EG4 6000XP User Manual

17
5.8 WORKING WITH A GENERATOR
5.8.1 GENERATOR SYSTEM CONNECTION
The EG4 6000XP can utilize a generator for backup power in the case of Grid failure. When sizing
generators to provide both adequate power and frequency, keep in mind that the THD (Total Harmonic
Distortion) of the generator must be <3%. It is a good rule of thumb to size the generator for at least
1.5x the output of the inverter to allow for powering loads and charging batteries. The table listed
below shows the recommended generator capacity for optimal operations.
When properly wired and configured, the generator, if compatible with remote start, will start
automatically when the battery voltage/SOC is lower than the cut-off value or there is a charge request
from the BMS. When the generator is running, it will charge the batteries and excess AC power will be
diverted to the AC output (LOAD) to power loads. The pass-through relay on the inverter’s generator
terminal (GEN) is 30A. When the generator is on, please ensure the total load and charge current does
not exceed 30A.
5.8.2 INTEGRATED TWO-WIRE START/STOP
This inverter has 2 two-wire start/stop contact connections that can be used to remotely
enable external devices such as a generator. The Dry Port (NO2, COM2) can be used to
remotely enable an external device when the battery voltage reaches a pre-set warning
level. Similarly, the GEN Port (NO1, COM1) can be used to remotely start a generator. To do so,
the generator start signal must be connected to the inverter GEN contacts, NO1 and COM1.
The following table shows the ports’ status under various system conditions.
Number of Inverters in Parallel Generator Capacity
1
>10kW
2
>15kW
3
>20kW
4
>25kW
Inverter
Status
Condition
Dry Port
Status
GEN Port
Status
Power O Inverter is o and no output is powered Open Open
Power On
Without Grid
Battery Voltage/SOC < Generator
Charge Start Voltage/SOC
Closed Closed
Battery Voltage/SOC > Generator
Charge Stop Voltage/SOC
Open Open
With Grid
Battery Voltage/SOC < Generator
Charge Start Voltage/SOC
Closed Open
Battery Voltage/SOC > Generator
Charge Stop Voltage/SOC
Open Open
NOTE:
If running more than one inverter in the system, the generator must be wired
to provide power to every inverter running in parallel for the inverters to function as
intended.
REMINDER:
NO = Normally Open, COM = Common
Dry Port and GEN relay maximum specification: 250VAC, 5A

EG4 6000XP Specifications

General

Nominal DC Voltage	48V
Maximum DC Voltage	500V
Maximum Continuous Output Power	6000W
Frequency	60Hz
Model	EG4-6000XP
Peak Power	12000W
Protection Features	Over Voltage, Over Load, Over Temperature, Short Circuit
Cooling	Fan