
Reliable backup-ready operation (depending on inverter configuration)
Installation and Scalability of the 6.5 kWh solar battery
Installer-Friendly System Design
The modular battery stack simplifies transport, handling, and installation. Electrical and mechanical interfaces are standardised, reducing installation errors and commissioning time.
Scalable Storage Concept
While this product represents a 6.5 kWh configuration, SMA Home Storage systems can be scaled by selecting different module counts, allowing installers to tailor capacity to customer demand.
Monitoring, Control and Energy Management
SMA Energy Management Integration
Battery operation and system performance are monitored and controlled through SMA energy management platforms, providing real-time insights into:
Battery state of charge
Power flows
PV production
Household consumption
Monitoring is available via web interface and mobile applications.
Environmental and Operating Conditions
The 6.5 kWh SMA Home Storage system is designed for indoor installation and reliable operation under residential conditions.
Designed for stationary indoor use
Engineered for long-term daily cycling
Robust housing and electronics for stable operation
Typical Applications
Residential hybrid PV systems
Self-consumption optimisation
Energy cost reduction
Backup-ready home energy storage
Homes with electric heating, EV charging, or higher consumption profiles
The SMA Home Storage 6.5 kWh system delivers a robust, high-voltage storage solution for SMA-based hybrid PV installations. Its modular architecture, LFP battery chemistry, and seamless inverter integration make it a strong choice for long-term residential energy storage projects.
For installers and EPCs, it offers:
Predictable system behaviour
Reduced integration risk
Strong manufacturer ecosystem support
Scalable storage design
Key Features for Installers
6.5 kWh usable storage capacity
2× HS-BM-3.28-10 high-voltage battery modules
High-voltage DC battery architecture
Lithium Iron Phosphate (LFP) cell technology
Optimised for SMA hybrid PV systems
DC-coupled storage for high efficiency
Modular and scalable system design
Suitable for self-consumption optimisation
Reliable long-term residential storage solution
You need a SMA inverter for your solar panel system in your home? Check out our SMA Inverters or hybrid inverters. Read more about SMA energy storage our solar blog or sign in to one of our SMA webinars or visit our 3Buy Solar Youtube Channel for more; or alternatively check the SMA Technology AG – Manufacturers Website.
Product Datasheet and Downloads
FAQ – SMA Home Storage 6.5 kWh
The system consists of two HS-BM-3.28-10 battery modules forming a complete 6.5 kWh high-voltage battery system designed for SMA hybrid PV installations.
Watch our solar trainings and webinars or visit you 3Buy Youtube Channel. … or alternatively you can browse for our latest articles regarding renewable and energy efficient heating and cooling in our Solar Distributor Blog.
Have you checked all our products? Go to our Solar PV and Energy Storage Shop | 3Buy Installer-Grade & DIY EU
No. SMA Home Storage is designed to operate exclusively with compatible SMA hybrid inverters. It cannot be used as a standalone battery system without an inverter.
The system uses Lithium Iron Phosphate (LFP) battery cells, offering high safety, thermal stability, and long cycle life suitable for daily residential energy storage.
Yes. The system is designed specifically to store surplus PV energy and release it during periods of higher household demand, increasing self-consumption and reducing grid dependency.
Backup capability depends on the SMA hybrid inverter configuration and additional components. The battery itself is backup-ready but requires proper system design.
SMA Home Storage systems are modular. Expansion options depend on the inverter platform and SMA system limits. Installers should follow SMA documentation for supported configurations.
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