Engineering report · reviewed against NEC 2026 & BS 7671:2018+A2
Engineering Breakdown: Running a Hyundai Ioniq 5 (24A Level 2 Portable EVSE) on the myenergi Libbi (5kW Inverter + 5kWh Battery)
When pairing the myenergi Libbi (5kW Inverter + 5kWh Battery) (5,120 Wh LiFePO4 capacity, 5,000 W continuous, 7,500 W surge) with a Hyundai Ioniq 5 (24A Level 2 Portable EVSE) (5,760 W running, 5,760 W starting surge), the system operates at 110% of continuous inverter capacity on a 230 V UK/EU/AU circuit. Our UK/EU/AU verdict is Continuous Overload, so the runtime figures below are theoretical battery-energy values only. Wiring the connection over a 7.5 m run calls for a 25 A MCB and 2.5 mm² copper, terminated at a Type 2 EVSE · IEC 60309 32A Commando connection.
1. Compatibility Verdict & Inverter Load Utilization
In UK/EU/AU 230 V mode the Hyundai Ioniq 5 (24A Level 2 Portable EVSE) loads the myenergi Libbi (5kW Inverter + 5kWh Battery)'s inverter to 110% of its 5,000 W continuous rating and 74% of its 7,500 W surge rating. Because continuous demand exceeds the inverter by 520 W, the unit will shut down within seconds of starting the load. The EcoFlow Delta Pro Ultra (1 Inverter + 1 Battery) is the smallest compatible upgrade.
| Check | Load requires | myenergi Libbi provides | UK/EU/AU |
|---|---|---|---|
| Continuous output | 5,520 W | 5,000 W | Fail |
| Start-up surge | 5,520 W | 7,500 W | Pass |
| Voltage | 230 V | 230 V | Pass |
| Connection | Type 2 EVSE · IEC 60309 32A Commando | Hardwired consumer unit (RCBO protected) |
An EVSE is a constant-current device: the vehicle draws exactly the current advertised by the J1772/NACS pilot signal, so the 5,760 W figure is both the running load and the start-up load — there is no motor inrush. That makes the calculation unusually clean. If you want to stay under the 80% sustained-load guideline, set the charge current in the vehicle app to 16 A or less, which keeps the myenergi Libbi (5kW Inverter + 5kWh Battery) at roughly 3,840 W. A full battery delivers about 3.9 kWh into the pack after inverter and on-board charger losses, worth roughly 14 miles (22 km) of driving at 3.5 mi/kWh.
The myenergi Libbi (5kW Inverter + 5kWh Battery) is a UK smart home storage system, installed on a dedicated circuit from the consumer unit under BS 7671 and typically paired with a time-of-use tariff to charge overnight and discharge at peak. Backup operation for specific circuits depends on the installer fitting an EPS/backup switch.
Compatible alternative: the EcoFlow Delta Pro Ultra (1 Inverter + 1 Battery) with the Hyundai Ioniq 5 (24A Level 2 Portable EVSE) report shows the full sizing for a unit that passes all three checks.
2. Real-World Runtime by Duty Cycle
Nameplate capacity is not usable capacity. DC-to-AC conversion, battery management overhead and cell protection reduce the 5,120 Wh rating to about 4,352 Wh of deliverable AC energy (85% system efficiency). EV charging runs at a fixed current, so the 100% row is the realistic figure; lower rows apply only if you schedule charging in intervals.
| Duty cycle | Average draw | Runtime (no solar) | Energy per 24 h |
|---|---|---|---|
| 25% | 1,380 W | 3.2 hrs | 33.1 kWh |
| 50% | 2,760 W | 1.6 hrs | 66.2 kWh |
| 65% | 3,588 W | 1.2 hrs | 86.1 kWh |
| 100% | 5,520 W | 47 min | 132.5 kWh |
Even at a 50% duty cycle the battery lasts 1.6 hrs, so plan on solar, grid or generator recharging for anything longer than an evening outage. Because the inverter cannot actually run this load in UK/EU/AU mode, treat these numbers as an energy-budget reference for a compatible inverter of the same capacity.
