Look for a screen light or status LED on the inverter/battery. If blank, check the solar/battery switches & the relevant circuit breaker in the switchboard.
It supports multi-parallel connection and is compatible with three-phase four-wire power grids, meeting the requirements for high power, large capacity, high reliability, and high adaptability in energy storage applications.
For a 6V battery, a solar panel with an output of around 6V to 12V is ideal. Ensure that the panel's wattage is sufficient to meet the charging needs of your battery based on its size and capacity.
This includes an initial voltage check after charging, investigating individual cell groups, assessing cell health, testing under load conditions, and monitoring self-discharge. You can also use a multimeter to check internal resistance.
However, in general, a 3kW solar system would on average produce around 12kWh (kiloWatt-hours) of energy per day, which amounts to about 360 kWh of energy per month, and 4400 kWh of energy per year.