HiG Energy Storage Cell Operating Life & Efficiency Degradation Data Sheet (314Ah)
Cell Model: ST314P050A
Cell Specification: 314 Ah LFP (LiFePO₄)
Test Conditions: Storage temperature 24 °C / Cycling temperature 27.4 °C
Charge/Discharge C-rate: 0.5P
System Initial Usable Capacity: 5.016 MWh (based on the standard D-Ocean-5016D)
System Efficiency Assumptions: PCS 98% / Transformer 99% / Inverter 98%
RTE Calculation: Includes DC discharge efficiency (0.5P-RTE@DC), DC discharge efficiency (0.5P-1cycle/day), and AC-side RTE (Dischargeable Energy @ RTE AC, Excluding Aux)
1 Operating Condition: 100% DOD
1.1 BESS Capacity Retention & Available Energy
| Year | Capacity Retention (1 cycle/day) |
DC Available Energy (MWh, 1 cycle/day) |
AC Discharge Energy @RTE Excluding Aux Consumption (MWh, 1 cycle/day) |
Capacity Retention (2 cycles/day) |
DC Available Energy (MWh, 2 cycles/day) |
AC Discharge Energy @RTE Excluding Aux Consumption (MWh, 2 cycles/day) |
|---|---|---|---|---|---|---|
| 0 | 100.00% | 5.016 | 4.766 | 100.00% | 5.016 | 4.766 |
| 1 | 95.37% | 4.784 | 4.538 | 93.66% | 4.698 | 4.454 |
| 2 | 92.61% | 4.645 | 4.404 | 89.92% | 4.510 | 4.274 |
| 3 | 90.35% | 4.532 | 4.295 | 86.91% | 4.359 | 4.129 |
| 4 | 88.37% | 4.433 | 4.201 | 84.18% | 4.222 | 3.997 |
| 5 | 86.67% | 4.348 | 4.120 | 81.81% | 4.104 | 3.882 |
| 6 | 85.11% | 4.269 | 4.043 | 79.60% | 3.993 | 3.776 |
| 7 | 83.59% | 4.193 | 3.969 | 77.46% | 3.885 | 3.672 |
| 8 | 82.21% | 4.124 | 3.901 | 75.52% | 3.788 | 3.578 |
| 9 | 80.89% | 4.058 | 3.837 | 73.67% | 3.695 | 3.489 |
| 10 | 79.59% | 3.992 | 3.773 | 71.83% | 3.603 | 3.400 |
| 11 | 78.38% | 3.932 | 3.716 | 70.14% | 3.518 | 3.318 |
| 12 | 77.22% | 3.874 | 3.659 | 68.51% | 3.436 | 3.239 |
| 13 | 76.06% | 3.815 | 3.602 | 66.86% | 3.354 | 3.159 |
| 14 | 74.98% | 3.761 | 3.551 | 65.33% | 3.277 | 3.085 |
| 15 | 73.93% | 3.708 | 3.499 | 63.85% | 3.203 | 3.010 |
| 16 | 72.87% | 3.655 | 3.447 | — | — | — |
| 17 | 71.87% | 3.605 | 3.400 | — | — | — |
| 18 | 70.90% | 3.556 | 3.352 | — | — | — |
| 19 | 69.92% | 3.507 | 3.306 | — | — | — |
| 20 | 68.99% | 3.461 | 3.261 | — | — | — |
1.2 RTE Efficiency & DC Discharge Efficiency
| Year | RTE@DC (1 cycle/day) |
RTE@DC (2 cycles/day) |
DC Discharge Efficiency (1 cycle/day) |
DC Discharge Efficiency (2 cycles/day) |
|---|---|---|---|---|
| 0 | 94.01% | 94.00% | 96.96% | 96.95% |
| 1 | 93.70% | 93.60% | 96.80% | 96.75% |
