SUN-2000G eModbus (from Github) :
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#define REGISTRY_DEVICE_ID               3     // 10 chars; registers 3,4,5,6,7
#define REGISTRY_CUSTOM_ENERGY_COUNTER  60     // 2 bytes 
#define REGISTRY_TOTAL_ENERGY_COUNTER   63     // 2 bytes 
#define REGISTRY_AC_VOLTAGE             70     // 2 bytes
#define REGISTRY_AVERAGE_POWER          86     // 2 bytes
#define REGISTRY_DC_VOLTAGE            109     // 2 bytes

SUN-1000G Modbus28Rtu
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1:0x03,0x00,0x00,0x00,0x01/3,1,999.0,1.0/nr,type of device BCD
2:0x03,0x00,0x01,0x00,0x01/3,1,999.0,1.0/nr,address of device BCD
3:0x03,0x00,0x02,0x00,0x01/3,1,999.0,1.0/,nr,version of protocol BCD
4:0x03,0x00,0x03,0x00,0x05/2,0,Ansi,1.0/nr,SN Number in ASCII
5:0x03,0x00,0x2B,0x00,0x01/1,0,999.0,0.01/V ?,x2B(43) AC internal voltage half?
6:0x03,0x00,0x3C,0x00,0x01/1,0,999.0,1.0/kW ?,x3C(60) power daily average?
7:0x03,0x00,0x3F,0x00,0x01/1,0,999.0,1.0/V ?,x3F(63) AC internal voltage?
8:0x03,0x00,0x45,0x00,0x01/1,0,999.0,1.0/nr ?,x45(69) not used ?
9:0x03,0x00,0x46,0x00,0x01/1,0,999.0,0.1/V,x46(70) Grid Volts
10:0x03,0x00,0x56,0x00,0x01/1,0,999.0,1.0/W,x56(86) power average
11:0x03,0x00,0x6D,0x00,0x01/1,0,999.0,0.1/V,x6D(109) PV Voltage

Fornats : ..command.. / 0=bytes 1=integer 2=Ascii 3=BCD 4=float, byte order 0=nomal 1=reversed , range , real factor / unit, description

Transfer bytes on hexbytes
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	003  	0x03
	043  	0x2B  
	060  	0x3C
	063  	0x3F
	070  	0x46
	086  	0x56
	109  	0x6D