Fronius Inverter State 305 Error Code By Simon Rogers|2024-08-20T16:40:40+10:00July 15th, 2016|All posts, Solar Inverter Fault & Error Messages, Solar power, Solar Power Inverters, Videos| Fronius IG Inverter STATE 305 Issue? We Can Help. As a Fronius service partner we've seen a number of Fronius IG series inverters with STATE 305 Read More