Solis S6-EH3P50K-H

Compatibility

Compatible with EpiSensor Edge over Modbus RTU and Modbus TCP

The European manual assigns the EMS connection to third-party RS-485 devices, and the public Solis hybrid protocol Ver3.5 gives addresses, data formats and timing for S6 high-voltage 29.9–150 kW units. Edge reads the EMS port over Modbus RTU through a ZMB-31 or the Gateway's serial port, or an S2-WL-ST logger over Modbus TCP.

European S6-EH3P50K-H under manual V1.2, 21 August 2025, 380/400 V three-phase with neutral. Site check: read register 35000 and compare the first frequency and SOC reads with the display. Excludes LV, 21A, ND/AU and larger K10 electrical variants; keep meter, BMS and inverter-master connections in their assigned roles.

Connect it with

• Modbus Interface ZMB-3X From €399 ex VAT Configure
• Gateway ZGW-20 From €899 ex VAT Configure
• Evaluation Gateway on a Raspberry Pi Edge with one device licensed Free Set up

Models

Specifications

The global V3.8 datasheet and European V1.2 manual establish a 50 kW commercial hybrid scope. The datasheet distinguishes 100 kW recommended PV array capacity from 96 kW maximum usable PV power; neither is a 100 kW AC output rating.^1, 2

AC rating

50 kW, 380/400 V three-phase with neutral²

PV inputs

Four MPPTs, eight strings; 1000 V maximum DC²

PV power

100 kW recommended array; 96 kW maximum usable input²

Battery

Two ports; 150–800 V; 70 A per port in retained V3.8 datasheet²

Backup

50 kW rated; 1.6 times overload for 2 seconds²

Enclosure

IP66; -25 to +60°C; intelligent fan cooling²

Dimensions and weight

530×880×290 mm; 73 kg²

Protocol access

Public hybrid protocol Ver3.5 with S6 29.9–150 kW family identification^5, 6

Interface

Documented measurements and integration boundaries for S6-EH3P50K-H.

• The inverter provides local PV, battery and AC operating information through its screen and supported monitoring arrangement.
• The public hybrid map gives FC04 frequency 33094, battery 1 SOC 33139, PV power 33057–33058 and inverter active power 33079–33080. PV, inverter AC, battery and site-meter values have different boundaries.
• Battery BMS measurements, site meter readings and inverter output are different sources; preserve those identities when designing a monitoring map.

Setup

1. Identify the inverter and external port

   Use the exact S6-EH3P50K-H nameplate and European V1.2 manual. The communications table identifies EMS as the third-party external RS-485 connection; its drawing assigns A to RJ45 pin 5 and B to pin 4. The optional-port section also describes an inverter-master function. Select the external EMS role and preserve existing ownership before adding a polling master. Meter, BMS and parallel connectors remain separate; COM is the logger connection.

2. Choose RTU or the supported logger

   The public protocol gives RTU starting values of address 1, 9600 baud, 8 data bits, no parity and 1 stop bit; match installed settings. Solis describes the dedicated S6 RTU port as separate from cloud monitoring. For TCP, the developer platform identifies S2-WL-ST firmware 100101B4 or later; use its assigned LAN IP and port 502. The logger SOP says enabling TCP disconnects that logger from SolisCloud, so retain the dedicated RTU route when cloud continuity matters. Do not treat the inverter RJ45 RS-485 connector as Ethernet.

3. Record identity and the first read

   Use the public Energy Storage Inverter protocol Ver3.5, revised July 2026, as a best-effort starting point. FC04 input register 35000 identifies the family: Appendix 1 lists 0x2073/0x2173/0x2273 for S6 high-voltage 29.9–150 kW units. Read the displayed model and firmware alongside it. The document’s decimal numbers are wire addresses, confirmed by its 33001 example using hex 80 E9; do not remove a 30000 prefix or subtract one. Space query frames by more than 300 ms; one-second polling is a practical starting interval.

4. Read frequency and battery SOC

   FC04 register 33094 (hex 0x8146), quantity 1, is grid frequency as U16 × 0.01 Hz. Request PDU: 04 81 46 00 01. Read bytes high first: synthetic data 13 88 is 5000, giving 50 Hz. Battery 1 SOC is FC04 33139 (0x8173), quantity 1, U16 in 1%: PDU 04 81 73 00 01 and data 00 4B give 75%. Compare these with the local inverter and BMS display before expanding.

5. Expand PV and inverter measurements

   FC04 33057–33058 is total PV input power, U32 in W, high word first. PDU 04 81 21 00 02; synthetic data 00 00 30 39 gives 12345 W. FC04 33079–33080 is inverter/rectifier active power, S32 in W with the same order; 00 00 30 39 gives +12345 W and FF FF CF C7 gives -12345 W. Establish the installed direction against the display; this is inverter AC power, not whole-site import/export. Add total PV energy 33029–33030 U32 in kWh, today’s PV energy 33035 U16 × 0.1 kWh, and PV1 voltage/current 33049/33050 U16 × 0.1 V/A as needed.

6. Keep zero, faults and freshness distinct

   The protocol says an unimplemented register can return 0000 without an exception. Treat an unexplained zero as a point-support check rather than proof of no energy flow. Retain timestamps and mark timeouts or invalid replies stale. Read status 33095 with fault detail 33070 using the protocol appendix; compare the exact alarm with the inverter display. Battery modes, export limits and grid settings remain with the commissioned control system.