| 2 | 93.60% | 93.50% | 96.75% | 96.70% |
| 3 | 93.50% | 93.40% | 96.70% | 96.64% |
| 4 | 93.50% | 93.30% | 96.70% | 96.59% |
| 5 | 93.50% | 93.20% | 96.70% | 96.54% |
| 6 | 93.40% | 93.10% | 96.64% | 96.49% |
| 7 | 93.30% | 93.00% | 96.59% | 96.44% |
| 8 | 93.20% | 92.90% | 96.54% | 96.38% |
| 9 | 93.10% | 92.80% | 96.49% | 96.33% |
| 10 | 93.00% | 92.70% | 96.44% | 96.28% |
| 11 | 93.00% | 92.60% | 96.44% | 96.23% |
| 12 | 92.90% | 92.50% | 96.38% | 96.18% |
| 13 | 92.80% | 92.40% | 96.33% | 96.12% |
| 14 | 92.80% | 92.30% | 96.33% | 96.07% |
| 15 | 92.70% | 92.00% | 96.28% | 95.92% |
| 16 | 92.60% | 91.90% | 96.23% | 95.86% |
| 17 | 92.60% | 91.70% | 96.23% | 95.76% |
| 18 | 92.50% | 91.50% | 96.18% | 95.66% |
| 19 | 92.50% | 91.30% | 96.18% | 95.55% |
| 20 | 92.43% | 91.00% | 96.14% | 95.39% |
2 Operating Condition: 95% DOD
2.1 BESS Capacity Retention & Available Energy
| Year | Capacity Retention (1 cycle/day) |
DC Available Energy (MWh, 1 cycle/day) |
AC Discharge Energy @RTE Excluding Aux Consumption (MWh, 1 cycle/day) |
Capacity Retention (2 cycles/day) |
DC Available Energy (MWh, 2 cycles/day) |
AC Discharge Energy @RTE Excluding Aux Consumption (MWh, 2 cycles/day) |
|---|---|---|---|---|---|---|
| 0 | 100.00% | 5.016 | 4.766 | 100.00% | 5.016 | 4.766 |
| 1 | 95.41% | 4.786 | 4.540 | 93.89% | 4.709 | 4.465 |
| 2 | 92.67% | 4.648 | 4.407 | 90.25% | 4.527 | 4.290 |
| 3 | 90.44% | 4.537 | 4.299 | 87.28% | 4.378 | 4.146 |
| 4 | 88.44% | 4.436 | 4.204 | 84.61% | 4.244 | 4.017 |
| 5 | 86.73% | 4.350 | 4.122 | 82.28% | 4.127 | 3.905 |
| 6 | 85.15% | 4.271 | 4.045 | 80.12% | 4.019 | 3.800 |
| 7 | 83.63% | 4.195 | 3.971 | 78.05% | 3.915 | 3.700 |
| 8 | 82.25% | 4.126 | 3.903 | 76.18% | 3.821 | 3.609 |
| 9 | 80.95% | 4.060 | 3.839 | 74.39% | 3.731 | 3.523 |
| 10 | 79.65% | 3.995 | 3.776 | 72.61% | 3.642 | 3.436 |
| 11 | 78.46% | 3.936 | 3.719 | 70.96% | 3.560 | 3.357 |
| 12 | 77.31% | 3.878 | 3.663 | 69.38% | 3.480 | 3.280 |
| 13 | 76.15% | 3.820 | 3.606 | 67.79% | 3.400 | 3.203 |
| 14 | 75.09% | 3.767 | 3.556 | 66.31% | 3.326 | 3.131 |
| 15 | 74.05% | 3.715 | 3.505 | 64.87% | 3.254 | 3.058 |
| 16 | 73.00% | 3.662 | 3.453 | — | — | — |
| 17 | 72.02% | 3.613 | 3.407 | — | — | — |
| 18 | 71.06% | 3.565 | 3.360 | — | — | — |
| 19 | 70.10% | 3.516 | 3.314 | — | — | — |
| 20 | 69.21% | 3.471 | 3.271 | — | — | — |
2.2 RTE Efficiency & DC Discharge Efficiency
| Year | RTE@DC (1 cycle/day) |
RTE@DC (2 cycles/day) |
