Sonnen sonnenBatterie eco 7.0 Series, Operation And Installation Instructions Manual, Page: 59 / 115

Electrical connection 6
6.7.6 Connecting the DC lines
Risk of fire due to high contact resistances and short circuit!
Incorrectly connected DC lines can cause a short circuit and thus high heat
generation. Improperly connected DC lines can also create high resistance at the
point of contact. As very high currents flow through the DC circuit, this high
contact resistance can lead to great loss of energy (electrical energy is converted
into heat). This can have the following effects:
• Cable fire:
The area around the affected point of contact is heated above permissible
temperatures. A fire breaks out and hazardous substances are released.
• Damage to the battery modules:
The high contact resistance generates various high battery module loads. Battery
modules may be damaged or destroyed by this. Therefore, proceed as follows:
►
Check all plug connections. Only red lines are allowed to be plugged into red
sockets. Only black lines are allowed to be plugged into black sockets.
Figure 40:
Correctly connected (top) and
incorrectly connected (bottom) DC line
►
Ensure that all DC lines are
plugged into the sockets all the way.
Danger to life due to electrocution if DC lines are incorrectly connected!
Each battery module has a nominal voltage of 51.2 volts. The battery modules are
connected in parallel using the supplied DC lines. The battery modules must never
be connected in series, as this could result in life-threatening high voltages from
the series connection. The high voltage can also lead to damage/destruction of
components.
►
Ensure that all battery modules are connected in parallel, i.e. all plus poles of
the battery modules are connected together (red to red). Likewise, ensure that all
minus poles of the battery modules are connected together (black to black).
KD-262 | Part-No 52199 | EN | Version 1.00 Page 59 of 115
CAUTION
DANGER
WARNING
Notice
CAUTION
DANGER
WARNING
Notice