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.