2026 Home Battery Comparison
There is no single battery that is right for every home. The best system depends on your electrical loads, existing solar equipment, backup priorities, available installation space and budget. Here is how the four systems we install compare.
| Feature | Enphase IQ Battery 10C | Tesla Powerwall 3 | FranklinWH aPower 2 | Lunar Energy Battery System |
| Usable energy | 10 kWh | 13.5 kWh | 15 kWh | 15-30 kWh |
| Continuous output | 7.08 kW | Up to 11.5 kW | 10 kW | 9.6 kW |
| Short-duration / load start | Up to 90 LRA; 56 A for 3 seconds | Up to 185 LRA | 15 kW for 10 seconds | 15 kW for 5 seconds; 134 LRA |
| System architecture | AC-coupled with embedded grid-forming microinverters | Integrated solar inverter; can also be added to existing solar | AC-coupled battery managed through aGate | Integrated solar-and-battery system with hybrid inverter |
| Backup equipment | IQ Combiner 6C and IQ Meter Collar for backup | Gateway 3, Backup Switch or compatible Backup Gateway | FranklinWH aGate | Lunar Bridge or compatible meter-socket equipment |
| Expansion | Up to eight 10C units / 80 kWh | Up to four Powerwall 3 units plus three expansion units | Up to 15 units / 225 kWh per aGate | 15-30 kWh in one tower |
| Published warranty | 15 years or 6,000 cycles | 10 years | 15 years or 60 MWh throughput | 12.5 years |
| Often a strong fit for | Enphase systems, modular design and distributed power electronics | High output from one unit and integrated new-solar installations | Large single-battery capacity and flexible retrofits | Integrated solar, storage and circuit-level management |
| Whole-home backup potential | Yes, subject to system design | Yes, subject to system design | Yes, subject to system design | Yes, subject to system design |
Specifications can change through product updates, firmware, installation configuration and manufacturer revisions. Final system capabilities are established during Infinium’s design and engineering process.
FranklinWH aPower 2
The FranklinWH aPower 2 is a powerful, whole-home energy storage solution designed for flexibility and scalability. This system is well-suited for homeowners who want robust backup capacity and advanced energy management.
FranklinWH aPower 2 supports high power output, making it capable of running your entire home during an outage. When paired with solar, it allows homeowners to store and manage energy efficiently, adapting to changing usage patterns.
Enphase IQ Battery System
The Enphase IQ Battery system is known for its modular design and seamless integration with Enphase solar systems. This approach allows homeowners to scale storage capacity over time as energy needs evolve.
Enphase IQ Batteries offer quiet operation, intelligent energy management, and reliable backup for critical loads. The system automatically responds during outages, keeping essential circuits powered without manual intervention. Enphase offers some of the better warranties around on their battery backup systems.
Tesla Powerwall Battery
The Tesla Powerwall is one of the most recognized home battery backup options available today. Its space-saving profile makes the Powerwall a top solution for those who need a lot of power storage in a small footprint.
Tesla Powerwall can store excess solar energy or charge from the grid, then deliver power during outages or peak-rate periods. Its automated operation ensures a smooth transition when the grid goes down, keeping your home powered without interruption.
Powerwall pairs an integrated solar inverter with high single-unit output, which means it can support larger simultaneous loads than many comparable batteries and can anchor a new solar design or be added to a qualifying existing system. Additional units and expansion units can be added later if your storage needs grow, and the Tesla app gives you visibility into production, consumption and backup reserve.
Lunar Energy Battery System
The Lunar System brings solar generation, battery storage, energy monitoring and circuit-level load control together on one platform. It delivers the largest single-tower storage capacity of the systems we install, which makes it a strong option for homeowners who want significant capacity without a wall of separate units.
What sets Lunar apart is smart circuit control. During an outage, the system can shed lower-priority loads automatically so that stored energy goes to the appliances that matter most, extending how long your essential systems keep running. Lunar is designed and tested in Mountain View, California.
