TESVOLT TS-I HV 80

Compatibility

Compatible with EpiSensor Edge over Modbus TCP through the TESVOLT Energy Manager

TESVOLT publishes the Energy Manager marketer interface Modbus specification, revision H.01 (03/2025), for Energy Manager version 2.0 and higher: input registers for grid, PV, self-consumption, battery power and SoC, with word order stated per register. The Energy Manager 3.2 manual sets the interface up on port 1505. Edge reads the input registers as a Modbus TCP client.

TS-I HV 80 (A-series, datasheet v.E.01) and TS-I HV 80 E / TS-I HV 100 E (datasheet v.C.02) controlled by a TESVOLT Energy Manager 2.0 or later. Site check: have the installer add the TESVOLT AG marketer interface, confirm the unit ID it answers on, and compare SoC with myTESWORLD. Read-only: the holding registers 0 to 16 are marketer setpoints and watchdogs and stay unwritten.

Connect it with

• Wireless 3-Phase Electricity Monitor ZEM-65 From €625 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

TS-I HV 80 combines TESVOLT battery cabinets with an integrated three-phase battery inverter, the TESVOLT PCS, and the TESVOLT Energy Manager. The PCS takes up to four IPU inverter modules and runs in parallel with up to five other PCS systems.³

Battery, TS-I HV 80

76 kWh per cabinet (16 modules), Samsung SDI NMC prismatic, 761 to 930 V DC, 1C³

Battery, E-series

TS-I HV 80 E 80 kWh at 810 V nominal; TS-I HV 100 E 96 kWh at 972 V nominal⁴

TESVOLT PCS

75 or 85 kW per IPU, 1 to 4 IPUs, 400/480 V AC ± 10 %, 125 A AC per IPU, Modbus TCP/IP^3, 4

Marketer interface

Energy Manager Modbus TCP server, port 1505; input and holding registers^1, 2

Energy Manager

IP20, indoor; -25 to +55 °C; 2 x RJ45 Ethernet (LAN 1 local, LAN 2 dedicated Modbus) and RS-485²

Enclosures

Battery and PCS IP 20; PCS 0 to 40 °C^3, 4

Interface

Documented measurements and integration boundaries for TS-I HV 80.

• Address convention: the specification prints a zero-based ADDRESS column and a one-based REGISTRY column. Send the ADDRESS: SoC at ADDRESS 9 is REGISTRY 10.
• Word order: a single register is big-endian. For 32-bit values the table names the low word and the high word; on every pair the low word is at the lower address.
• Input registers, FC04, read only: instantaneous power of the mains connection at 0 (low) and 1 (high), integer in W; PV power at 5 and 6; self-consumption power at 7 and 8; PV plant power at 30 and 31.
• Battery, input registers: state of charge at 9 (low) and 10 (high) as a float in %; battery charge/discharge power at 11 and 12 as an integer in W; possible maximum charging power at 32 and 33, possible maximum discharging power at 34 and 35, both W; storage capacity at 36 and 37 in Wh.
• Grid operator limit, input registers: maximum power value from the grid operator (EISMAN) at 3 and 4, integer in W.
• Error word, input register 100: 0x0000 no error, 0x0001 PV system error, 0x0002 battery system error, 0x0004 mains connection recording error, 0x0008 PV recording error, 0x0010 self-consumption recording error, 0x0020 SoC recording error.
• Sign and type: the specification calls the power values integer without stating whether they are signed or which direction is positive. Confirm the sign of mains and battery power against myTESWORLD under a known charge and a known import.
• Mirrored setpoints at input registers 20 to 27 show what the marketer has requested; they are not measurements.
• Holding registers 0 to 16 are read/write marketer setpoints, nominal powers and watchdogs (written about every minute during curtailment). Edge does not write them; control needs the site owner's, the marketer's and TESVOLT's agreement and is outside this guide.

Setup

1. Add the marketer interface on the Energy Manager

   In the Energy Manager, the installer opens Device Configuration > External Specifications, selects Configure External Specifications and chooses TESVOLT AG marketer interface. The List Address is the Energy Manager's own IP address with port :1505. TESVOLT's manual then has an expert strategy select Marketer interface as the energy service for a PV or battery actuator group, which hands those actuators to the marketer. For read-only monitoring, agree with the installer whether that step is wanted, and check that the input registers answer before relying on them.

2. Connect Edge on the local network

   Connect the Gateway to the LAN 1 side of the Energy Manager, not to the dedicated Modbus network on LAN 2. TESVOLT asks for LAN 1 to be separated from the internal network, for example as a VLAN or guest network behind a firewall, so place the Gateway in that segment.

3. Read the input registers

   Create a Modbus TCP connection to the Energy Manager IP address on port 1505. The specification does not name a unit ID: confirm the value with the installer or TESVOLT service and record it. Read SoC at input ADDRESS 9 with FC04, two registers, as in the worked check.

4. Assemble 32-bit values low word first

   For each pair, take the register at the lower address as the low word: value = high x 65536 + low. Decode SoC as a 32-bit float from the same two words. Read each pair in one request so both halves come from the same sample.

5. Settle signs and errors

   Compare mains power at 0 and 1 and battery power at 11 and 12 with myTESWORLD during a known charge and a known import to fix each sign. Read error word 100 with every poll; a set bit means the related value is not being recorded and should be shown as unavailable.

Common questions

Can Edge read the TESVOLT battery APU directly?

The Energy Manager reaches the master APU over Modbus TCP on port 502, but TESVOLT publishes no register list for the APU. Read the marketer interface instead, and leave the dedicated network to the Energy Manager.²

What word order does the TESVOLT marketer interface use?

Single registers are big-endian. For 32-bit values the specification names the low word and high word of each pair, and in every pair the low word sits at the lower address.¹

Does reading the interface change how the storage system runs?

Edge reads only input registers. In TESVOLT's design, a marketer changes operation by writing the holding registers, and an expert strategy decides which actuators follow the marketer interface. TESVOLT also notes that firmware updates can change the communication protocol, so repeat the SoC check after one.^1, 2