| Feature | Tesla Megapack 2 XL | BYD MC Cube | Sungrow PowerTitan 2.0 | |---------|---------------------|-------------|------------------------| | Capacity (MWh) | 5.8 | 4.9 | 5.4 | | Round-trip efficiency | 92.5% | 90% | 91% | | Integrated inverter | Yes (SiC) | Optional | Yes (IGBT) | | Fire test standard | UL 9540A (modified) | UL 9540A | UL 9540A | | Software ecosystem | | Proprietary | Third-party | | Price per MWh (est.) | $310–$330 | $295–$315 | $305–$325 |
: A single unit stores up to 3.9 MWh of electricity.
The , and specifically the XL variant, represents the maturation of this technology. It is not merely an incremental update; it is a complete redesign focused on density, ease of installation, and thermal management. megapack 2 xl
The Megapack 2 XL is a pre-assembled, grid-scale battery energy storage system (BESS) designed for projects exceeding 100 MWh. Unlike the standard Megapack (which focuses on modularity) or the Megapack 2 (which introduced LFP chemistry and inverter integration), the variant prioritizes energy density per square foot and DC-coupled solar integration .
Fifty-two XL units installed near Houston, purpose-built for during hurricane-induced outages. The 2 XL’s new water-mist fire suppression system (non-toxic, no high-pressure cylinders) allowed the units to be stacked in a compact, non-barriered layout. ERCOT reports that the system can black-start a local substation without external power—a first for a pure-LFP system of this scale. | Feature | Tesla Megapack 2 XL |
Tesla’s closed-loop recycling facility in Nevada is now processing Megapack 2 XL packs. The company claims (lithium, iron, phosphate, copper, aluminum) are recoverable. For project owners, this means a residual value of $15–$20 per kWh at end-of-life (10–15 years), lowering net ownership cost.
The Megapack 2 XL changes this to a "plug-and-play" model. Because each unit holds so much energy, fewer units are required to hit a specific capacity target. The Megapack 2 XL is a pre-assembled, grid-scale
Tesla didn’t just enlarge a battery. They redesigned the system architecture to address three persistent industry pain points.
The is a utility-scale battery storage system designed for the world's largest energy projects. Each unit has an energy capacity of up to 3.9 MWh , enough to power approximately 3,000–4,000 homes for one hour.