Solplanet Ai-HB 2.56LG battery module2.56kWh 50Ah LFP module for Solplanet high-voltage battery stacks

Overview

The Ai-HB 2.56LG is a 2.56kWh, 50Ah lithium iron phosphate module for Solplanet's Ai-HB high-voltage battery. Three to ten modules are connected in series under one high-voltage box with BMS, giving 7.68 to 25.6kWh and 153.6 to 512V nominal; each module weighs 26.5kg. The stack charges and discharges at 25A nominal and 50A maximum, i.e. 3.84 to 12.8kW rated power. It is an indoor, floor-standing IP65 battery approved for the Solplanet ASW H-T2 and H-T3 three-phase hybrid inverters.

• 2.56kWh, 50Ah LiFePO4 module, 51.2V nominal per module
• Three to ten modules in series: 7.68 to 25.6kWh
• High-voltage box with integrated BMS on top of the stack
• 25A nominal, 50A maximum charge and discharge current
• IP65 enclosure, indoor floor-standing installation
• CAN or RS485 link to the inverter

How the system is built

An Ai-HB 2.56LG battery is a single stack of 2.56kWh lithium iron phosphate modules connected in series under a high-voltage box. The box contains the BMS: at start-up it detects the modules, assigns each one an ID and shows SOC and status on six LEDs. Three to ten modules give 7.68 to 25.6kWh nominal, 6.91 to 23.04kWh usable at 90% depth of discharge, and 153.6 to 512V nominal voltage.

Nominal charge and discharge current is 25A and the maximum is 50A, so rated power runs from 3.84kW with three modules to 12.8kW with ten, and maximum power from 7.68 to 25.6kW. Each module weighs 26.5kg. The stack is 600mm wide and 210mm deep; its height grows from 820mm with three modules to 1940mm with ten, and the total weight from 102.5 to 288kg.

Installation and compatibility

Solplanet's compatibility list (version 1.10, September 2026) approves the Ai-HB 2.56LG for the ASW05–12kH-T2 and ASW08–12kH-T3 hybrids and their DG versions, where it is selected in the app as Ai-HB 2.56LG. The manual forbids connecting stacks in parallel, mixing in batteries from other manufacturers and connecting the battery to a faulty or non-Solplanet inverter. The high-voltage box links to the inverter through its RJ45 Link Com Port using CAN.

Siting and maintenance

Install the stack indoors on fire-resistant building materials, in a dry, ventilated room away from heat sources, moisture and direct sunlight. The manual recommends 0–30°C for the best service life, while the operating limits are 0–55°C for charging and -20…+55°C for discharging. The self-locking nut on the last module must be removed before any work on the stack, and the battery should be recharged at least every six months.

Questions and answers