SAJ R5/R6/C6 inverter

Register map(s) for this device, with a note of how far each has been checked. Addresses are 0-based, as on the wire. Scale and byte order are confirmed only at the hardware-verified rung.

coherence-checked

Round-trips through a real Modbus stack with no overlapping addresses and a word-order-sensitive codec — the map is internally coherent and wire-decodable. Does NOT prove byte-order or scaling match a real device: the emulator is seeded from the map's own types, so a uniformly wrong byte-order still round-trips. Only hardware-verified confirms byte-order/scale on the wire.

point	address (0-based)	type	scale	unit
MPVMode	256	U16	1
FaultMSG	257	U16	1
PV1Volt	263	U16	0.1	V
PV1Curr	264	U16	0.01	A
PV1Power	265	U16	1	W
PV2Volt	266	U16	0.1	V
PV2Curr	267	U16	0.01	A
PV2Power	268	U16	1	W
PV3Volt	269	U16	0.1	V
PV3Curr	270	U16	0.01	A
PV3Power	271	U16	1	W
BusVolt	272	U16	0.1	V
InvTempC	273	I16	0.1	℃
GFCI	274	I16	1	mA
Power	275	U16	1	W
QPower	276	I16	1	Var
PF	277	I16	0.001
L1Volt	278	U16	0.1	V
L1Curr	279	U16	0.01	A
L1Freq	280	U16	0.01	Hz
L1DCI	281	I16	1	mA
L1Power	282	U16	1	W
L1PF	283	I16	0.001
L2Volt	284	U16	0.1	V
L2Curr	285	U16	0.01	A
L2Freq	286	U16	0.01	Hz
L2DCI	287	I16	1	mA
L2Power	288	U16	1	W
L2PF	289	I16	0.001
L3Volt	290	U16	0.1	V
L3Curr	291	U16	0.01	A
L3Freq	292	U16	0.01	Hz
L3DCI	293	I16	1	mA
L3Power	294	U16	1	W
L3PF	295	I16	0.001
ISO1	296	U16	1	kΩ
ISO2	297	U16	1	kΩ
ISO3	298	U16	1	kΩ
ISO4	299	U16	1	kΩ
Today Energy	300	U16	0.01	kWh
Month Energy	301	U32BE	0.01	kWh
Year Energy	303	U32BE	0.01	kWh
Total Energy	305	U32BE	0.01	kWh
Today Hour	307	U16	0.1	H
Total Hour	308	U32BE	0.1	H
Error Count	310	U16	1	A
Time	311	U16	1	A
PV1StrCurr1	315	U16	0.01	A
PV1StrCurr2	316	U16	0.01	A
PV1StrCurr3	317	U16	0.01	A
PV1StrCurr4	318	U16	0.01	A
PV2StrCurr1	319	U16	0.01	A
PV2StrCurr2	320	U16	0.01	A
PV2StrCurr3	321	U16	0.01	A
PV2StrCurr4	322	U16	0.01	A
PV3StrCurr1	323	U16	0.01	A
PV3StrCurr2	324	U16	0.01	A
PV3StrCurr3	325	U16	0.01	A
PV3StrCurr4	326	U16	0.01	A
PV4StrCurr1	327	U16	0.01	A
PV4StrCurr2	328	U16	0.01	A
PV4StrCurr3	329	U16	0.01	A
PV4StrCurr4	330	U16	0.01	A
Reserved	331	U16	1
EToday1	2560	U16	0.01	kwh
EToday2	2561	U16	0.01	kwh
EToday3	2562	U16	0.01	kwh
EToday4	2563	U16	0.01	kwh
EToday5	2564	U16	0.01	kwh
EToday6	2565	U16	0.01	kwh
EToday7	2566	U16	0.01	kwh
EToday8	2567	U16	0.01	kwh
EToday9	2568	U16	0.01	kwh
EToday10	2569	U16	0.01	kwh
EToday11	2570	U16	0.01	kwh
EToday12	2571	U16	0.01	kwh
EToday13	2572	U16	0.01	kwh
EToday14	2573	U16	0.01	kwh
EToday15	2574	U16	0.01	kwh
EToday16	2575	U16	0.01	kwh
EToday17	2576	U16	0.01	kwh
EToday18	2577	U16	0.01	kwh
EToday19	2578	U16	0.01	kwh
EToday20	2579	U16	0.01	kwh
EToday21	2580	U16	0.01	kwh
EToday22	2581	U16	0.01	kwh
