A Tesla ~110kWh battery may be coming that shows a path far beyond 400 miles of range--for the Model S at least. Noted Tesla hacker and parts reseller Jason Hughes recently tinkered with Tesla’s Battery Management System (BMS) firmware and found some data about a new battery pack configuration for the Model S, 3, and X.

Spent a little time RE'ing some recent Tesla BMS firmware.

Some variables were tweaked to fit 108 cell groups (~450V pack).

There is a packID that starts life set to ~109 kWh usable (400+ miles).

Bunch of other tweaks suggest prep for new S/X/3 pack configs at some point. 🔋

— Jason Hughes (@wk057) February 19, 2020

Based on the updates to Tesla’s BMS firmware, Hughes speculated that the EV automaker was prepping the new Models S, 3, and X for new battery pack configurations “at some point.” Given that Tesla is continuously trying to improve its battery setup, Hughes’ speculation seems plausible.

According to the Tesla hacker’s tweet, there were some variables tweaked in Tesla’s BMS firmware to fit 108 cell groups (~450V pack). He also discovered a packID with a start life set to ~109kWh usable or 400+ miles. Hughes estimated that a ~109 kWh usable battery roughly translated to a ~113-114 kWh pack.

All S/X cars made in recent months have actually been above stated EPA range. Will be unlocked soon for free via software update.

— Elon Musk (@elonmusk) February 15, 2020

Recently, Tesla’s Model S webpage was updated to read that the company’s premium sedan had an estimated EPA range of 390 miles per charge. Tesla fans were ecstatic about the news and wondered if Elon Musk’s 400-mile goal was already checked off. However, the 390-mile Model S more likely meant that Tesla finally updated its website with more recent, up-to-date values.

Following the webpage update, Elon Musk dropped a Tweet, saying: “Tesla Model S estimated EPA range is now above 390 miles or ~630 km.”

Musk added all Model S and X vehicles built in the past months were already well above their previously stated EPA range. A software update would unlock the extra range soon Tesla’s CEO said.

Software just thinks the car is less efficient than it actually is

— Elon Musk (@elonmusk) February 15, 2020

Musk explained that gradual hardware improvements throughout the Models S and X were introduced over the past several months to achieve an EPA range above 390 miles.

He also shared that improvements in the wheels and tires could make a 400-mile vehicle possible, which indicates that a whole new battery pack might be needed to reach that goal. So, if Tesla is prepping the next-gen Model S, 3, and X with new battery packs, it may already be thinking past 400-miles. 

Maybe possible with improved wheels/tires (which would be available to all previously made cars)

— Elon Musk (@elonmusk) February 15, 2020

It wouldn’t be uncharacteristic of Tesla or Elon Musk to already be thinking of the next milestone so soon. The people behind Tesla are used to constant innovation and always seem to think of ways to push the envelope. With the production of the Tesla Semi and Cybertruck nearing, the EV tech company may already be finding ways to improve its battery packs, starting with its already tried-and-tested vehicles.

Featured Image Credit: Tesla