AbieHeymans

Nope, + to Positive and - to Negative, and still no display. Will disconnect and return it to the supplier on Monday for a swap-out.

Morning I bought a Mecer/ AXPERT SOL-I-AX-5M4 inverter and M3000 ESS Lithium Ion Battery. Did the Installation and connect the inverter to the AC Power and switched it on. All came up and LCD screen light up. Switched the unit off and connect the battery via the 25mmsq Battery cables, connected the earth cable between the Battery, Inverter and Distribution Board. Then switched the Battery on, and then the Inverter. The Inverter Started up, battery seems to start charging as well, however no display on the Inverter LCD panel. I switched off the Mains Power, and the system took the load and all seems to work fine, still no LCD Display. Still need to change some parameters on the Inverter. After a while, I assume that when the battery were fully charged the system trip / loose power and start-up again, trip and start up again - then I switched it off. Any idea what I missed or did wrong? Your assistance will be appreciated. Thanks Abie