Fronius — Primo GEN24 / Symo GEN24 / Verto / Tauro
Solar Inverter · Tap each step to mark complete
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Pre-Energisation Checks
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Verify DC string fuses and DC isolator installed — confirm rating matches string short-circuit current
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Check polarity on each string with clamp meter before connecting — confirm positive/negative correct
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Verify DC cable sizing — minimum 4mm² for string currents up to 15A
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Confirm AC isolator installed within 3m of inverter (AS/NZS 5033 cl. 4.3.4)
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Verify MCB and RCD protection at switchboard — MCB rated correctly for inverter AC output
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Check inverter mounting clearances — 300mm top, 200mm sides, 100mm bottom
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Confirm frame earth connected — green/yellow conductor to earth bar at switchboard
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Check all DC terminal torques to Fronius spec — Primo: DC 1.8 Nm, AC 2.2 Nm
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Inspect AC and DC wiring for damage, chafing, or unsupported runs
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First Power-Up
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Enable AC isolator at switchboard
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Enable DC isolator on inverter — left-side rotary switch, turn clockwise to ON
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Wait 60–90 seconds for inverter to initialise — do not touch controls during startup
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Confirm status: green LED = starting, flashing green = checking grid, solid green = generating
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If fault code appears on display, note the code and check error code table below before proceeding
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Inverter Configuration
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Connect phone/tablet to inverter WiFi — SSID 'FRONIUS_XXXXXXXX' (label on inverter side panel)
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Open browser → navigate to 192.168.250.181
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Run Setup Wizard: Settings → Setup Wizard
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Set country/grid standard: Australia → AS4777.2 — do not select any other standard
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Set export limit if required — confirm DNSP requirements before setting (options: 0W, 1.5kW, 5kW, unlimited)
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Set correct timezone: Australia/Melbourne, Australia/Brisbane, Australia/Adelaide, etc.
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Connect to customer's home/business WiFi: Settings → WLAN → scan and connect
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Create or link Solar.web account: Settings → Solar.web → Activate
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Set the Technician (installer) password — there is no factory default; record it in commissioning notes
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Confirm inverter shows 'Feed-in' or 'Throttled' status on display before leaving
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Testing & Sign-Off
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Verify generation visible on Solar.web or local display — confirm DC voltage and power output reading
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Test AC isolator: turn off, confirm inverter shuts down cleanly, re-enable, confirm restart
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Record all system details: serial number, string config, array size (kWp), panel tilt and azimuth
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Photograph inverter display showing operating mode and generation output
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Photograph DC and AC isolators in installed position with labels visible
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Photograph meter box showing meter type and DNSP labels
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Complete commissioning certificate with all system details and sign
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Show customer the Solar.web app and confirm they can see live generation
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DNSP Notification
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Identify customer's DNSP — check meter box for distributor label, or search by postcode on AEMO website
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VIC — AusNet: B2B notification required before energisation for systems >5kW. Submit via AusNet portal
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VIC — Jemena: submit DNES form or B2B notification via Jemena Connect portal
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VIC — United Energy: complete notification form at unitedenergy.com.au/connections
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NSW — Ausgrid / Endeavour / Essential Energy: complete connection agreement online at respective portal
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QLD — Energex / Ergon: submit B2B service order — small systems (<10kW) auto-approved
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SA — SA Power Networks: online notification required for all systems, submit before energisation
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WA — Western Power: notification required, submit via Western Power's approved contractor portal
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Confirm customer has bi-directional smart meter installed — if not, advise retailer to arrange meter upgrade
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Provide customer with copy of commissioning certificate and Solar.web login details
⚠ Error Codes & Fault Fixes
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102
AC voltage too high — grid voltage above AS4777 window at the terminals
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→ Measure grid voltage at AC terminals; check volt rise on the AC run; contact DNSP if persistent
103
AC voltage too low — grid voltage below the AS4777 window
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→ Measure grid voltage; check AC connections and upstream supply; contact DNSP if persistent
105
AC frequency out of range
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→ Usually transient grid instability — monitor for 15 minutes; if persistent, contact the DNSP
107
No AC grid detected — inverter cannot see the grid
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→ Check AC isolator fully ON, MCB at switchboard, AC cable connections at inverter
301
AC overcurrent
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→ Check the AC-side wiring and connected load; restart — if it recurs, log a Fronius Solar.SOS case
302
DC overcurrent
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→ Check string configuration against the inverter DC limits; verify no string mis-parallel
501
Inverter overtemperature — insufficient ventilation or ambient too high
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→ Check mounting clearances are met; ensure inverter not in direct sun with no airflow; check fins are clear
1001
Insulation fault (GEN24) — low DC isolation resistance
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→ Isolate DC strings one at a time to find the faulty string; inspect panels and DC cables for damage
475 / 502
Insulation fault — low DC isolation resistance (SnapINverter)
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→ Isolate DC strings one at a time; inspect panels and DC cables. Installer support: (03) 8340 2910
567
Grid-voltage-dependent power reduction active (volt-watt response)
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→ Not a fault — the inverter is throttling per AS4777.2. Persistent throttling = high grid voltage; check volt rise / notify DNSP