Quick answer: For daily driving in an Australian BYD Sealion 6 DM-i after the break-in period, leave the car in EV mode, charge it overnight, and let the battery do the work. For longer trips, choose the SOC target according to charging availability and the reserve you need, and consider HEV mode and Compulsory hold when retaining charge is a priority. The two settings this guide focuses on are the EV/HEV switch and the SOC target.
Observation date: 27 October 2026. Prices below are Australian before-on-road prices from the CarExpert review (titled 2026 review, published 26 September 2025, Essential test car) and the WhichCar 1 September 2025 Premium Extended Range report, not re-checked dealer prices. Specifications are the Australian Sealion 6 specification; European Seal U DM-i figures are not used as evidence for the Australian car. Manual references are to the 2024 Australian Sealion 6 owners handbook; software interfaces on MY25/MY26 cars may differ, so check your own car’s manual.
First, check which Sealion 6 you have
The same car family is sold under three names, and that is where most confusion starts. In Australia it is the Sealion 6. In Europe it is the Seal U DM-i. In China and Mexico the related model is known as the Song Plus. They share the DM-i plug-in hybrid idea, but trim, battery and charging details differ by market, so a European owner report does not automatically describe an Australian car.
Within Australia, the difference that matters for this guide is battery size. The Standard Range versions use an 18.3 kWh Blade battery; the Extended Range versions use a 26.6 kWh Blade battery. That is a 45.4% increase by simple division ((26.6 − 18.3) ÷ 18.3 ≈ 45.36%), matching the 45% figure in the WhichCar report. Per the BYD Australia specification sheet, the NEDC electric ranges are: Essential Standard Range (18.3 kWh, front-wheel drive) 92 km; Premium Standard Range (18.3 kWh, all-wheel drive) 81 km; Premium Extended Range (26.6 kWh, all-wheel drive) 128 km; Dynamic Extended Range (26.6 kWh, front-wheel drive) 140 km. WhichCar’s “about 80 km” and “nearly 130 km” are approximate reporting of the Premium figures. NEDC figures are optimistic, so treat them as a comparison scale, not a promise for your commute. Separately, the CarExpert review of the Essential reports closer to 70–75 km with some freeway driving mixed in — a review measurement, not a claimed figure, and not a result for the Extended Range cars. The figures come from different test conditions: 92 km is the Essential’s NEDC claimed range, while CarExpert reported around 70–75 km with some freeway driving mixed in.
Australian prices, before on-road costs, from the CarExpert 2026 review are: Essential $42,990, Dynamic Standard Range $45,990, Dynamic Extended Range $46,990, Premium Standard Range $52,990 and Premium Extended Range $52,990. The Premium Extended Range costs the same as the Premium Standard Range on that list, which is exactly why you should confirm the battery size on the specific car you are buying rather than trusting the badge alone.
Step 1: Switch between EV and HEV
Use the EV/HEV switch on the centre console. The 2024 Australian handbook describes the switch as a lever: the two-wheel-drive layout is on p.33 and the four-wheel-drive layout on p.35 — push it forward for EV mode, pull it back for HEV mode, and watch the matching indicator on the instrument cluster. The correspondence between that 2024 handbook description and a specific MY25/MY26 configuration has not been confirmed here, so if your car does not match that description, follow your own car’s manual rather than this paragraph.
In EV mode the car prioritises battery power, but it may still switch to HEV automatically for power demand, temperature, charge level or engine-maintenance needs. In HEV mode the petrol engine may drive the wheels or generate electricity for the motor depending on speed and demand, and the car may still run briefly on electricity alone. A mode name is not a live readout of whether the engine is running at that moment. EV and HEV are operating modes. Selecting HEV manually requests hybrid operation, but the car can also switch automatically. The mode indicator alone cannot establish whether a fault is present.
