Device Comparison
myenergi libbi vs Tesla Powerwall 3 vs FranklinWH aPower 2
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At A Glance
Key fit signals before the full table
A quick pass over the most decision-shaping details for each device in this featured comparison.
myenergi libbi
Tesla Powerwall 3
- Nominal capacity
- 13.5 kWh
- Expansion
- System expansion available anytime; each Powerwall 3 Expansion adds 13.5 kWh, with up to 40.5 kWh max expansion per unit and up to 3 expansion units supported
- Warranty
- 10 years
- Price
- Installer supplied; usually quoted as a complete installed system
FranklinWH aPower 2
- Usable capacity
- 15 kWh
- Nominal capacity
- 15 kWh
- Chemistry
- Lithium iron phosphate (LFP)
- Charge/discharge
- 10 kW
| Install fit | |||
|---|---|---|---|
| Phase support | Single-phase 230 V systems in the reviewed core English source set | North American split-phase residential systems; regional variants differ | Residential whole-home backup system context via FranklinWH system components |
| Installation | Wall-mounted modular battery and hybrid inverter with a separate indoor controller | Integrated inverter home battery for wall- or floor-mounted indoor or outdoor installation | Wall- or floor-mounted indoor/outdoor AC-coupled battery installed as part of a FranklinWH aGate system |
| Measurement | Battery storage system with CT-based grid and load monitoring through the controller | Home battery storage system with integrated solar inverter, whole-home or partial-home backup support, and Tesla app monitoring | AC-coupled home battery with integrated inverter for storing solar, grid, generator, and EV-related household energy within the FranklinWH ecosystem |
| Max current | Unknown | 48 A | Unknown |
| Inverter fit | |||
| Backup support | Unknown | Unknown | Designed for whole-home backup within the FranklinWH system, with backup behavior coordinated through aGate and system design choices. |
| Battery fit | |||
| Nominal capacity | Unknown | 13.5 kWh | 15 kWh |
| Usable capacity | Unknown | Unknown | 15 kWh |
| Chemistry | Unknown | Unknown | Lithium iron phosphate (LFP) |
| Charge/discharge power | Unknown | Unknown | 10 kW |
| Warranty | Unknown | 10 years | 15 years |
| Expansion | Unknown | System expansion available anytime; each Powerwall 3 Expansion adds 13.5 kWh, with up to 40.5 kWh max expansion per unit and up to 3 expansion units supported | Supports parallel AC-coupled expansion up to 15 aPower batteries per aGate for 225 kWh total usable system energy |
| Monitoring | |||
| Protocol | Ethernet / Wi-Fi / RS485 / Proprietary 868/915 MHz / myenergi app | Tesla App / Wi-Fi / Ethernet / Cellular | FranklinWH App / aGate |
| Local API | No | Yes | No |
| Cloud dependency | myenergi app and cloud account are used for normal monitoring and control. | Tesla App and installer tools are central; local and third-party access varies by firmware and region. | Backup power can continue offline, but FranklinWH App remote monitoring and updates depend on internet-connected aGate service. |
| Home Assistant | No | Yes | No |
| Solar fit | |||
| Solar import/export | Yes | Yes | Yes |
| Buying context | |||
| Price range | Unknown | Installer supplied; usually quoted as a complete installed system | Unknown |
| Availability | UK / Europe | United States and Canada | United States / Canada official FranklinWH availability |
| Source check | |||
| Last verified | May 17, 2026 | May 19, 2026 | May 21, 2026 |
| Product page | Official page | Official page | Official page |
| Documentation | Official docs | Unknown | Official docs |