EToday23	2582	U16	0.01	kwh
EToday24	2583	U16	0.01	kwh
EToday25	2584	U16	0.01	kwh
EToday26	2585	U16	0.01	kwh
EToday27	2586	U16	0.01	kwh
EToday28	2587	U16	0.01	kwh
EToday29	2588	U16	0.01	kwh
EToday30	2589	U16	0.01	kwh
EToday31	2590	U16	0.01	kwh
LEToday1	2591	U16	0.01	kwh
LEToday2	2592	U16	0.01	kwh
LEToday3	2593	U16	0.01	kwh
LEToday4	2594	U16	0.01	kwh
LEToday5	2595	U16	0.01	kwh
LEToday6	2596	U16	0.01	kwh
LEToday7	2597	U16	0.01	kwh
LEToday8	2598	U16	0.01	kwh
LEToday9	2599	U16	0.01	kwh
LEToday10	2600	U16	0.01	kwh
LEToday11	2601	U16	0.01	kwh
LEToday12	2602	U16	0.01	kwh
LEToday13	2603	U16	0.01	kwh
LEToday14	2604	U16	0.01	kwh
LEToday15	2605	U16	0.01	kwh
LEToday16	2606	U16	0.01	kwh
LEToday17	2607	U16	0.01	kwh
LEToday18	2608	U16	0.01	kwh
LEToday19	2609	U16	0.01	kwh
LEToday20	2610	U16	0.01	kwh
LEToday21	2611	U16	0.01	kwh
LEToday22	2612	U16	0.01	kwh
LEToday23	2613	U16	0.01	kwh
LEToday24	2614	U16	0.01	kwh
LEToday25	2615	U16	0.01	kwh
LEToday26	2616	U16	0.01	kwh
LEToday27	2617	U16	0.01	kwh
LEToday28	2618	U16	0.01	kwh
LEToday29	2619	U16	0.01	kwh
LEToday30	2620	U16	0.01	kwh
LEToday31	2621	U16	0.01	kwh
LLEToday1	2622	U16	0.01	kwh
LLEToday2	2623	U16	0.01	kwh
LLEToday3	2624	U16	0.01	kwh
LLEToday4	2625	U16	0.01	kwh
LLEToday5	2626	U16	0.01	kwh
LLEToday6	2627	U16	0.01	kwh
LLEToday7	2628	U16	0.01	kwh
LLEToday8	2629	U16	0.01	kwh
LLEToday9	2630	U16	0.01	kwh
LLEToday10	2631	U16	0.01	kwh
LLEToday11	2632	U16	0.01	kwh
LLEToday12	2633	U16	0.01	kwh
LLEToday13	2634	U16	0.01	kwh
LLEToday14	2635	U16	0.01	kwh
LLEToday15	2636	U16	0.01	kwh
LLEToday16	2637	U16	0.01	kwh
LLEToday17	2638	U16	0.01	kwh
LLEToday18	2639	U16	0.01	kwh
LLEToday19	2640	U16	0.01	kwh
LLEToday20	2641	U16	0.01	kwh
LLEToday21	2642	U16	0.01	kwh
LLEToday22	2643	U16	0.01	kwh
LLEToday23	2644	U16	0.01	kwh
LLEToday24	2645	U16	0.01	kwh
LLEToday25	2646	U16	0.01	kwh
LLEToday26	2647	U16	0.01	kwh
LLEToday27	2648	U16	0.01	kwh
LLEToday28	2649	U16	0.01	kwh
LLEToday29	2650	U16	0.01	kwh
LLEToday30	2651	U16	0.01	kwh
LLEToday31	2652	U16	0.01	kwh
EMonth1	2653	U32BE	0.01	kwh
EMonth2	2655	U32BE	0.01	kwh
EMonth3	2657	U32BE	0.01	kwh
EMonth4	2659	U32BE	0.01	kwh
EMonth5	2661	U32BE	0.01	kwh
EMonth6	2663	U32BE	0.01	kwh
EMonth7	2665	U32BE	0.01	kwh
EMonth8	2667	U32BE	0.01	kwh
EMonth9	2669	U32BE	0.01	kwh
EMonth10	2671	U32BE	0.01	kwh
EMonth11	2673	U32BE	0.01	kwh
EMonth12	2675	U32BE	0.01	kwh
LEMonth1	2677	U32BE	0.01	kwh
LEMonth2	2679	U32BE	0.01	kwh
LEMonth3	2681	U32BE	0.01	kwh
LEMonth4	2683	U32BE	0.01	kwh
LEMonth5	2685	U32BE	0.01	kwh
LEMonth6	2687	U32BE	0.01	kwh
LEMonth7	2689	U32BE	0.01	kwh
LEMonth8	2691	U32BE	0.01	kwh
LEMonth9	2693	U32BE	0.01	kwh
LEMonth10	2695	U32BE	0.01	kwh
LEMonth11	2697	U32BE	0.01	kwh
LEMonth12	2699	U32BE	0.01	kwh