DC Discharge Efficiency (1 cycle/day) |
DC Discharge Efficiency (2 cycles/day) |
|---|---|---|---|---|
| 0 | 94.01% | 94.00% | 96.96% | 96.95% |
| 1 | 93.70% | 93.60% | 96.80% | 96.75% |
| 2 | 93.60% | 93.50% | 96.75% | 96.70% |
| 3 | 93.50% | 93.40% | 96.70% | 96.64% |
| 4 | 93.50% | 93.30% | 96.70% | 96.59% |
| 5 | 93.50% | 93.20% | 96.70% | 96.54% |
| 6 | 93.40% | 93.10% | 96.64% | 96.49% |
| 7 | 93.30% | 93.00% | 96.59% | 96.44% |
| 8 | 93.20% | 92.90% | 96.54% | 96.38% |
| 9 | 93.10% | 92.80% | 96.49% | 96.33% |
| 10 | 93.00% | 92.70% | 96.44% | 96.28% |
| 11 | 93.00% | 92.60% | 96.44% | 96.23% |
| 12 | 92.90% | 92.50% | 96.38% | 96.18% |
| 13 | 92.80% | 92.40% | 96.33% | 96.12% |
| 14 | 92.80% | 92.30% | 96.33% | 96.07% |
| 15 | 92.70% | 92.00% | 96.28% | 95.92% |
| 16 | 92.60% | 91.90% | 96.23% | 95.86% |
| 17 | 92.60% | 91.70% | 96.23% | 95.76% |
| 18 | 92.50% | 91.50% | 96.18% | 95.66% |
| 19 | 92.50% | 91.30% | 96.18% | 95.55% |
| 20 | 92.43% | 91.00% | 96.14% | 95.39% |
3 Operating Condition: 90% DOD
3.1 BESS Capacity Retention & Available Energy
| Year | Capacity Retention (1 cycle/day) |
DC Available Energy (MWh, 1 cycle/day) |
AC Discharge Energy @RTE Excluding Aux Consumption (MWh, 1 cycle/day) |
Capacity Retention (2 cycles/day) |
DC Available Energy (MWh, 2 cycles/day) |
AC Discharge Energy @RTE Excluding Aux Consumption (MWh, 2 cycles/day) |
|---|---|---|---|---|---|---|
| 0 | 100.00% | 5.016 | 4.766 | 100.00% | 5.016 | 4.766 |
| 1 | 95.44% | 4.787 | 4.541 | 94.07% | 4.719 | 4.474 |
| 2 | 92.70% | 4.650 | 4.408 | 90.56% | 4.542 | 4.304 |
| 3 | 90.51% | 4.540 | 4.302 | 87.70% | 4.399 | 4.166 |
| 4 | 88.55% | 4.442 | 4.209 | 85.11% | 4.269 | 4.041 |
| 5 | 86.87% | 4.357 | 4.129 | 82.88% | 4.157 | 3.933 |
| 6 | 85.33% | 4.280 | 4.054 | 80.81% | 4.054 | 3.833 |
| 7 | 83.83% | 4.205 | 3.981 | 78.81% | 3.953 | 3.736 |
| 8 | 82.49% | 4.138 | 3.915 | 76.99% | 3.862 | 3.648 |
| 9 | 81.23% | 4.075 | 3.853 | 75.27% | 3.775 | 3.564 |
| 10 | 79.99% | 4.012 | 3.792 | 73.55% | 3.689 | 3.481 |
| 11 | 78.84% | 3.955 | 3.737 | 71.97% | 3.610 | 3.405 |
| 12 | 77.71% | 3.898 | 3.682 | 70.45% | 3.534 | 3.331 |
| 13 | 76.55% | 3.840 | 3.625 | 68.92% | 3.457 | 3.256 |
| 14 | 75.49% | 3.787 | 3.575 | 67.49% | 3.385 | 3.187 |
| 15 | 74.48% | 3.736 | 3.525 | 66.10% | 3.316 | 3.117 |
| 16 | 73.45% | 3.684 | 3.475 | — | — | — |
| 17 | 72.50% | 3.637 | 3.430 | — | — | — |
