Renault Develops Energy Storage From Used Batteries With Connected Energy

1 year ago by Mark Kane 7

2016 -Connected Energy Ltd E-Stor diagram

2016 -Connected Energy Ltd E-Stor diagram (makes us a bit sleepy we confess)

2016 -Connected Energy Ltd E-Stor and Renault ZOE

2016 -Connected Energy Ltd E-Stor and Renault ZOE

Renault established an important partnership with Connected Energy, who from July 2016 will offer in the UK the E-STOR (not to be confused with EEStor) energy storage systems with reused Renault EV lithium-ion batteries.

“At the end of their useful in-vehicle life, Renault EV batteries still have considerable remaining capacity, which means that they can continue to give great service in other applications before they are ultimately recycled.”

The Connected Energy site lists for now two versions, but the prices remain unknown:

  • E-STOR 50 (50kWh/50kW)
  • E-STOR 100 (100kWh/100kW)

It’s important to note that typically Renault is selling electric cars without batteries, because batteries are rented to end-customers with warranty of at least 70% capacity. Renault owns the  batteries and as the capacity fades in older models, energy storage is way to go.

“Through its award-winning E-STOR technology, Connected Energy is offering a highly innovative solution to this conundrum through use of ‘second life’ EV batteries.
This can be used, for example, to store energy generated from on-site renewable generation resources such as solar panels and wind turbines, and then release it as it’s needed at a later time. The system also allows the batteries to be charged via low-cost off-peak electricity tariffs, enabling users to reduce their energy costs.

The batteries used are Renault EV batteries, chosen by Connected Energy because Renault, as EV market leader with 23,000 units sold in Europe in 2015, has expertise in the technology, its lifecycle and impact on the environment.

The first E-STOR product is nominally rated at 50kW/50kWhr which could typically be used to support one rapid charger or a cluster of fast chargers but the system is fully scalable and higher capacity units will follow.

In practical terms, as well as allowing more efficient use of energy, the system can also enable installation of rapid electric vehicle charging in sites where electricity supply would traditionally only allow slower rates. Instead of charging vehicles via a high-capacity supply directly from the grid, E-STOR allows multiple batteries to be charged at a slower rate over a period of time, ready to release their energy and charge a car when an EV driver needs it.

Renault offers two concrete solutions with its electric vehicles and their batteries through E-STOR. First to the grid, by providing energy storage that prevents power grid overload and balances supply and demand. Second to the environment, because batteries not fitted for automobile use, but that still have considerable remaining capacity, can have a longer life and lower carbon footprint before they are actually recycled.

In June 2015, E-STOR was named winner of the innovation category in the prestigious British Renewable Energy Awards 2015, hosted by the Renewable Energy Association.”

Matthew Lumsden, Managing Director, Connected Energy, said:

“E-STOR will enable the more cost-effective roll-out of electric vehicles in commercial and industrial settings, thus increasing the overall sustainability of this clean form of transport.    With Renault we have secured the supply of second life batteries for future E-STOR installations.”

Eric Feunteun, Electric Vehicle Program Director, Renault, commented:

“The second life application of Renault electric vehicle batteries supports Renault’s commitment to the energy transition in the automotive industry. Through E-STOR, EV owners can charge their car at reduced costs with electricity that is less carbon-dependent. It makes driving an EV a smart and even more sustainable transportation solution. With this energy management technology, EVs and their batteries become an asset for the grid rather than create overload.”

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7 responses to "Renault Develops Energy Storage From Used Batteries With Connected Energy"

  1. super390 says:

    Finally, a direct link between home storage and used car batteries. Now let’s see the price.

  2. zoe-driver says:

    The warranty ist 75% not 70% when renting the battery. Its 25,9 KWh in capacity from which 22 kWh are accessible (85%). So it must be replaced when having 19,5 kWh accesible, which is very fair.

    1. dexter says:

      Yeah, that would be more than fair 😀 but you really should expect the 75% warranty to be applied to either usable OR overall capacity.

  3. SJC says:

    Nissan could do the same, provide fast charging for LEAF.

  4. RalphE says:

    I think the important news here is use of the package to enable rapid/fast charging in places the local grid is not sufficient (no 440/480V available). Plug the package into 110/220V, and over time store enough power to provide 400V DC rapid charging up to 50/100kW. (Or 2 220V AC fast chargers.) This is a great idea.

  5. SJC says:

    It IS a great idea, I was told by someone on GreenCar that you could NOT do battery to battery. Of course you can with inverters and regulators.

  6. Heisenberght says:

    Renault should at least make it possible to buy a twizy with the battery. I really hate that I can’t buy it. No way I pay battery rent. They could sell much more but they prefer not to.