Rimac SineStack

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This is Rimac’s first move into the stationary energy storage market, their first product is the SineStack.

The interesting aspects of this design is the integrated inverter, active balancing and the ability to switch the load on a module basis to extend the working lifetime.


  • Usable energy = 790kWh (832 kWh total)
    • Usable window = 95%
  • Output = 3 phase 400V AC
  • Rated power = 400kVA for 2 hours (0.5C rate)
    • Power factor = -1.0 to +1.0
    • Maximum THD = 3% at rated power
    • AC round trip efficiency >92%
  • Dimensions = 2590 x 1950 x 1300mm
    • Volume = 6566 litres (6.566m3)
  • Cooling = water / glycol
  • Cycles < 12,000 at 95% DoD
  • BMS
    • Active SoC balancing increases energy >7%
    • Energy Capacity Tracker
    • Energy Capacity Predictor
  • Cells
    • Chemistry = LFP
  • Metrics
    • Volumetric energy density = 127 Wh/litre

This post has been built based on the support and sponsorship from: Eatron TechnologiesAbout:EnergyAVANT Future MobilityQuarto Technical ServicesTAE Power Solutions and The Limiting Factor. 

As a comparison the Tesla 2020 Powerwall 2 has a volumetric energy density of 111 Wh/litre, however, this is a much smaller unit with just 13.5kWh usable.

Let us know your experience with the Rimac SineStack so we can develop a deeper understanding.


  1. Rimac unveils ‘most technically advanced BESS in the world’, SineStack, Energy Storage News
  2. Introducing Rimac Energy, Rimac

ESS – Energy Storage System

Energy Storage Systems (ESS) play a pivotal role in modern energy management, offering a dynamic solution to address the intermittent nature of renewable energy sources. ESS store excess energy during periods of low demand and release it when demand peaks, enhancing grid stability and reliability. Key technologies like lithium-ion batteries enable efficient ESS implementation, aiding in the integration of renewable energy into the power grid. ESS not only supports grid balancing but also facilitates backup power during outages and contributes to the transition towards a more resilient and sustainable energy infrastructure.

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