3. BS 7671 / IEC 60364 Breaker & Cable Sizing
IEC-based codes size protection by design current rather than a blanket 125% multiplier: Ib ≤ In ≤ Iz. At 230 V the load draws 24.0 A (the EVSE's 24 A pilot current at 230 V), so a 25 A Type B/C MCB with RCD protection applies. In the UK, BS 7671 Section 722 additionally requires a dedicated circuit and Type A or Type B RCD for EV charge points.
| One-way distance | MCB | Min. cable | Voltage drop |
|---|---|---|---|
| 7.5 m (25 ft) | 25 A | 2.5 mm² | 1.16% |
| 15 m (49 ft) | 25 A | 2.5 mm² | 2.32% |
| 22.5 m (74 ft) | 25 A | 4.0 mm² | 2.16% |
| 30 m (98 ft) | 25 A | 4.0 mm² | 2.89% |
Moving the myenergi Libbi (5kW Inverter + 5kWh Battery) from 7.5 m to 30 m away forces the conductor up from 2.5 mm² to 4.0 mm² — park the unit as close to the load as ventilation and weather protection allow.
4. Solar Array Recharge Time Breakdown
The myenergi Libbi (5kW Inverter + 5kWh Battery) accepts up to 5,000 W of photovoltaic input. Real arrays rarely deliver nameplate output, so we apply an 80% harvest factor for MPPT conversion, cell temperature and soiling, and convert hours to days using 4.5 peak-sun-hours — a conservative annual average for the US, southern Europe and Australia (UK winters can fall below 1.5).
| PV array | Real harvest | 0–100% recharge | Sun-days @ 4.5 PSH | Net with load @ 50% |
|---|---|---|---|---|
| 400 W | 320 W | 16.0 hrs | 3.6 | −2,440 W |
| 800 W | 640 W | 8.0 hrs | 1.8 | −2,120 W |
| 1,600 W | 1,280 W | 4.0 hrs | 0.9 | −1,480 W |
| 3,000 W | 2,400 W | 2.1 hrs | 0.5 | −360 W |
| 5,000 W | 4,000 W | 1.3 hrs | 0.3 | +1,240 W |
A typical 800 W portable array refills the battery in about 8.0 hrs of strong sun, while maxing out the 5,000 W input cuts that to 1.3 hrs. To fully offset the Hyundai Ioniq 5 (24A Level 2 Portable EVSE) at a 50% duty cycle (2,760 W average) during daylight you need roughly 3,450 W of panels, which this unit can accept.
5. Frequently Asked Questions
Can the myenergi Libbi (5kW Inverter + 5kWh Battery) run a Hyundai Ioniq 5 (24A Level 2 Portable EVSE)?
Not reliably in the UK, Europe and Australia — our verdict is "Continuous Overload". The 5,520 W running load exceeds the 5,000 W inverter. The EcoFlow Delta Pro Ultra (1 Inverter + 1 Battery) is a compatible alternative.
How many miles of range can the myenergi Libbi (5kW Inverter + 5kWh Battery) add to a Hyundai Ioniq 5?
A full 5,120 Wh charge delivers about 3.9 kWh to the vehicle battery after inverter (85%) and on-board charger (90%) losses — roughly 14 miles at 3.5 mi/kWh. Charging at this profile is not possible on this unit without reducing current or changing voltage.
What breaker and wire size do I need to connect a Hyundai Ioniq 5 (24A Level 2 Portable EVSE) to the myenergi Libbi (5kW Inverter + 5kWh Battery)?
At 230 V the load draws 24.0 A. Under BS 7671 / IEC 60364 the protective device must be at least the design current (Ib ≤ In ≤ Iz), so use a 25 A MCB with RCD protection on 2.5 mm² copper cable for runs up to 7.5 m (1.2% voltage drop). Connection: Type 2 EVSE · IEC 60309 32A Commando.
How long does it take to recharge the myenergi Libbi (5kW Inverter + 5kWh Battery) with solar panels?
With an 800 W array and an 80% real-world harvest factor, a full recharge takes about 8.0 hrs of peak sun (1.8 days at 4.5 peak-sun-hours). At its maximum 5,000 W solar input it drops to 1.3 hrs.
Methodology & safety note
Specifications come from manufacturer datasheets in our open dataset; ampacity and resistance values follow NEC Table 310.16 and Chapter 9 Table 8, and BS 7671 Appendix 4. Calculations assume copper conductors, 30 °C ambient and no bundling derating. Inverter-to-panel connections require a listed transfer switch or interlock to prevent back-feeding the grid. These results are an engineering estimate, not a substitute for a licensed electrician and local permit. See our methodology and safety disclaimer.