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Some devices, when scanned by the load sensor, cannot be detected. Small fluorescent lights are the most
common example. (Try altering the plug polarity by turning the plug over.) Some computers and
sophisticated electronics have power supplies that do not present a load until line voltage is available. When
this occurs, each unit waits for the other to begin. To drive these loads, either a small companion load must
be used to bring the inverter out of its search mode, or the inverter may be programmed to remain operating
at full output voltage.
2.4.5 Protections
The M Series inverter/charger is equipped with extensive protections against various harsh situations/faults.
These protections include:
⚫ AC Input over voltage protection/AC Input low voltage protection
⚫ Low battery alarm/High battery alarm
⚫ Over temperature protection/Over load protection
⚫ Short Circuit protection (fault after 1s)
When Over temperature /Overload occurs, after the fault is cleared, the master switch has to be reset to
restart the inverter. The inverter will go to over temp protection when the heat sink temp is over 90ºC(194℉)
and will go to Fault (shutdown output) after 30 seconds. After temp drops to 45ºC(113℉), the switch has to
be reset to activate the inverter.
Whenever it triggers protection mode and the fault is cleared, the inverter must be reset to resume work.
2.4.6 Remote Monitoring
The M series inverter can be remotely monitored and controlled.
It supports 4 types of remote monitoring:
1. Plug in the remote LCD panel to the RS485 port. (Applied to ones produced after 2021 May).
2. Connect to a computer via the USB port and monitor the inverter on the software.
3. Plug a Wi-Fi or GPRS module into Wi-Fi port, and monitor it on a computer or cellphone APP.
4. Connect to the RS485 port, it allows users to monitor on their own software programmed with the same
protocol.
To monitor the inverter on a computer, please download the software (SG Solar Power Monitor) from our
website in the Support>Software Download section.
If an extra LCD switch panel is connected to the inverter via “RS485” port, together with the power switch
on the inverter top cover, the two panels will be connected and operated in parallel.
Whichever first switches from “Off” to “On”, it will power the inverter on.
Only when both panels are turned to “Unit Off” position, will the inverter be powered off.
In order for the remote LCD panel to take full control, the inverter box power switch must be in “Off”
position.
⚫ The suggested length between the LCD switch panel and inverter is 20 meters.
⚫ The LCD panel allows users to customize the inverter spec on it.
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