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Earth terminal.
Please read this manual before installing ZCS HYD-ES inverter.
This indicates the degree of protection of the equipment according to IEC standard 70-
1 (EN 60529 June 1997).
Positive pole and negative pole of the DC voltage (PV & Battery).
This side up, HYD-ES inverter must always be transported, handled and stored in such a
way that the arrows always point upwards.