Eyear	2701	U32BE	0.01	kwh
Eyear1	2703	U32BE	0.01	kwh
Eyear2	2705	U32BE	0.01	kwh
Eyear3	2707	U32BE	0.01	kwh
Eyear4	2709	U32BE	0.01	kwh
Eyear5	2711	U32BE	0.01	kwh
Eyear6	2713	U32BE	0.01	kwh
Eyear7	2715	U32BE	0.01	kwh
Eyear8	2717	U32BE	0.01	kwh
Eyear9	2719	U32BE	0.01	kwh
Eyear10	2721	U32BE	0.01	kwh
Eyear11	2723	U32BE	0.01	kwh
Eyear12	2725	U32BE	0.01	kwh
Eyear13	2727	U32BE	0.01	kwh
Eyear14	2729	U32BE	0.01	kwh
Eyear15	2731	U32BE	0.01	kwh
Eyear16	2733	U32BE	0.01	kwh
Eyear17	2735	U32BE	0.01	kwh
Eyear18	2737	U32BE	0.01	kwh
Eyear19	2739	U32BE	0.01	kwh
Eyear20	2741	U32BE	0.01	kwh
Eyear21	2743	U32BE	0.01	kwh
Eyear22	2745	U32BE	0.01	kwh
Eyear23	2747	U32BE	0.01	kwh
Eyear24	2749	U32BE	0.01	kwh
hErrorTime1	2816	U16	1
hError1	2820	U16	1
hErrorTime2	2826	U16	1
hError2	2830	U16	1
hErrorTime3	2836	U16	1
hError3	2840	U16	1
hErrorTime4	2846	U16	1
hError4	2850	U16	1
hErrorTime5	2856	U16	1
hError5	2860	U16	1
hErrorTime6	2866	U16	1
hError6	2870	U16	1
hErrorTime7	2876	U16	1
hError7	2880	U16	1
hErrorTime8	2886	U16	1
hError8	2890	U16	1
hErrorTime9	2896	U16	1
hError9	2900	U16	1
hErrorTime10	2906	U16	1
hError10	2910	U16	1
hErrorTime11	2916	U16	1
hError11	2920	U16	1
hErrorTime12	2926	U16	1
hError12	2930	U16	1
hErrorTime13	2936	U16	1
hError13	2940	U16	1
hErrorTime14	2946	U16	1
hError14	2950	U16	1
hErrorTime15	2956	U16	1
hError15	2960	U16	1
hErrorTime16	2966	U16	1
hError16	2970	U16	1
hErrorTime17	2976	U16	1
hError17	2980	U16	1
hErrorTime18	2986	U16	1
hError18	2990	U16	1
hErrorTime19	2996	U16	1
hError19	3000	U16	1
hErrorTime20	3006	U16	1
hError20	3010	U16	1
hErrorTime21	3016	U16	1
hError21	3020	U16	1
hErrorTime22	3026	U16	1
hError22	3030	U16	1
hErrorTime23	3036	U16	1
hError23	3040	U16	1
hErrorTime24	3046	U16	1
hError24	3050	U16	1
hErrorTime25	3056	U16	1
hError25	3060	U16	1
hErrorTime26	3066	U16	1
hError26	3070	U16	1
hErrorTime27	3076	U16	1
hError27	3080	U16	1
hErrorTime28	3086	U16	1
hError28	3090	U16	1
hErrorTime29	3096	U16	1
hError29	3100	U16	1
hErrorTime30	3106	U16	1
hError30	3110	U16	1
hErrorTime31	3116	U16	1
hError31	3120	U16	1
hErrorTime32	3126	U16	1
hError32	3130	U16	1
hErrorTime33	3136	U16	1
hError33	3140	U16	1
hErrorTime34	3146	U16	1
hError34	3150	U16	1
hErrorTime35	3156	U16	1
hError35	3160	U16	1
hErrorTime36	3166	U16	1
hError36	3170	U16	1
hErrorTime37	3176	U16	1
hError37	3180	U16	1
hErrorTime38	3186	U16	1
hError38	3190	U16	1
hErrorTime39	3196	U16	1
hError39	3200	U16	1
hErrorTime40	3206	U16	1
hError40	3210	U16	1
hErrorTime41	3216	U16	1
hError41	3220	U16	1
hErrorTime42	3226	U16	1
hError42	3230	U16	1
hErrorTime43	3236	U16	1
hError43	3240	U16	1
hErrorTime44	3246	U16	1
hError44	3250	U16	1
hErrorTime45	3256	U16	1
hError45	3260	U16	1
hErrorTime46	3266	U16	1
hError46	3270	U16	1
