7 Electrical Connection
SMA Solar Technology AG
Operating Manual
STPx0-3SE-40-BE-en-10
56
NOTICE
Destruction of the inverter due to overvoltage
If the open-circuit voltage of the PV modules exceeds the maximum input voltage of the inverter,
the inverter can be destroyed due to overvoltage.
• If the open-circuit voltage of the PV modules exceeds the maximum input voltage of the
inverter, do not connect any strings to the inverter and check the design of the PV system.
For connection to the inverter, all PV module connection cables must be fitted with the DC
connectors provided. Assemble the DC connectors as described in the following. The procedure is
identical for both connectors (+ and -). The graphics for the procedure are shown for only the
positive connector as an example. Pay attention to the correct polarity when assembling the DC
connectors. The DC connectors are marked with the symbols "+" and "-".
Figure 18: Negative (A) and positive (B) DC connectors
Cable requirements:
☐ External diameter: 5.5 mm to 8 mm
☐ Conductor cross-section: 2.5 mm² to 6 mm²
☐ Qty single wires: minimum 7
☐ Nominal voltage: minimum 1000 V
☐ Using bootlace ferrules is not allowed.
Procedure:
1. Strip approx. 15 mm of the cable insulation.
2. Insert the stripped cable into the DC connector up to
the stop. When doing so, ensure that the stripped
cable and the DC connector are of the same
polarity.
+
3. Press the clamping bracket down until it audibly
snaps into place.
+
Summary of Contents for SUNNY TRIPOWER 10.0 SMART ENERGY
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