SERVICE & SUPPORT

FAQ

We provide DC Isolation Switch, Miniature Circuit Breaker, DC Surge Protector, Rapid Shutdown, Micro Inverter, Smart Electricity Meter and other components for Solar and Energy Storage System use.

Q：

Is the input and output of our charging pile AC or DC?

A：

Both input and output are AC.

Q：

How RSD realize shutdown?

A：

Overtemperature protection, Emergency stop button shutdown, AC side power loss shutdown.

Q：

How to select String Level RSD?

A：

Fristly select the number of RSD strings according to the number of PV strings, and then select the detailed parameter specifications according to the string voltage and current.

Q：

How many types of RSDs Projoy have? how to distinguish them?

A：

1-2 strings, 3-5 strings, 6-10 strings, each type has a different shell

Q：

What types of Microinverter Projoy can provide?

A：

We have 1-in-1, 2-in-1, 4-in-1, 6-in-1, 4 types of models, output power range cover from 300W to 3000W.

Q：

What is the difference between T2 and T1+T2 for SPD

A：

T1 is mainly for outdoor distribution box,T2 is mainly for indoor distribution box, T1+T2 means that it is suitable for indoor + outdoor.

Q：

How to judge how many inputs and outputs for DC junction box.

A：

For example, PEJB-3-1 represents 3 strings of input and 1 string of output, and multiple string are combined into one, the output current is increased, and the voltage is unchanged.

Q：

What functions does the meter PEEM-S100 have and what communications does it support?

A：

Measurement function and Data transmission function. Support RS485, Bluetooth, WIfi Communication.

Q：

What is the function of shunt release in circuit breaker?

A：

Shunt release is a remotely operated switching attachment. When the power supply voltage is equal to any voltage between 70% and 110% of the rated control power supply voltage, the circuit breaker can be reliably broken.

Q：

What certifications do we have for isolator?

A：

TUV,CB,UL,CE,SAA,TUV+AU,UKCA

Q：

How to select DC isolator?

A：

1.System Voltage The rated operating voltage of DC isolator should be equal to or greater than the system requirements. Common ones meet UL508i, IEC60947-3 600V, 1000V and 1500V. System voltages usually connected to single-phase inverters are up to 600V, and three-phase series inverters or centralized inverters are up to 1000V or 1500V.
2. Number of strings
2-pole - single string, 4-pole - double string, etc.
For inverter built-in DC isolators, the number of MPPT of the inverter determines the pole of the DC isolator.