hErrorTime47	3276	U16	1
hError47	3280	U16	1
hErrorTime48	3286	U16	1
hError48	3290	U16	1
hErrorTime49	3296	U16	1
hError49	3300	U16	1
hErrorTime50	3306	U16	1
hError50	3310	U16	1
hErrorTime51	3316	U16	1
hError51	3320	U16	1
hErrorTime52	3326	U16	1
hError52	3330	U16	1
hErrorTime53	3336	U16	1
hError53	3340	U16	1
hErrorTime54	3346	U16	1
hError54	3350	U16	1
hErrorTime55	3356	U16	1
hError55	3360	U16	1
hErrorTime56	3366	U16	1
hError56	3370	U16	1
hErrorTime57	3376	U16	1
hError57	3380	U16	1
hErrorTime58	3386	U16	1
hError58	3390	U16	1
hErrorTime59	3396	U16	1
hError59	3400	U16	1
hErrorTime60	3406	U16	1
hError60	3410	U16	1
hErrorTime61	3416	U16	1
hError61	3420	U16	1
hErrorTime62	3426	U16	1
hError62	3430	U16	1
hErrorTime63	3436	U16	1
hError63	3440	U16	1
hErrorTime64	3446	U16	1
hError64	3450	U16	1
hErrorTime65	3456	U16	1
hError65	3460	U16	1
hErrorTime66	3466	U16	1
hError66	3470	U16	1
hErrorTime67	3476	U16	1
hError67	3480	U16	1
hErrorTime68	3486	U16	1
hError68	3490	U16	1
hErrorTime69	3496	U16	1
hError69	3500	U16	1
hErrorTime70	3506	U16	1
hError70	3510	U16	1
hErrorTime71	3516	U16	1
hError71	3520	U16	1
hErrorTime72	3526	U16	1
hError72	3530	U16	1
hErrorTime73	3536	U16	1
hError73	3540	U16	1
hErrorTime74	3546	U16	1
hError74	3550	U16	1
hErrorTime75	3556	U16	1
hError75	3560	U16	1
hErrorTime76	3566	U16	1
hError76	3570	U16	1
hErrorTime77	3576	U16	1
hError77	3580	U16	1
hErrorTime78	3586	U16	1
hError78	3590	U16	1
hErrorTime79	3596	U16	1
hError79	3600	U16	1
hErrorTime80	3606	U16	1
hError80	3610	U16	1
hErrorTime81	3616	U16	1
hError81	3620	U16	1
hErrorTime82	3626	U16	1
hError82	3630	U16	1
hErrorTime83	3636	U16	1
hError83	3640	U16	1
hErrorTime84	3646	U16	1
hError84	3650	U16	1
hErrorTime85	3656	U16	1
hError85	3660	U16	1
hErrorTime86	3666	U16	1
hError86	3670	U16	1
hErrorTime87	3676	U16	1
hError87	3680	U16	1
hErrorTime88	3686	U16	1
hError88	3690	U16	1
hErrorTime89	3696	U16	1
hError89	3700	U16	1
hErrorTime90	3706	U16	1
hError90	3710	U16	1
hErrorTime91	3716	U16	1
hError91	3720	U16	1
hErrorTime92	3726	U16	1
hError92	3730	U16	1
hErrorTime93	3736	U16	1
hError93	3740	U16	1
hErrorTime94	3746	U16	1
hError94	3750	U16	1
hErrorTime95	3756	U16	1
hError95	3760	U16	1
hErrorTime96	3766	U16	1
hError96	3770	U16	1
hErrorTime97	3776	U16	1
hError97	3780	U16	1
hErrorTime98	3786	U16	1
hError98	3790	U16	1
hErrorTime99	3796	U16	1
hError99	3800	U16	1
hErrorTime100	3806	U16	1
hError100	3810	U16	1
RS485_DATA_ATE	32788	U16	1
Time	32800	U16	1
Type	36608	U16	1
Sub Type	36609	U16	1
Comm Pro Version	36610	U16	0.001
SN	36611	U16	1
PC	36621	U16	1
DV	36631	U16	0.001
MCV	36632	U16	0.001
SCV	36633	U16	0.001
Disp HW Version	36634	U16	0.001
Ctrl HW Version	36635	U16	0.001
Power HW Version	36636	U16	0.001
RS485_DATA_ATE	36637	U16	1