At power-on, the manual’s mode-memory rule is worth knowing (2024 handbook p.102). With a high state of charge, the car switches to EV mode automatically. With a moderate charge, it remembers the last driving mode you used. If the car starts in a mode you did not expect, SOC and mode memory are possible explanations to check first.
Step 2: Set the SOC target for the trip you are actually doing
Open the Energy Manager: pull down the status bar at the top of the infotainment screen, or go to the infotainment system → New Energy → Energy Manager. This is where you set the SOC target — the charge level you want the car to aim for while driving.
The manual’s rule is directional, not a fixed number. If you can charge at your destination, lower the SOC target so the car uses the stored electricity and saves fuel. If you cannot charge at your destination, raise the SOC target so the car holds charge and keeps the driving experience you expect. The car also adjusts the target itself for altitude and ambient temperature, so a target you set on a flat summer day may behave slightly differently on a cold mountain road. Such variation can be consistent with the manual’s description.
Two hold behaviours sit under that target (2024 handbook pp.100–101). Intelligent SOC hold gives priority to fuel economy while still considering the hold demand. Compulsory SOC hold gives priority to holding charge as close as possible to the target. Intelligent suits drivers who want the car to weigh economy first; Compulsory is the choice when you have a specific reason to arrive with charge left — a long climb, a town with no charger, or a return leg you want to drive quietly on electricity. Neither is presented here as the universal default for all driving.
The manual does not prescribe a highway SOC percentage. Choose a target according to charging availability and the reserve you need, watch how the car behaves, and adjust to your route rather than treating any single number as correct for every car.
Step 3: The daily routine — charge overnight, drive on EV
For a commuter with home charging, the routine is deliberately boring — with one exception. During the first 2,000 km break-in period, the 2024 Australian handbook (p.108) recommends HEV use for at least 50% of driving, so the daily-EV routine below applies after break-in, not unconditionally from day one. After that, plug in overnight, start the day in EV mode, and drive in ECO if your car offers it. WhichCar cites an average Australian commute of around 30 km per day; on that arithmetic, a 92 km claimed range covers about three days of commuting and a 128 km claimed range about four (128 ÷ 30 ≈ 4.27) — before freeway driving, cold weather and hills take their cut. The CarExpert 70–75 km figure is the Essential review measurement with some freeway driving mixed in, and it still covers about two days of that 30 km commute.
The point of the routine is not to chase a record low fuel figure. For the Essential, the quoted 1.1 L/100 km is a laboratory-test claimed figure, not a prediction for any particular week. CarExpert recorded an indicated 4.8 L/100 km after several days of commuting, having started the week fully charged; the review does not establish charge-depleted consumption or a repeat-charging schedule. Neither figure establishes consumption over repeated journeys without external charging. For that use case, consult separately identified charge-depleted data for the same Australian variant.
Step 4: Plan your charge reserve for a longer trip
Before a longer trip, choose the SOC target according to charging availability and any charge reserve you need on arrival. If retaining charge is a priority, consider HEV mode and Compulsory SOC hold. The handbook does not establish that this strategy saves fuel on every highway trip.
If you notice high engine revs after an EV-to-HEV transition, engine sound alone cannot identify the active hybrid mode or establish whether the behaviour is normal. A question raised in UK Seal U DM-i owner discussion is why the engine seems to rev high when the car changes from EV to HEV. The system can operate in series, with the engine generating electricity while the motor drives the wheels, but engine sound alone does not establish the active hybrid mode or confirm that a particular symptom is normal. If the revving comes with a warning light, a smell, or a loss of power, that is different — stop using the car normally and contact a BYD dealer rather than trying to diagnose it from a forum thread.
If you have retained enough charge for the final leg and EV conditions are met, you can select EV for that leg.
Step 5: Regeneration and the settings you can leave alone
In the same Energy Manager menu you can choose Standard or High energy feedback intensity — the regenerative braking strength. Standard suits drivers who dislike a strong lift-off slowdown; High gives a stronger lift-off slowdown feel. No comparison test is cited here for total energy recovered, so this article does not promise that High recovers more energy overall. The setting is remembered after each power-on, so set it once to your taste and leave it. Unlike some rivals, the Sealion 6 is not a one-pedal car, so do not expect the car to brake to a standstill on regeneration alone.
