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As described in section 4.4, the inverter provides an USB interface that is only
used to upgrade the LCD program.
To upgrade the probram, according to the liquid crystal process described in the
previous section, find the LCD program upgrade page, insert the storage device with
new program, move the cursor to the "LCD Upgrade" position directly click on the
LCD, it will automatically complete the upgrade. The program writing process lasted
for about 2 minutes.
7 Working mode specification
According to the different lighting and power supply, the inverter will work in
several different modes. Overall, the "uninterrupted peak load Valley" and the
"uninterrupted" power supply of the household important load are realized.
Mode 1: when the sunshine is
sufficient during the day, the PV
is given priority to the
important load, then the surplus
energy is stored into the
battery, and finally the energy
is supplied to the state grid.
Mode 2: when there is no PV
energy, the battery will priority
discharge to the load. When the
battery is short of energy, load
will get electricity from the
grid.
Mode3 : When the state grid is
in fault,PV and battery can
power to home load,to achieve
the
“
off-grid
”
function.
