BYD Battery-Box Premium HVS and HVM

Compatibility

Monitoring through a supported inverter only

For example, BYD approves specified Symo GEN24 Plus combinations and Fronius documents read-only storage charge level and state through the inverter Modbus interface. This is an inverter-mediated route, not a direct Battery-Box interface to Edge.

Original Battery-Box Premium HVS 5.1–12.8 and HVM 8.3–22.1 using the original BCU document set. BCU2.0, HVS+/HVM+, HVM-US, HVL and low-voltage families are outside this scope. No battery CAN adapter, register import or battery control is supplied.

Models

Specifications

These are DC usable-energy ratings at 100% depth of discharge, 0.2C charge/discharge and +25 °C. Delivered AC energy depends on the inverter, operating window and losses. The advertised tower name is rounded: HVM 22.1 contains 22.08 kWh of rated usable DC energy.^1, 2

HVS usable DC energy

5.12 / 7.68 / 10.24 / 12.80 kWh for 2 / 3 / 4 / 5 modules¹

HVS nominal voltage

204.8 / 307.2 / 409.6 / 512 V for 2 / 3 / 4 / 5 modules¹

HVM usable DC energy

8.28 / 11.04 / 13.80 / 16.56 / 19.32 / 22.08 kWh for 3–8 modules²

HVM nominal voltage

153.6 / 204.8 / 256 / 307.2 / 358.4 / 409.6 V for 3–8 modules²

Battery output current

HVS: 25 A maximum, 50 A for 3 s; HVM: 50 A maximum, 75 A for 3 s^1, 2

Chemistry and enclosure

LiFePO4; IP55; indoor/outdoor floor-standing installation subject to the manual^1, 2, 4

Temperature

-10 to +50 °C; power derating between -10 and +5 °C^1, 2

Battery communications

CAN / RS485; not a published direct Edge Modbus map^1, 2

GEN24 single-tower minimum firmware in V2.21

Symo GEN24 Plus: inverter 1.9.7-0, BMU 3.13, BMS 3.19; Primo GEN24 Plus: inverter 1.11.6-0, BMU 3.15, BMS 3.21. Parallel systems have a separate column.³

Interface

Documented measurements and integration boundaries for Battery-Box Premium HVS and HVM.

• Storage charge level and operating state where the installed inverter exposes them, such as GEN24 model 124.
• Inverter AC power and energy for the conversion boundary; these are not the same as DC battery energy.
• Battery alarms and commissioning status in the manufacturer system; external visibility depends on the inverter interface.
• Installed module count and inverter/battery firmware as configuration records, not invented Modbus channels.

Setup

1. Choose the approved combination

   Start with the exact inverter model, original battery control unit and proposed tower capacity. Use original-family compatible inverter list V2.21 dated 20 August 2025 and check for a newer manufacturer revision before purchase. It gives separate inverter, BMU and BMS minimum firmware for single and parallel towers.

2. Check module counts rather than matching brand names

   For example, V2.21 permits Symo GEN24 Plus with 2–5 HVS or 4–8 HVM modules. Primo GEN24 Plus is narrower: 2–3 HVS or 4–7 HVM. An HVM 8.3 tower has only three modules, so the larger family’s capacity range does not make it an approved GEN24 Plus combination.

3. Have the complete battery system commissioned

   Follow the exact BYD and inverter installation manuals through a qualified installer. This guide is not a pack-assembly procedure. Do not mix HVS and HVM modules or improvise parallel arrangements. The compatibility list specifically excludes three HVM 22.1 towers in parallel with Fronius inverters.

4. Use the inverter telemetry interface

   Confirm the battery is healthy and visible at the inverter first. For GEN24, enable the documented local Modbus monitoring endpoint on a restricted network, inspect the actual SunSpec models and read charge state and operating state. Do not enable control or connect Edge directly to the battery CAN/RS485 connector.

5. Validate the energy boundary

   Compare charge level and state with the inverter screen at the same time. Compare AC power with AC power, not module DC ratings. Record unavailable data distinctly from zero and recheck model exposure after firmware or hardware changes.

Common questions

Is HVM always better because its tower can hold more energy?

No. HVS and HVM use different module voltages, capacities and current ratings. The inverter’s battery voltage window and approved module count determine which configurations are usable. Compare permitted usable energy and power for the complete system, not only the largest battery tower.^1, 2, 3

Does RS485 mean I can import a Battery-Box Modbus template?

No. RS485 describes an electrical interface. These BYD documents do not provide a direct monitoring register map for Edge. Use an approved inverter’s documented external monitoring interface and keep its battery-management connection intact.^{1, 2, 4, 6}

Can I use this list for BCU2.0?

BYD publishes a separate BCU2.0 compatibility list and manual. Identify the control-unit generation and use its own documents; this guide deliberately covers the original HVS/HVM document set.⁵

What is a useful alternative to a high-voltage battery tower?

A low-voltage battery system with a dedicated BMS and inverter/charger is a different architecture. The Lynx Smart BMS NG guide explains one Victron approach. Its batteries, protective devices and DC currents are not interchangeable with an HVS/HVM tower.^1, 2