lua-inverterd-client

local inverter = require('inverter')
local json = require('json')

local inv = inverter.create('192.168.1.223', 8305)
local ok, err = inv:connect()

ok, status = inv:exec('get-status')
if not ok then
    print('error: ' .. status)
else
    status = json.decode(status)
    print(status.data.battery_voltage.value .. ' ' .. status.data.battery_voltage.unit)
end