Bosch BPT-S 5 Hybrid Installation Manual page 165

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DANGER
DANGER
Bosch Power Tec GmbH
Risk of fatal injury: Solar generator
Risk of fatal injury due to high voltages
In photovoltaic systems, high voltages and high
currents can occur, even when all specifications are
observed. Attempting to work on the device and live
components at these high voltages and current
strengths can prove fatal. When performing work of
this nature, please note that the photovoltaic
system's solar generator is always active during
daylight hours.
Before starting any work on electrical systems:
Disconnect the system

Ensure that it is secured against being switched

back on
 Verify that the system is fully de-energised
Earth and short-circuit the system

Cover or shield any adjacent live components

Risk of fatal injury due to earthed solar generator
In typical applications, which many engineers would
expect to encounter, the solar generator is structured
like an insulated grid and is not earthed.
A earthed solar generator, on the other hand,
behaves like a TN grid. This can cause engineers to
reach decisions under false assumptions when
detecting residual currents (earth faults), which in
turn can have potentially life-threatening
consequences.
Clearly mark earthed solar generators

Only implement the earthing using clearly labelled

switching and safety devices
Safety | 21
Storage system | Installation manual