| 18 | 71.59% | 3.591 | 3.384 | — | — | — |
| 19 | 70.66% | 3.544 | 3.340 | — | — | — |
| 20 | 69.78% | 3.500 | 3.298 | — | — | — |
3.2 RTE Efficiency & DC Discharge Efficiency
| Year | RTE@DC (1 cycle/day) |
RTE@DC (2 cycles/day) |
DC Discharge Efficiency (1 cycle/day) |
DC Discharge Efficiency (2 cycles/day) |
|---|---|---|---|---|
| 0 | 94.01% | 94.00% | 96.96% | 96.95% |
| 1 | 93.70% | 93.60% | 96.80% | 96.75% |
| 2 | 93.60% | 93.50% | 96.75% | 96.70% |
| 3 | 93.50% | 93.40% | 96.70% | 96.64% |
| 4 | 93.50% | 93.30% | 96.70% | 96.59% |
| 5 | 93.50% | 93.20% | 96.70% | 96.54% |
| 6 | 93.40% | 93.10% | 96.64% | 96.49% |
| 7 | 93.30% | 93.00% | 96.59% | 96.44% |
| 8 | 93.20% | 92.90% | 96.54% | 96.38% |
| 9 | 93.10% | 92.80% | 96.49% | 96.33% |
| 10 | 93.00% | 92.70% | 96.44% | 96.28% |
| 11 | 93.00% | 92.60% | 96.44% | 96.23% |
| 12 | 92.90% | 92.50% | 96.38% | 96.18% |
| 13 | 92.80% | 92.40% | 96.33% | 96.12% |
| 14 | 92.80% | 92.30% | 96.33% | 96.07% |
| 15 | 92.70% | 92.00% | 96.28% | 95.92% |
| 16 | 92.60% | 91.90% | 96.23% | 95.86% |
| 17 | 92.60% | 91.70% | 96.23% | 95.76% |
| 18 | 92.50% | 91.50% | 96.18% | 95.66% |
| 19 | 92.50% | 91.30% | 96.18% | 95.55% |
| 20 | 92.43% | 91.00% | 96.14% | 95.39% |
4 Comparison of Key Milestones Across the Three DOD Operating Conditions
| Metric | DOD | Year 0 | Year 5 | Year 10 | Year 15 | Year 20 |
|---|---|---|---|---|---|---|
| Capacity Retention (1 cycle/day) |
100% | 100.00% | 86.67% | 79.59% | 73.93% | 68.99% |
| Capacity Retention (1 cycle/day) |
95% | 100.00% | 86.73% | 79.65% | 74.05% | 69.21% |
| Capacity Retention (1 cycle/day) |
90% | 100.00% | 86.87% | 79.99% | 74.48% | 69.78% |
| Capacity Retention (2 cycles/day) |
100% | 100.00% | 81.81% | 71.83% | 63.85% | — |
| Capacity Retention (2 cycles/day) |
95% | 100.00% | 82.28% | 72.61% | 64.87% | — |
| Capacity Retention (2 cycles/day) |
90% | 100.00% | 82.88% | 73.55% | 66.10% | — |
| RTE@DC (1 cycle/day) |
100% | 94.01% | 93.50% | 93.00% | 92.70% | 92.43% |
| RTE@DC (1 cycle/day) |
95% | 94.01% | 93.50% | 93.00% | 92.70% | 92.43% |
| RTE@DC (1 cycle/day) |
90% | 94.01% | 93.50% | 93.00% | 92.70% | 92.43% |
| DC Discharge Efficiency (1 cycle/day) |
100% | 96.96% | 96.70% | 96.44% | 96.28% | 96.14% |
| DC Discharge Efficiency (1 cycle/day) |
95% | 96.96% | 96.70% | 96.44% | 96.28% | 96.14% |
| DC Discharge Efficiency (1 cycle/day) |
90% | 96.96% | 96.70% | 96.44% | 96.28% | 96.14% |