Sono Motors’ Sion gets better with a new LFP battery

Sono Motors Sion charging a Tesla Model S
Sono Motors Sion charging a Tesla Model S

The solar powered Sion just got its specs upgraded thanks to a new super-safe LFP (LiFePO4) battery with more capacity that provides more range and faster charging.


Let’s see the press release from Sono Motors.


  • The New 54 kWh LFP Battery Provides the Sion With an Extended Range of up to 305 km and a Maximum Charging Power of up to 75 kW
  • More Powerful Battery Eliminates Cobalt, Nickel and Manganese
  • In Surveys Over 90% Of Sion Reservation Holders Voted for a Larger Battery

Munich, 24 June 2021 – After consultation with its Community, Munich-based mobility provider Sono Motors has opted for a more powerful 54 kWh battery for use in the SEV (Solar Electric Vehicle) Sion. The new battery extends the vehicle’s total range by up to 305 km and its maximum charging power by up to 75 kW. The additional range provided by the Sion’s solar panels remains unchanged at a weekly average of 112 km (245 km per week at peak). The new LFP (lithium iron phosphate) battery is considered to be one of the safest on the market, and also completely dispenses with the use of cobalt, nickel and manganese.

“In our survey, more than 90% of our existing reservation holders voted for a more powerful battery,” said Laurin Hahn, CEO of Sono Motors. “This move is just another example of how Sono Motors is continuing to drive innovation and sustainability, whilst responding to the wishes of our Community throughout the development of the Sion. Boasting greater capacity, greater range, faster charging, enhanced safety features and no cobalt, nickel or manganese usage, this improved battery will strengthen the Sion’s unique market position even further,” Hahn continued.

Key benefits of the enhanced battery include:

  • Extended range of up to 305 km (previously 255 km)
  • No usage of cobalt, nickel and manganese
  • Built with safety in mind and is effectively non-flammable
  • New charging rate of up to 75 kW CCS (previously 50 kW)
  • Increased life span of up to 3,000 cycles, or up to 900,000 km


We can see what changed in the specs below.


Old advertised specifications

  • Price: 25.500 euros
  • Battery: 35 kWh
  • Drivetrain: 120 kW Motor
  • Torque: 270 Nm
  • Max. speed: 140 km/h
  • Charging: CCS: 30 Min. – Type 2: 3,5 h – Schuko: 13 h
  • Range: 255 km according to WLTP standard
  • Solar range: up to 245 km/week
  • Trunk volume: 650 L
  • Tow bar: 750 kg


New advertised specifications

  • Price: 25.500 euros
  • Battery: 54 kWh
  • Drivetrain: 120 kW Motor
  • Torque: 270 Nm
  • Max. speed: 140 km/h
  • Trunk volume: 650 L
  • Charging: CCS: 35 Min. – Type 2: 5 h – Schuko: 12,5 h
  • Range: 305 km
  • Solar Range: on average 112 km/week


Sion Motors Sion new LFP battery specs

Sion Motors Sion new LFP battery specs


The energy density of 150 Wh/kg for this LFP battery pack is alright for today’s standards. However, already next year Guoxuan expects to reach 260 Wh/kg at the cell level and 234 Wh/kg at the pack level with its LFP battery cells that have silicon anodes.

Unfortunately, the Sion doesn’t seem very efficient. With a 55 kWh battery the new Renault ZOE gets a WLTP range of 395 km.


Anyway, with startups we never know if they really intent to go into mass production or they are just advertising their new technology hoping to sell it to a big company.

After being delayed once again, mass production is now scheduled to begin in 2023. Sadly, every time its arrival gets delayed, the Sion concept becomes less desirable. Notice that the Renault 5 E-TECH is set to debut in 2023 with LFP batteries and a price below 20.000 euros…


What do you think? Will we ever see this electric car reach mass production?



More info:

Pedro Lima

My interest in electric transportation is mostly political. I’m tired of coups and wars for oil. My expectation is that the adoption of electric transportation will be a factor for peace and democracy all over the world.

7 Responses

  1. ALnair says:


  2. Earl Colby Pottinger says:

    I want to just buy the battery,

  3. Pajda says:

    New Sono Motors battery box desing looks like a copy of VW MEB 82 kWh battery box. The 35 kWh battery size for this class was a nonsense from the beginning. I do not believe that they can ever start MP and think that they still believe that some bigger vehicle manufacturer or financial group will buy their company.

  4. Jonas Jovial says:

    This car will never enter in production and i feel pity for those that put their money on this…

  5. antrik says:

    The idea that a niche model from a new startup could beat pricing of established mass manufacturers in the extremely volume-critical automotive market was completely delusional from the start.

    Ironically, if it finally enters production in 2023 (or even later), that price point might finally be somewhat realistic… Simply because such pricing won’t be anything special at that point.

    The question is whether enough people will stick with their orders — despite better alternatives becoming available — to actually go ahead with production… Assuming they can solve any other issues, that is.

    Most likely, they’d need a large additional financing round in order to actually start production — and I find it rather unlikely anyone will believe enough into their prospects to give them significant money… Especially given their previous reluctance to accept typical financing vehicles with the usual strings attached.

  6. Jonas says:

    Weight goes up from 1400 kg to 1730 kg according to the specs at Sono Motors. This means a completely different car. They won’t make it into production.
    They have not even a prototype with the new battery, they have just announced it.

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