Tesla unveils 20 MWh Megablock BESS
A new integrated solution combines Megapacks, transformer, and switchgear, cutting costs and speeding up installation for large-scale storage.
Tesla / Image credit: JHVEPhoto / Shutterstock.com
USA, Nevada, Las Vegas: Tesla has introduced its new integrated battery energy storage system (BESS), the Megablock, at an event in Las Vegas on 8 September. The launch took place alongside the RE+ clean energy trade show, with the company streaming the unveiling live on its X account.
The Megablock combines four Tesla Megapacks, a transformer, and switchgear into a pre-engineered 20 MWh system. Tesla says it offers a 25-year lifespan, 91 % round-trip efficiency at medium voltage, and a site-level density of 248 MWh AC per 4,046 m2 (one acre), including all required clearances.
The company highlights that the Megablock reduces installation times by 23 % and lowers construction costs by up to 40 %. Deliveries are scheduled to begin in the second half of 2026.
The system makes use of Tesla’s newly announced Megapack 3, which has been upgraded from 3.9 MWh to 5 MWh capacity in a 8.5-m (28-ft) unit. Megapack 3 includes a new inverter and fire protection system, as well as a simplified thermal bay with 78 % fewer connections.
Tesla also confirmed that cell supply will come from the US, Southeast Asia, and China, with 50 GWh of annual output expected from Houston.
CEO Elon Musk recently said that Megapack capacity is expanding quickly. With the launch of Megablock, Tesla appears set to strengthen its position in large-scale energy storage solutions.
Source: Energy Storage News
#BESS#clean energy#Elon Musk#energy storage#Las Vegas#Megablock#Megapack#Tesla