Battery Overview
Our ambition is to make Li-ion Battery Technology affordable and the technology of choice.
Todays battery efficiency highly depends on the chemical composition but also on the weight to energy ratio. This especially on vessels, as reduced weight means less drag which again means less energy consumed by the propulsion. Our batteries are now close to 30% lighter than the average systems commonly used in the marine industry.
During the process of becoming a leader of electric propulsion in the marine industry we realised that we couldn’t find the right batteries at the right price. Hence we are now developing and producing battery systems ourselves. We are only using the finest materials available. Proudly we realise that the big three german car manufacturers are starting to share our view.
12 V / 24 V / 48 V Batteries
HV / High Energy Power Packs
Solid State Technology Batteries
ESS
Custom Design Battery
If you don’t find the right dimensions of the batteries, EPT can make you a custom designed battery for your specific need. Ask us for a quote, we understand that the batteries should fit the vessel and not the other way around.
Origin of the Battery Materials
| | Lithium | 92% Australia, 8% China | |
| | Nickel | Papua New Guinea | |
| | Cobalt | Papua New Guinea | |
| Manganese | China |
Battery comparison chart
| Electrical Characteristics | 12 VDC | 24 VDC | 48 VDC | HV / High Energy | Solid State Technology |
|---|---|---|---|---|---|
| Chemistry | LFP | NMC | NMC | NMC | Lithium-ion |
| Nominal Voltage | 12.8 VDC 150A | 25.6V 109A | 51.2V 52A | 88.8V factor of | 51.2V factor of |
| Energy | 2.0kWh | 2.8kWh | 2.8kWh | 15.7kWh factor of | 14.336kWh factor of |
| Cycle Life | 2500 @ 80% DoD | 2600 @ 80% DoD | 2600 @ 80% DoD | 2600 @ 80% DoD | 10’000 @ 80% DoD |
| Voltage | 2 in series is possible to get 24V, unlimited parallel | 2 in series is possible to get 48V, unlimited parallel | 2 in series is possible to get 96V, unlimited parallel | 10 in series, 24 in parallel | 16 in series, 24 in parallel |
| Standard Charge | 12 VCD | 24 VDC | 24 VDC | HV / High Energy | Solid State Technology |
|---|---|---|---|---|---|
| Max Continues Charge | 60A | 60A | 30A | 1C | 0.8C |
| Max Charge | 70A | 70A | 35A | 1.5C for 15 min | 1.2C for 15 min |
| Standard Discharge | 12 VDC | 24 VDC | 48 VDC | HV / High Energy | Solid State Technology |
|---|---|---|---|---|---|
| Max Continues Discharge | 120A | 120A | 120A | 1.6C | 1.2C |
| Peak Discharge | 200A<1S | 200A<1S | 200A<1S | 2 C for 15min, 3 C 10sec @ 25°C | 2 C for 10min, 3 C 10sec @ 25°C |
| Environmental | 12 VDC | 24 VDC | 48 VDC | HV / High Energy | Solid State Technology |
|---|---|---|---|---|---|
| Temp Range | -10°C to 50°C | -10°C to 45°C | -10°C to 45°C | -10°C to 45°C | -10°C to 50°C |
| Ideal Working Temperature | 5°C to 45°C | 5°C to 40°C | 5°C to 40°C | 5°C to 40°C | 5℃ to 45℃ |
| Mechanical | 12 VDC | 24 VDC | 48 VDC | HV / High Energy | Solid State Technology |
|---|---|---|---|---|---|
| Battery Case | Stainless Steel | Stainless Steel | Stainless Steel | ALU / SS top cover | ALU / SS top cover |
| Dimensions (LWH) mm | 300 x 420 x 115 mm | 300 x 420 x 115 mm | 300 x 420 x 115 mm | 1090 x 425 x 147 mm | 810 x 425 x 250 mm |
| System Mount | Racking System | Racking System | Racking System | Self-Stackable or Rack | Self-Stackable or Rack |
| Weight | 21 kg | 21 kg | 21 kg | 82kg | 102kg |
| Communication mode | CAN bus 250k | CAN bus 250k | CAN bus 250k | CAN bus 250k | CAN bus 250k |
| IP Rating | IP 54 | IP 54 | IP 54 | IP 65, IP 67 on request | IP 65, IP 67 on request |
| Certifications | CE, UN38.3 | CE, UN38.3 | CE, UN38.3 | CE, UN 38.3, DNV-GL pending | CE, UN 38.3, DNV-GL pending |
| General Warranty | 2 Years, 3 years an option | 2 Years, 3 years an option | 2 Years, 3 years an option | 2 Years, 3 years an option | 2 Years, 3 years an option |
| Cycle life Warranty | 5 Years | 5 Years | 5 Years | 5 Years | 5 Years |
High Performance
High energy densities on less space.
Safety
For us safety is as important as efficiency and power density.
Light weight
Reduced weight give less drag.
We have done extensive testing in order to make sure that the batteries can keep up with the forces of nature
Our partners and ourselves makes battery packs continuously cleaner by utilising the complete value of Lithium-Ion Cell-Technology. This by producing better designed packs and by developing smarter solutions resulting in a lower total cost of ownership for our customers. Our R&D, Engenieering and Production Departments are aligned in the efforts to create the best quality and competitive battery modules and packs with the full insight in the behaviour of the Li-ion Cell.
As we are continuously working on the optimisation of the Cycle-life it lowers the costs of service as the operational reliability increases and optimises the LCA (optimal Cycle-life and intelligent use of materials). For this matter EPT teamed up with the ‘best in class’ partners. For BMS (battery management system) and Cell design, we also have close partnerships and are involved in the design level of the components.
