Max.PV Input: 4000W,450V,13A solar inverter: [ Ссылка ]
12V LiFePO4 Battery 200Ah (2Pack 100Ah): [ Ссылка ]
Max.PV Input: 1600W,108V, 40A solar inverter: [ Ссылка ]
Error code 03: Battery not connected alarm.
1、Battery not connected.
2、Lithium battery BMS protection.
（Please check the fuse area first. The fuse is likely burnt. If it is, please replace the fuse and then only connect the battery for startup testing. If there is no problem, then connect to other devices.）
Please follow the steps below to troubleshoot and take a video to the seller.
Troubleshooting：
Step 1. Check whether the battery is connected properly. If still a problem, go for step 2.
Step 2. Check whether the boat switch is not open (ON-open). If everything is ok, go for step 3.
Step 3. The lithium battery may be in a protected state, the 08 parameters set to lithium battery mode, connected to the photovoltaic panel or utility, and charging to activate the battery. If everything is ok, go for step 4.
Step 4. Power-off operation, disconnect the battery side of the machine access and use a multimeter alone to measure the battery to see if there is voltage. (Check whether the voltage is in line with the machine's demand voltage?). If everything is ok, go for step 5.
Step 5. Power off and restart the machine. (Confirm that the machine display screen then starts the machine)
