Whole home battery backups have gained popularity as homeowners seek energy
independence and protection against power outages. These systems can power your entire
home during blackouts and even help reduce electricity bills by storing energy from solar panels
or charging during off-peak hours. Here’s a look at some of the best whole home battery backup
systems available.
1. Tesla Powerwall+
Capacity: 13.5 kWh
Continuous Power: 5.8 kW
Peak Power: 10 kW (for 10 seconds)
The Tesla Powerwall+ is one of the most well-known home battery systems, offering a sleek
design and impressive performance.
Pros:
Integrated inverter and system controller
Outdoor rated (no separate enclosure needed)
Scalable (up to 10 Powerwalls per system)
Smart energy management via mobile app
Cons:
Can be expensive, especially for multi-unit installations
Long wait times due to high demand
2. LG Chem RESU Prime
Capacity: 16 kWh
Continuous Power: 7 kW
Peak Power: 11 kW (for 3 seconds)
LG’s RESU Prime series offers high capacity and power output in a compact form factor.
Pros:
High energy density
Modular design (stackable up to 32 kWh)
Compatible with various inverter brands
10-year warranty
Cons:
Requires separate inverter
Indoor installation only
3. Generac PWRcell
Capacity: 9-36 kWh (modular)
Continuous Power: Up to 11 kW
Peak Power: Up to 16 kW
The Generac PWRcell offers a highly scalable solution with its modular design.
Pros:
Highly scalable (3 cabinet sizes, 2-6 battery modules each)
High power output
Outdoor rated
Integrates well with Generac generators
Cons:
Requires professional installation
Can be complex to set up due to modularity
4. Enphase Encharge
Capacity: 3.36 kWh per unit (scalable)
Continuous Power: 1.28 kW per unit
Peak Power: 1.92 kW per unit
Enphase’s microinverter technology translates well to their battery system, offering a highly
reliable and scalable solution.
Pros:
Modular and easily scalable
Each unit has its own microinverter for enhanced reliability
Outdoor rated
Integrates seamlessly with Enphase solar systems
Cons:
Lower power output per unit compared to some competitors
Can be expensive for larger systems
5. sonnen eco
Capacity: 5-20 kWh
Continuous Power: 3-8 kW (model dependent)
The sonnen eco is known for its long lifespan and smart energy management capabilities.
Pros:
Long cycle life (10,000 cycles)
Smart energy management
Sleek design
All-in-one system (inverter included)
Cons:
Higher price point
Indoor installation only
Conclusion
Choosing the right whole home battery backup system depends on your specific needs, budget,
and existing solar setup (if any). The Tesla Powerwall+ offers a great all-around solution with its
integrated design and smart features. For those needing higher capacity, the LG Chem RESU
Prime or Generac PWRcell might be better options. The Enphase Encharge system shines in its
modularity and reliability, while the sonnen eco stands out for its longevity and smart energy
management.
Consider factors such as:
Your average daily energy consumption
Critical loads you need to power during an outage
Whether you have or plan to install solar panels
Available installation space (indoor vs. outdoor)
Local climate conditions
Budget constraints
It’s also crucial to work with a certified installer who can properly size and install the system for
your specific home and needs. With the right whole home battery backup, you can enjoy energy
independence, lower electricity bills, and peace of mind during power outages.