6
1. Drill four holes in the marked locations with four
screws.
2.
Install the unit by screwing four screws. It’s
recommended to use M5 screws.
PV Connection
CAUTION: Before connecting to PV modules, please install separately a DC circuit breaker between inverter
and PV modules. The recommended spec of DC breaker is C16A/2P/750VDC/20KA for 2.2KW LS.
NOTE: It’s required to install PV combiner box when using several PV modules in parallel and series.
PV Module Selection:
When selecting proper PV modules, please be sure to consider below parameters:
1. Open circuit Voltage (Voc) of PV modules not exceeds max. DC voltage (450VDC).
2. Accumulated voltage of connected PV panels should be close to 330V for inverter with 220V output voltage.
To calculate PV module numbers in series (N) and in parallel (M), please follow below formula:
For three-phase output:
Imp>Po/(Kvo x 0.9 x M)
For single-phase output, please use 2 times of PV power rating.
Imp>2 x Po/(Kvo x 0.9 x M)
Po represents the rated output power.
Kvo is equal to 330V/345V/360V for 220V/230V/240V output voltage respectively.
Maximum PV module numbers in series (N) > 330 / Vmp
We strongly recommend the total PV Vmp is around 330Vdc to get the optimum MPPT output.
CAUTION: Important
Before making PV connection, be sure to do the following actions to prevent human injury or machine damage.
1. It’s required to turn off circuit breaker.
2. Make sure connect positive pole (+) of PV input connector in inverter to positive pole (+) of PV modules and
negative pole (-) of PV input connector in inverter to negative pole (-) of PV modules.