For longer parking, the manual’s battery guidance is worth a line (2024 handbook p.105): keep the charge between 40% and 60% if the car will sit unused for more than seven days, and charge fully with AC at least once a week in normal use. Those are maintenance habits, not daily driving settings — do not confuse them with the SOC driving target above.
Common problems
The car keeps starting the engine on short trips. Check the SOC target first. A high Compulsory hold tells the car to protect charge, so it may increase engine use to pursue the target. Lower the target when you can charge at your destination, and confirm the car is in EV mode rather than a remembered HEV mode from the last highway trip.
Fuel use looks high despite the plug-in badge. Count how often the car is actually charged. CarExpert recorded an indicated 4.8 L/100 km after several days of commuting, having started the week fully charged; the review does not establish charge-depleted consumption or a repeat-charging schedule. A week without charging is a different car in practice, and no SOC setting fixes a missing charger.
Public charging is slower than expected. The BYD Australia specification sheet lists CCS2 DC charging at 18 kW for the Sealion 6, but the 10–80% charging time remains unverified in this article and must not be derived from the peak figure. Check the charging specification for your exact Australian variant before planning a trip around a fast-charger stop — and plan overnight AC charging as the normal routine, not the exception.
Why the claimed range differs from the dashboard. Compare like with like. The 92 km and 128 km figures are NEDC claimed ranges for different variants, while 70–75 km is the CarExpert Essential review measurement with some freeway driving mixed in. Use the claimed figures to compare cars, and use your own first two weeks of driving to set expectations for your route.
Applicability note
This guide covers the Australian BYD Sealion 6 (MY25/MY26). European Seal U DM-i, Chinese Song Plus and Singapore-market reports are used only where labelled, and their specifications are not applied to the Australian car. The 10–80% charging time and the correspondence between the 2024 handbook switch description and specific MY25/MY26 configurations remain unverified in this article; verify both on your own car and its manual before relying on them. For a related BYD plug-in hybrid used differently — towing — see our BYD Shark 6 towing guide for Australia; for long-distance charging planning in a BYD electric SUV, see our Sealion 7 Nullarbor charging guide.
Sources
Australian prices, Essential specification (18.3 kWh, 92 km NEDC claimed range, 60 L tank, 95-octane fuel, 1940 kg), indicated 4.8 L/100 km after several days of commuting from a full start (the review does not establish charge-depleted consumption or a repeat-charging schedule), and 70–75 km Essential measurement with some freeway driving, and warranty (6 years/150,000 km vehicle, 8 years/160,000 km battery): CarExpert review (titled 2026, published 26 September 2025, Essential test car). Extended Range battery (26.6 kWh), nearly 130 km NEDC as approximate reporting, roughly 1000 km combined range, $52,990 Premium Extended Range price and 30 km average commute: WhichCar, 1 September 2025. Variant NEDC ranges (Essential 92 km, Premium Standard 81 km, Premium Extended 128 km, Dynamic Extended 140 km), CCS2 18 kW DC charging: BYD Australia Sealion 6 specification sheet, p.2. SOC setting path, destination-based SOC direction, Intelligent/Compulsory hold (pp.100–101), mode memory (p.102), EV/HEV switch layouts (2WD p.33, 4WD p.35), battery maintenance (p.105) and break-in HEV recommendation (p.108): BYD Australia Sealion 6 owners handbook, 2024. Owner questions on SOC choice and EV-to-HEV engine behaviour (summarised, not quoted): BYD Owners club UK, SOC question, October 2026 and BYD Owners club UK, EV-to-HEV revving question, October 2026. Highway and charged-regularly context: Carscoops Sealion 6 review, November 2025.
