must/docs/protocol/PH1800-PV1800-EP1800-PV3500-EP3500-RS485-Modbus-RTU-Protocol-1.4.15.md

MUST PV1800 register map (extracted from protocol v1.4.15)

Source: PH1800-PV1800-EP1800-PV3500-EP3500-RS485-Modbus-RTU-Protocol-1.4.15.xlsx (in this same directory). Extracted with openpyxl.

The XLSX is authoritative; this Markdown rendering exists so you can grep / diff / read it without Excel.

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Sheet: Sheet1

Address	Type	Name	Unit / Values

Sheet: Sheet2

Address	Type	Name	Unit / Values

Sheet: Inverter modbusRTU (ID == 4)

Address	Type	Name	Unit / Values
20000	RO	The type of machine High	PH/EP/PV
20001	RO	The type of machine Low	1800/3000
20002	RW	Serial number High
20003	RW	Serial number Low
20004	RO	Hardware version	1.00.00
20005	RO	Software version	1.00.00
20006	RO	Communication Protocal Edition	1.00.00
20009	RW	Battery voltage calibration coefficient	16384
20010	RW	Inverter voltage calibration coefficient	16384
20011	RW	Grid voltage calibration coefficient	16384
20012	RW	Bus voltage calibration coefficient	16384
20013	RW	Control Current calibration coefficient	16384
20014	RW	Inverter Current calibration coefficient	16384
20015	RW	Grid Current calibration coefficient	16384
20016	RW	Load Current calibration coefficient	16384
20101	RW	Inverter offgrid work enable	0：OFF 1：ON
20102	RW	Inverter output voltage Set	220.0V-240.0V
20103	RW	Inverter output frequency Set	50.00Hz/60.00Hz
20104	RW	Inverter search mode enable	0：OFF 1：ON
20108	RW	Inverter discharger to grid enable	48V: 0：OFF 1：ON 24V: Null
20109	RW	Energy use mode	48V:1:SBU;2:SUB;3:UTI;4:SOL (for PV;PH) 1:BAU; 3:UTI;4:BOU (for EP) 12V 24V:1:SBU;;3:UTI;4:SOL (for PV;PH) 1:BU; 3:UTI (for EP)
20111	RW	Grid protect standard	0：VDE4105; 1：UPS ; 2：home ;3:GEN
20112	RW	SolarUse Aim	0:LBU 1:BLU(defalut)(for PV;PH) 0:LB 1:LU(defalut) (for EP)
20113	RW	Inverter max discharger current	48V: 0.1A（AC） 12V 24V: Null
20118	RW	Battery stop discharging voltage	0.1V
20119	RW	Battery stop charging voltage	0.1V
20125	RW	Grid max charger current set	0.1A(DC)
20127	RW	Battery low voltage	0.1V
20128	RW	Battery high voltage	0.1V
20132	RW	Max Combine charger current	0.1A(DC)(for PV;PH)
20142	RW	System setting
20143	RW	Charger source priority	0:Soalr first (for PV;PH) 2:Solar and Utility(default) (for PV;PH) 3:Only Solar (for PV;PH) 2:Utility charger enable (default) (for EP) 3:Utility charger disable (for EP)
20144	RW	Solar power balance	0:SBD 1:SBE
20213	RW	Remove the accumulated data	0：No remove the accumulated data 1：Remove the accumulated data
20214	RW	Reset the parameter	0：No effect 1：Action
25201	RO	work state	0:PowerOn 1:SelfTest 2:OffGrid 3:Grid-Tie 4:ByPass 5:Stop 6:Grid charging
25202	RO	AC voltage grade	230:230V 120:120V
25203	RO	Rated power(VA)	VA
25204	RO	reserved
25205	RO	Battery voltage	0.1V
25206	RO	Inverter voltage	0.1V
25207	RO	Grid voltage	0.1V
25208	RO	BUS voltage	0.1V
25209	RO	Control current	0.1A
25210	RO	Inverter current	0.1A
25211	RO	Grid current	0.1A
25212	RO	Load current	0.1A
25213	RO	PInverter	1W
25214	RO	PGrid	1W
25215	RO	PLoad	1W
25216	RO	Load percent	0.01
25217	RO	SInverter	1VA
25218	RO	SGrid	1VA
25219	RO	Sload	1VA
25220	RO	reserved
25221	RO	Qinverter	1var
25222	RO	Qgrid	1var
25223	RO	Qload	1var
25224	RO	reserved
25225	RO	Inverter frequency	0.01Hz
25226	RO	Grid frequency	0.01Hz
25227	RO	reserved
25228	RO	reserved
25229	RO	Inverter max number
25230	RO	Combine type
25231	RO	Inverter number
25232	RO	reserved
25233	RO	AC radiator temperature	1℃
25234	RO	Transformer temperature	1℃
25235	RO	DC radiator temperature	1℃
25236	RO	reserved
25237	RO	Inverter relay state	0: Disconnect 1:Connect
25238	RO	Grid relay state	0: Disconnect 1:Connect
25239	RO	Load relay state	0: Disconnect 1:Connect
25240	RO	N_Line relay state	0: Disconnect 1:Connect
25241	RO	DC relay state	0: Disconnect 1:Connect
25242	RO	Earth relay state	0: Disconnect 1:Connect
25243	RO	reserved
25244	RO	reserved
25245	RO	Accumulated charger power high	1000KWH
25246	RO	Accumulated charger power low	0.1KWH
25247	RO	Accumulated discharger power high	1000KWH
25248	RO	Accumulated discharger power low	0.1KWH
25249	RO	Accumulated buy power high	1000KWH
25250	RO	Accumulated buy power low	0.1KWH
25251	RO	Accumulated sell power high	1000KWH
25252	RO	Accumulated sell power low	0.1KWH
25253	RO	Accumulated load power high	1000KWH
25254	RO	Accumulated load power low	0.1KWH
25255	RO	Accumulated self_use power high	1000KWH
25256	RO	Accumulated self_use power low	0.1KWH
25257	RO	Accumulated PV_sell power high	1000KWH
25258	RO	Accumulated PV_sell power low	0.1KWH
25259	RO	Accumulated grid_charger power high	1000KWH
25260	RO	Accumulated grid_charger power low	0.1KWH
25261	RO	Error message 1
25262	RO	Error message 2
25263	RO	Error message 3
25264	RO	reserved
25265	RO	Warning message 1
25266	RO	Warning message 2
25267	RO	reserved
25268	RO	reserved
25269	RO	Serial number High
25270	RO	Serial number Low
25271	RO	Hardware version	1.00.00
25272	RO	Software version	1.00.00
25273	RO	Batt power	W
25274	RO	Batt current	A
25275	RO	Batt voltage grade	48:48V 24:24V 12:12V
25276		reserved
25277	RO	Rated power(W)	W
25278	RO	Communication Protocal Edition	1.00.00
25279	RO	Arrow Flag	bit

