Dyness HV9640 Tower Pro battery module3.84kWh 96V LFP expansion module for Tower Pro

Overview

The HV9640 is the battery module of the Dyness Tower Pro. It contains 30 lithium iron phosphate cells of 3.2V and 40Ah in series, for 96V nominal and 3.84kWh, and supports charge and discharge at up to 40A (1C). It is used in towers of two to six modules, 7.68kWh to 23.04kWh, under the Tower Pro BDU controller and base, which are needed for every tower. The module is IP55, 587×310×220mm and 40.5kg, and is recognised automatically when stacked. Dyness allows mixing modules of different ages within three years.

• HV9640 modules: 96V, 40Ah, 3.84kWh each
• 2 to 6 modules per tower, 7.68–23.04kWh
• 1C charge and discharge with inverter communication
• IP55, built-in aerosol fire extinguisher
• Up to 12 towers in parallel, 276.48kWh
• Optional heating for charging down to -20°C

How it works

Tower Pro is a stack of HV9640 lithium iron phosphate modules on a base, topped by the battery disconnect unit (BDU). Each module contains 30 cells of 3.2V and 40Ah in series and adds 96V and 3.84kWh. The five configurations, TP7, TP11, TP15, TP19 and TP23, use two to six modules and run at 192V to 576V nominal, from 7.68kWh to 23.04kWh. Dyness rates 95% depth of discharge, so a TP23 offers 21.888kWh usable.

Modules are connected by composite plug-and-socket connectors that carry power, communication and heating lines, so the stack needs no cables between modules. Modules identify themselves when stacked. The base sits under the stack and the BDU on top, and a tower is completed by fixing brackets that hold it against the wall.

Key features

When the battery communicates with the inverter it charges and discharges at up to 40A, which is 1C: a TP7 handles 7.68kW and a TP23 23.04kW. Dyness states at least 8,000 cycles at 0.2C, 25°C and 95% depth of discharge to 70% end of life.

The IP55 enclosure is naturally cooled, each tower has a built-in aerosol fire extinguisher, and Dyness allows modules of different ages to be mixed within three years. Heated versions start heating below 2°C ambient, powered by the inverter or by the battery itself down to 20% state of charge, and stop once the coldest cell is above 5°C.

Installation and compatibility

The tower stands on the floor and is fixed to the wall with brackets; leave 300mm around it and keep it out of direct sun, rain and snow. The earth connection must be below 100mΩ. A tower is 587mm wide and 310mm deep, its height being 338mm plus 220mm per module. Up to 12 towers of the same model and capacity can run in parallel if their voltages are within 20V and all are fully charged.

Two inverter cables are supplied: one marked RS485 for KOSTAL, one marked CAN for Solis, GoodWe, Solinteg, Deye, Sineng, ATESS, Sinexcel, Solplanet and others. Dyness lists Tower Pro certifications to IEC 62619, IEC 63056, IEC 62477, IEC 62040, VDE-AR-E 2510-50, CEI 0-21 and CEI 0-16.

Monitoring and warranty

The BDU front shows run, communication, fault and state-of-charge LEDs, and its Wi-Fi module links the tower to the Dyness app and web portal for monitoring and remote firmware updates. In Europe the warranty is ten years with 70% usable energy retention or a minimum energy throughput per model, and can be extended to 15 years. Batteries used without inverter communication are covered for three years only.

Questions and answers