For utility-scale applications, Tesla Megapack 2 XL 4-Hour C012 is a containerized battery energy storage system supplied as an AC block. It stores 4.3 MWh of nominal energy for about a 4-hour duration. It uses liquid cooling and reaches 91.9% AC round-trip efficiency.
Use Cases
The specifications of Tesla Megapack 2 XL 4-Hour C012 together point to use in front of the meter. Its nominal energy places it in the utility-scale size class. Its supported protocols include DNP3, used in utility control systems.
Capabilities
For Tesla Megapack 2 XL 4-Hour C012, the specifications suggest energy shifting, storing charge and releasing it hours later. Its shortest listed configuration is 4 h, which makes Tesla Megapack 2 XL 4-Hour C012 a candidate for capacity value, counting as firm supply toward a network's peak needs. Its AC block includes the inverter, which points to renewable colocation, operating alongside a wind or solar plant on one site.
Nominal energy
4.3MWh
Rated AC power
1.08MW
Duration
4flexible
C / P rate
0.25C
Round-trip efficiency (AC)
91.9 %AC
What does this system typically cost?
BESSBASE.com user price estimates for Megapack 2 XL 4-Hour C012 by Tesla and similar storage systems. The ranges are LDP (Landed Duty Paid) prices per kWh that cover all expenses of delivering the goods to the buyer's premises, including production, shipping, sales margins, and import duties.
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Energy & Power
Architecture
DC Side
AC Side
Physical & Footprint
Battery Cells
Lifespan
Protection
Full Specification Sheet
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Plant Round-Trip Efficiency
The calculator estimates the full "plant" round-trip efficiency (RTE) at the point of interconnection. Some values are pre-blocked depending on information on a particular ESS. The rows that are marked "each way" are one-way efficiencies; they are applied on charge and again on discharge. We then square them. To enter a bundled PCS efficiency value, use its rated-power value, not peak. If the PCS skid already includes the LV/MV transformer, set Transformer LV/MV to 100 % so those losses are not counted twice.
Site Space Required
Shared: one 3 m aisle serves both neighbours. Dedicated: each unit keeps its own 3 m, so gaps double to 6 m.
Single unit — matches the stored area_sqm convention.
More Tesla Systems
8| Compare | Logo | Vendor | System | Energy | Power | Duration | Battery Cell | Open |
|---|---|---|---|---|---|---|---|---|
| Tesla | Megapack 3DC Block | 5MWh | 2.5MWAC | 1–8hflex | LFP | |||
| Tesla | Megapack 2 XL 4-Hour C012AC Block | 4.3MWh | 1.08MWAC | 4h0.25C · flex | — | |||
| Tesla | Megapack 2 XLDC Block | 4.3MWh | 1.9MWAC | 2–4hflex | LFP | |||
| Tesla | Megapack 2 XL 4-Hour C010 / C011AC Block | 3.92MWh | 0.98MWAC | 4h0.25C · flex | — | |||
| Tesla | Megapack 2 XL 2-Hour C010 / C011AC Block · cabinet | 3.85MWh | 1.93MWAC | 2hflex | — | |||
| Tesla | Megapack 2 (4-Hour)AC Block | 3.09MWh | 0.77MWAC | 4h | LFP | |||
| Tesla | Megapack 2 (2-Hour CMA Only)AC Block | 2.92MWh | 1.46MWAC | 2h | LFP | |||
| Tesla | Megapack 2 (2-Hour)AC Block · cabinet | 2.6MWh | 1.3MWAC | 2–4hflex | — |
About the Vendor
Founded in 2003 and based in Austin, Texas, Tesla expanded from electric vehicles into battery energy storage with Megapack and Powerwall. It deployed 31.4 GWh in 2024 and 43.5 GWh in the 12 months through the third quarter of 2025, including a record 12.5 GWh in one quarter, which shows its BESS manufacturing scale for utility and project finance counterparties.
How to Read the Product Page
This profile of Megapack 2 XL 4-Hour C012 by Tesla is assembled exclusively from public data to support early-stage screening and requires additional due diligence.
Always confirm these terms and technical specifications directly with the vendor and project stakeholders. Reflect all agreed-upon details in the legal agreements before making any investment decisions.
