Table 2.

Charging modes of conductive charging devices [[36], [37], [38]].

AC/DC	Levels for charger	Maximum voltage	Maximum current	Power Level	Estimated charging time
STANDARDS OF SAE
AC	Level I (On-board)	120 V (US), 230 V (EU)	20 A 12 A	1.9 KW 1.4 KW	7–17 h
AC	Level II (On-board)	240 V (US), 400 V (EU)	32 A 80 A	8 KW 19.2 KW	0.4– – 7 h
DC	Level I (Off-board)	(200–450) V	80 A	40 KW	0.4–1.2 h
DC	Level II (Off-board)	(200–600) V	200 A	90 KW	0.2–0.4 h
DC	Level III (Off-board)	(200–600) V	400 A	240 KW	0.1–0.2 h
STANDARDS OF IEC
AC	Level I (On-board)	1$\varnothing \text{,}$ 250 V	16 A	4–7.5 KW	7 h
		3$\varnothing \text{,}$ 480 V,	16 A
AC	Level II (On-board)	1$\varnothing \text{,}$ 250 V	32 A	8–15 KW	3 h
		3$\varnothing \text{,}$ 480 V	32 A
AC	Level III (On-board)	480 V	250 A	60–120 KW	30 min
DC	Level IV (Off-board)	500 V	400 A	1000–2000 KW	<0.1 h
STANDARDS OF GB/T STANDARDS
AC	Level 1	1$\varnothing \text{,}$ 250 V	8 A	27.7 KW	1.5 h–8 h
AC	Level II	1$\varnothing \text{,}$ 250 V	16 A
AC	Level III	1$\varnothing \text{,}$ 250 V	32 A
		$3\varnothing \text{,}$ 440 V	63 A
DC	Level IV	750 V, 1000 V	250 A	250 KW	<0.1 h