Warning — the red LED flashes and the inverter keeps running. Deal with it before it escalates.
Also applies to:Axpert MAX II TWIN 8KWAxpert MAX II TWIN 11KWAxpert MAX II TWIN 12KWAxpert MAX II Duplex 8KW+50
Low battery
Cause: Low battery.
Source: Voltronic manual, p.48
Also applies to:InfiniSolar 10KWInfiniSolar 15KWInfiniSolar Super 4KWInfiniSolar Plus 5KW
Line frequency low loss — Warning code 04 flashing on the display: Line frequency low loss.
Cause: Grid frequency is too low.
Source: Voltronic manual, p.51
Battery low — Warning code 04 flashing on the display: Battery low.
Cause: Battery low.
Source: Voltronic manual, p.45
LineFreqHLoss — Warning code 04 flashing on the display: LineFreqHLoss.
Cause: Grid frequency is too high.
Source: Voltronic manual, p.49
Battery low — Warning code 04 flashing on the display: Battery low..
Cause: Battery low.
Recharge or replace the battery.
Source: Voltronic manual, p.71
Also applies to:Giant Elite 3P/3P 10K-40KVA
battery voltage low — Warning code 04 flashing on the display: battery voltage low.
Cause: battery voltage low.
Source: Voltronic manual, p.41
Price incl. VATAED 917
Price incl. VATAED 1,482
Price incl. VATAED 1,585
Price incl. VATAED 1,438
Price incl. VATAED 1,395
Price incl. VATAED 844
It depends on the model — 37 devices use code W04. On the Axpert MAX II TWIN it means: Low battery. The card for each model on this page gives its exact meaning and fix.
W04 is a warning: the red LED flashes and the unit keeps running. Fix the underlying condition before it escalates.
The unit keeps operating. Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre. The exact steps for each affected model are listed on this page.
W04 is in the "Warning" class on the Axpert MAX II TWIN: 9 of the 38 codes documented for it.
All Axpert MAX II TWIN codes All Axpert MAX II Duplex codes All Axpert MAX II codes All Axpert MAX TWIN codes All Axpert MAX E TWIN codes All Axpert MAX E Duplex codes All Axpert MAX codes All Axpert KING II TWIN codes All Axpert KING codes All Axpert MKS IV TWIN codes All Axpert MKS IV codes All Axpert MKS III TWIN codes All Axpert MKS II codes All Axpert VM II codes All Axpert VM II (PF1) codes All Axpert VM III codes All Axpert VM IV TWIN (VM4 TWIN) codes All Axpert KS codes All Axpert V (PF1) codes All Axpert WP TWIN codes All Axpert 3KP/5KP 24V codes All InfiniSolar V II codes All InfiniSolar V II 1.5KW codes All InfiniSolar V II 6KW (Split Phase) codes All InfiniSolar V II WP codes All InfiniSolar V codes All ESS-A510 codes All Galleon One 5KL 48V codes
W04 is in the "Warning" class on the InfiniSolar WP LV 12KW Premium: 19 of the 35 codes documented for it.
All InfiniSolar WP LV 12KW Premium codes All InfiniSolar 10KW codes All InfiniSolar 15KW codes All InfiniSolar Super 4KW codes All InfiniSolar Plus 5KW codes
W04 is in the "Warning" class on the InfiniSolar E 5.5KW: 5 of the 34 codes documented for it.
W04 is in the "Warning" class on the InfiniSolar TX-PA 30KW: 21 of the 76 codes documented for it.
W04 is in the "Warning" class on the ESS510: 10 of the 39 codes documented for it.
W04 is in the "Warning" class on the Giant Elite 3P/3P: 12 of the 25 codes documented for it.
Compiled from official Voltronic user manuals. Always consult your device manual and a qualified technician before performing repairs.