Solid State Technology Batteries

Unlike traditional lithium-ion batteries, which use liquid electrolytes, the solid-state technology batteries electrolytes do not. This fundamental difference enhances safety, cycle life, and overall performance. They can be overcharged, heated to extreme values, and even punctured with a projectile with no ill effects.

We can develop batteries equipped with a hardware override switch to bypass all electronic control systems if necessary. As overcharge, over-discharge, short circuits, and similar issues have minimal impact other than reducing battery life, you can be assured of accessing the power you need, regardless of the situation.

This technology also extends the usable cycle life to over 10,000 cycles, making it more environmentally friendly and cost-effective. By prolonging the lifespan of materials and increasing the return on investment, it offers significant ecological and economic benefits.

Solid State Battery
Solid state technology battery sketch
  • Cycle Life of more than 10´000 easily achievable
  • A greener, more economical battery with a lifespan 3-4 times longer than standard batteries, at no extra cost
  • Outstanding safety record
  • Can function without cooling in a broader temperature range, from 0 to 35°C
Electrical CharacteristicsSolid State Technology
Chemistry Lithium-ion
Nominal Voltage51.2V factor of
Energy14.336kWh factor of
Cycle Life10’000 @ 80% DoD
Voltage16 in series, 24 in parallel

Standard ChargeSolid State Technology
Max Continues Charge0.8C
Max Charge1.2C for 15 min

Standard DischargeSolid State Technology
Max Continues Discharge1.2C
Peak Discharge2 C for 10min, 3 C 10sec @ 25°C

EnvironmentalSolid State Technology
Temp Range-10°C to 50°C
Ideal Working Temperature5℃ to 45℃

MechanicalSolid State Technology
Battery CaseALU / SS top cover
Dimensions (LWH) mm810 x 425 x 250 mm
System MountSelf-Stackable or Rack
Communication modeCAN bus 250k
IP RatingIP 65, IP 67 on request
CertificationsCE, UN 38.3, DNV-GL pending
General Warranty2 Years, 3 years an option
Cycle life Warranty5 Years
safety points
  • When we start from scratch, we do extensive failure analyses before and during design stage
  • Our BMS is robust and proven, used in many industry and marine applications
  • We measure each single cell voltage and get alarms if one of the cells should get bad instant, even on a trend
  • 4/7 balancing as soon as the cells hit a certain target, this to avoid self-discharge and unneeded heat production
  • Each cell has its own cell fuse
  • Gas exhaust system
  • Pre-charge circuit for start-up
  • Black-out start, systems can start up when the ship is totally depowered, must have emergency supply battery 24V


Like all batteries, also EPTechnologies batteries age, by usage and by calendar aging. Calendar aging is around 1% per year if kept below 30 deg storage temp and if stored at 50 to 60% SOC.

With repeated charging and discharging (cyclical ageing).

DODCycle life depending on SOC usage
20%No Data
30%No Data
40%No Data
50%No Data
90% 9’000
100% 8’000

DOD: Depth of Discharge

SOC: State of Charge

These batteries have the potential to transform the way energy is stored and utilized in maritime transportation, contributing to a greener and more sustainable future. 


  • Never below 10% SOC better 20%
  • Never over 95% SOC
  • Average temperature at 25 °C, never above 40 °C.
  • Connection cable, 20 kg each
  • Normally max. 1 C discharge
  • Normally max 0.5C charge is 8000 cycles and remaining capacity is 75%


EPTechnologies guarantees the remaining capacity according to the following diagram depending on the DoD per cycle


  • Each string can consist of 1 to 18 batteries in series for nominal, up to 844V if needed.
  • Each string has a string controller.
  • The string controllers have manual and remote disconnect switches and pre-charge


  • Pack control Unit PCU has double communication lines.
  • Optional slave PCU control unit that can take over if the master fails is an option.
  • Up to 24 Strings in parallel per pack controller.