LP-HV-512 high voltage LiFePO4 battery stack

51.2 kWh at 512 V from ten standard modules — the platform for containerised storage and large commercial inverters where the DC bus is high voltage by design.

Brand: HighIdea
Type: High-voltage LiFePO4 stack, 10S module
Typical applications: Container ESS, large commercial inverters, traction, industrial DC systems
Models in range: LP-HV-410 eight-module, 41 kWh, LP-HV-512 ten-module, 51.2 kWh, LP-HV-819 sixteen-module, 82 kWh
Category: Battery Packs

Series for voltage, parallel for capacity

This is the architecture rule that governs every high-voltage project, and getting it wrong is expensive. The number of series modules sets the DC voltage and is fixed by the inverter or PCS input window. Capacity is added by paralleling complete stacks, never by extending a stack.

That means the DC voltage decision is made once, at design stage, and everything afterwards scales by duplicating a known-good string.

Documentation is part of the deliverable

On a container project the electrical documentation is as much of the product as the battery. Every stack ships with a single-line diagram, an installation and commissioning procedure, a service disconnect procedure and the module-level test logs. In most markets those documents are what the authority inspects, and a project that cannot produce them does not energise.

Key Features

512 V nominal from ten 51.2 V modules in series
51.2 kWh rated energy per stack
Master-slave BMS with one slave per module and one master per stack
Integrated pre-charge and sequenced main contactor
Insulation monitoring with automatic contactor trip
100 A continuous, 200 A peak — about 51 kW continuous at nominal voltage
Parallel stacks for capacity, not series extension

Specifications

Nominal voltage	512 V (10 × 51.2 V)
Rated energy	51.2 kWh
Usable energy	approximately 46 kWh at 90 % depth of discharge
Continuous discharge current	100 A (approximately 51 kW)
Peak discharge current	200 A for 10 s
Continuous charge current	50 A per stack
BMS architecture	master-slave
Communication	CAN to PCS or inverter
Protection	over/under-voltage
Pre-charge	integrated
Enclosure	steel rack cabinet
Mass	approximately 620 kg including cabinet

Specifications subject to the latest factory data. Final configuration is sized against the actual load, backup runtime and site power conditions — this table is for pre-selection only.

Applications

Containerised commercial storage

Multiple stacks in parallel inside a 20 ft container with a PCS, providing the DC side of a 250 kW / 500 kWh system.

Large commercial inverter

Matches inverters specified with a 480–600 V DC window and a single CAN interface for the whole battery.

Traction and heavy vehicle

Where a high-voltage DC bus is already present and weight distribution across the chassis is a design constraint.

FAQ

How many stacks can be paralleled?

Up to eight in a typical container arrangement, giving about 410 kWh per container. Above that the DC protection and the number of parallel strings make fault discrimination harder, and a different architecture is usually warranted.

What happens if one module fails in the middle of a series string?

The master BMS detects the cell-level anomaly through that module's slave board and opens the stack contactors. The stack is then offline until the module is replaced. Series strings do not tolerate a module being bypassed, which is why module-level diagnostics matter more here than in a low-voltage parallel system.

Is 51.2 kWh per stack a hard limit?

Per stack, yes at this module count. Higher stack voltages are available at 819 V, and per-stack energy scales with module capacity. Where a project needs more energy at the same voltage, the answer is more stacks in parallel rather than more modules in series.

Do you provide the PCS?

We supply the battery and the DC side, and we integrate with the customer's chosen PCS. Where a project has no PCS selected, we work with partners and can supply a matched unit — tell us the application and the grid code and we will propose a configuration.

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