link settings as documented (unverified): RTU; default 9600 8N1; FC 03,16; UART communication: data bit 8, stop bit 1, no parity check, no flow control. Half duplex.

bench facts as documented (unverified)

terminals	RS232, RS485
wiring notes	Adopts UART half duplex communication mode.
broadcast	supported
model register	8F00H
serial register	8F03H
firmware register	8F17H
doc revision	A

field reports — community-sourced, unverified (checked 2026-06-11)

The active power limit register (0x801F) expects a percentage value scaled by 10 (e.g., 1000 represents 100.0%). Integrations that write a raw percentage value (like 100) will inadvertently limit the inverter to 10% of its rated output. [source]
An issue with active power register readouts on SAJ inverters required a specific fix in third-party telemetry integrations. [source]
An error in how the active power limit percentage was calculated/handled for SAJ inverters required a correction in telemetry controllers. [source]
confirmed: Baud rates [1200, 2400, 4800, 9600, 115200] and default baud rate of 9600 (for RS485) / 115200 (for RS232) — confirmed by SAJ Modbus Communication Protocol document and community integrations
confirmed: Modbus RTU framing with function codes 3 (Read) and 16 (Write Multiple) — confirmed by SAJ Modbus Communication Protocol document
confirmed: UART communication settings (8 data bits, 1 stop bit, no parity, no flow control, half duplex) — confirmed by SAJ Modbus Communication Protocol document
confirmed: Identification registers (model_register 8F00H/36608, serial_register 8F03H/36611, firmware_register 8F17H/36631) — confirmed by SAJ Modbus Communication Protocol document and wimb0/saj_modbus integration
confirmed: Broadcast support on slave address 0 — confirmed by SAJ Modbus Communication Protocol document
confirmed: Real-time data registers (mpv_mode @ 256, pv1_volt @ 263, pv1_curr @ 264, pv1_power @ 265, pv2_volt @ 266, pv2_curr @ 267, pv2_power @ 268, pv3_volt @ 269, pv3_curr @ 270, pv3_power @ 271, bus_volt @ 272, inv_temp_c @ 273, gfci @ 274, power @ 275, q_power @ 276, pf @ 277, l1_volt @ 278, l1_curr @ 279, l1_freq @ 280, l1_dci @ 281, l1_power @ 282, l1_pf @ 283, l2_volt @ 284, l2_curr @ 285, l2_freq @ 286, l2_dci @ 287, l2_power @ 288, l2_pf @ 289, l3_volt @ 290, l3_curr @ 291, l3_freq @ 292) — confirmed by SAJ Modbus Communication Protocol document and Loxone Library templates

The trust ladder

Each rung states what it proved and what it did not. Gray until proven; green is earned by hardware only.

generated — A prompt produced it. Unproven — anyone can regenerate this.
structure-verified — Decode path is structurally sound (addresses, widths, finite values). Does NOT prove word order or scaling.
coherence-checked — Round-trips through a real Modbus stack with no overlapping addresses and a word-order-sensitive codec — the map is internally coherent and wire-decodable. Does NOT prove byte-order or scaling match a real device: the emulator is seeded from the map's own types, so a uniformly wrong byte-order still round-trips. Only hardware-verified confirms byte-order/scale on the wire.
hardware-verified (software-key) x1 — Matched a real device with operator-attested readings as ground truth — the only rung that confirms word order + scaling on the wire.

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