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8 Electrics and electronics
8.2
Electromagnetic compatibility (EMC)
ⓘ
You can find information on this topic in the chapter
of the same name in the Body-Equipment-Guideline
for Sprinter Vans.
8.3
Battery
The vehicle has two separate on-board electrical
systems:
• A 12 V on-board electrical system for supplying
factory installed consumers. When the vehicle
is stationary with the ignition off, all the factory
installed consumers are supplied by the 12 V
on-board electrical system battery.
• A high-voltage on-board electrical system (400 V)
for the vehicle drive.
When the ignition is switched on, the existing volt-
age from the on-board electrical system battery is
checked and, as required, charged or boosted by the
high-voltage battery via a DC/DC converter. Factory
installed consumers continue to be supplied by the 12
V on-board electrical system battery.
8.3.1
12 V on-board electrical system battery
The 12 V on-board electrical system battery for sup-
plying the factory installed consumers is located in the
battery box in the center of the front area of the vehicle
floor. When the vehicle is started, the high-voltage
on-board electrical system is activated after a prior test
carried out by the energy and battery management sys-
tems. The 12 V on-board electrical system, including
the 12 V battery, is boosted and, if necessary, charged
by a DC/DC converter that generates the charging volt-
age from the high-voltage on-board electrical system.
The following on-board electrical system batteries
are available ex factory depending on the equipment
(model AGM):
Series/optional
Code
Series
ED1
Optional
ED4
In the event of high electricity demand and power
tapping for additional electrical consumers, use an aux-
iliary battery, see chapter 8.3.2 12 V auxiliary battery
(→ page 43).
42
Mercedes-Benz | Supplemental Guideline for eSprinter – Model Series 907, Edition 2023-8
Size
Capacity
[Ah]
H6
70
H8
92
⑴ NOTE
The state of charge of the 12V Battery ED1 (optional
ED4) is monitored and gets recharged automatically
by the 400V High Voltage battery utilizing a DC/DC
converter.
It is not permitted to utilize ED1 or ED4 for powering
aftermarket electrical consumers while the High Volt-
age system is disengaged. (Vehicle is "Off").
⑴ NOTE
For the "Start/Stop" button functionality please
review the operators manual.
Charging the on-board electrical system battery
through external feed-in
⑴ NOTE
External feed-in to the 12 V on-board electrical
system battery is permissible as per the Operator's
Manual only in a qualified specialist workshop.
Permanent connection of an external feed in to the
12V on board electrical system is not permitted.
Electrical aftermarket consumers are not permitted
to be connected directly to the on-board battery.
If an Upfitter would like to utilize the on-board battery
to power aftermarket consumers the terminals of EK1
have to be utilized.
ⓘ
You can find further information on this topic in
the chapter of the same name in the Body-Equip-
ment-Guideline for Sprinter Vans.
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