Sheet: Inverter Alarm

Address	Type	Name	Unit / Values

Sheet: PV Charger ModbusRtu (ID == 4)

Address	Type	Name	Unit / Values
10001	RO	The type of machine	PC1600
10002	WR	Serial number High
10003	WR	Serial number Low
10004	RO	Hardware version	1.0.00
10005	RO	Software version	1.0.00
10006	WR	PV voltage calibration coefficient	16384
10007	WR	Battery voltage calibration coefficient	16384
10008	WR	Charger current calibration coefficient	16384
10103	WR	Float voltage	0.1V
10104	WR	Absorption voltage	0.1V
10105	WR	Battery low voltage(for PV;PH)	0.1V
10106	WR	reserved
10107	WR	Battery High voltage(for PV;PH)	0.1V
10108	WR	PV max charger current(for PV;PH)	0.1A
10110	WR	Battery type	0:no choose 1:Use defined battery 2:lithium battery 3:SEALED_LEAD battery 4:AGM battery 5:GEL battery 6:FLOODED battery
10111	WR	Battery AH	1AH
10112	WR	Remove the accumulated data	0：No remove the accumulated data 1：Remove the accumulated data
10118	WR	Battery equalization enable	0:Disable 1:Enable
10119	WR	Battery Equalization voltage	0.1V
10120	WR	reserved	reserved
10121	WR	Battery equalized time	1min
10122	WR	Battery Equalized timeout	1min
10123	WR	Equalization interval	1day
10124	WR	Equalization actived immediately	0:No effect 1:Action
15201	RO	Charger workstate	0：Initialization mode 1：Selftest Mode 2: Work Mode 3：Stop Mode
15202	RO	Mppt state	0：Stop 1：MPPT 2: Current limiting
15203	RO	charging state	0:Stop 1:Absorb charge 2: Float charge 3:EQ charge
15204	RO	reserved
15205	RO	PV voltage	0.1V
15206	RO	Battery voltage	0.1V
15207	RO	Charger current	0.1A
15208	RO	Charger power	1W
15209	RO	Radiator temperature	1℃
15210	RO	External temperature	1℃
15211	RO	Battery Relay
15212	RO	PV Relay
15213	RO	Error message	Refer to frame Charger Error message 1
15214	RO	Warning message	Refer to frame Charger Warning message 1
15215	RO	BattVol Grade	1V
15216	RO	Rated Current	0.1A
15217	RO	Accumulated PV power high	1000KWH
15218	RO	Accumulated PV power low	0.1KWH
15219	RO	Accumulated day	1day
15220	RO	Accumulated hour	1hour
15221	RO	Accumulated minute	1minute

Sheet: PV Charger Alarm

Address	Type	Name	Unit / Values