By reusing an electric vehicle battery for a storage system we avoid

  • Unnecessary CO2 emissions:
    • Up to 110 kg per kWh for a new battery.
      Several additional tons of CO2 by using the battery to support renewable energy sources.
    • Depleting rare minerals (Cobalt, Lithium, Nickel, and Yttrium) through harmful extraction.
  • Up to 0,5 kg of Cobalt extraction per battery kWh.
  • Avoid the impact of lithium extraction on local water resources.

The future is electric.

By 2030, half of the vehicles sold in Europe will be electric and will need batteries to power them. At the same time, renewable energy sources will make up an increasing share of our electricity system. This increased demand will result in a need for batteries that are capable of efficiently storing power to smooth peak demands.

Battery production is energy and resource intensive. To meet the growing demands, we need to find solutions to make the battery life cycle more sustainable.

Electric car Li-ion battery (lithium-ion & NiMh or other technologies)  contains valuable raw materials such as Cobalt, Lithium and Nickel, some of which have to be extracted using invasive and damaging mining techniques and must be imported from faraway countries, therefore carrying a massive carbon footprint.

To put it simply, the stakes are higher than ever:

  • To produce a battery with  1 kWh of energy, 70 to 110kg of CO2-eq are emitted. This means that for a small electric vehicle with a 41 kWh battery emits up to 4,5 tons of CO2-eq.
  • To produce a typical Li-ion battery with 1 kWh requires approximately 0,5 kg of Cobalt, which are often mined in very poor labor conditions.
  • Batteries require large quantities of Nickel and Lithium, which are also rare resources that require highly invasive measures of extraction.

These impacts will continue to grow along with the development of the electric vehicle and stationary battery markets. EU-produced battery capacity is expected to jump from a mere dozen GWh today to several thousand GWh by 2049. This means that future battery production could be responsible for emitting hundreds of billions of tons of CO2 into the atmosphere and for depleting rare mineral resources like Cobalt within a single generation.

The capacity of electric car batteries decreases over time. After approximately 10 years, when batteries can no longer be used in a car, they can still be used for more than 10 years to store energy in Buildings. By using recycled electric car batteries for energy storage in buildings, we avoid having to produce a new battery, which is highly energy and resource-intensive. Furthermore, using these recycled electric car batteries can help support the use of renewable energy sources, such as solar or wind, which contribute to reducing CO2 emissions and the depletion of precious resources.

Engineering & optimization at your fingertips

Watt4Ever puts its know-how at your disposal to help you get the most out of your battery year round.

  • Energy stored from PV production in the summer months
  • Energy reserved for peak shaving (only in months when peaks are expected)
  • Energy stored for demand response services or stored at night to consume during peak hours.
  • Energy reserved at all times for power backup

Watt4Ever also monitors your battery’s health to ensure uninterrupted service and risk reduction.

Storage Solutions

Watt4Ever produces storage solutions that are safe, sustainable & efficient. Our engineering team will work directly with you to evaluate your storage needs and provide you with a custom-made battery solution.

Battery chemistry Differs from LiFeYPO4 to NMC to NCA, depending on product size / location / performance.
Battery housing Can be air / water tight or open frame
System housing Stand-alone container or built into an existing location. Smaller systems can be installed as a turnkey cabinet. Bigger systems need on-site assembling.
Battery capacity On demand, starting from 50kWh Safety certification IEC 62619
Battery DC voltage 48V-400V Dimensions On demand
Inverters Victron, Danfoss. Other inverters can be used on demand. Guarantee Up to 10 years
Battery C-rates 0,5C-1C Casing On demand

Typical business case for a W4E battery

With batteries, your applications are charged 24/7 through your RES production without needing to inject surplus energy.

This means lower energy prices and avoiding of prosumer charges.

With a Watt4Ever battery, you help your company generate greater revenue and savings.

With a Watt4Ever battery, you can take advantage of the free space in your battery during the year to boost revenue and lower costs. The added security of a Watt4Ever system means that you won’t need to install a generator and UPS to ensure constant energy flow. Our batteries are more reliable, which means less maintenance for you, and less pollution for the environment.




Technical References


Reference n°1: 30 kWh Stationary battery, Delhaize St-Rochus

Installed in March 2020, this system was built at Delhaize’s demand to serve as a UPS for its IT equipment as well as for peak-shaving purposes in one of its new stores in Kortrijk.

Delhaize is testing Watt4Ever’s innovative approach with the intention of testing & deploying it to more of its stores in the future.

Together with Delhaize, Watt4Ever is testing various innovative applications for the battery, combining applications such as backup with grid services and peak-shaving to maximize efficiency and performance.

Capacity 30kWh Inverter power output 24kVA
Chemistry LiFeYPO4 Safety certificates IEC 62619
Battery output voltage 48V Control Victron + ReVolta controllers


Reference n°2: 7,5kWh battery for Auto Salon, Febelauto

Commissioned in 2019, Febelauto ordered a prototype of a second-life battery + inverter system to be used in the Brussels International Motorshow 2020 and in other events organized by Febelauto.

The battery is currently used as a UPS at the headquarters of Out of Use in Beringen.

Capacity 7,5 kWh Inverter power output 3kVA
Chemistry NMC Inverter Victron Multigrid II
Battery output voltage 48V Control


Reference n°3: 36kWh stationary battery for Indrani Lodge

Commissioned by Optiwatt, the Indrani Lodge in Genappe purchased a circular battery from W4E. This is used for electricity grid services, PV energy storage and electric vehicle charging.

The aim of Indrani Lodge is to be self-sufficient in energy and to use Belgian products such as the battery from W4E for this purpose.

Capacity 36 kWh Inverter power output 30kVA
Chemistry LFP Inverter Victron Quattro
Battery output voltage 48V Control Victron Cerbo GX