Ballard Power Systems FCgen-LCS liquid-cooled stack, 93 kW gross direct current

Ballard's heavy-duty liquid-cooled stack, 93 kW of bare direct current hardware rather than a genset

Ballard Power Systems FCgen-LCS liquid-cooled stack, 93 kW gross direct current is one of 12 fuel cells tracked in the SecondWatt catalogue, each with specifications, lead times and indicative secondary-market pricing.

Ballard FCgen-LCS dossier: 93 kW gross direct current at 500 A and 187 V, why it is a stack and not a genset, plus fuel purity and inspection notes.

FCgen-LCS is a fuel cell stack, not a generating set, and that distinction governs how it should be bought. Ballard's own taxonomy separates fuel cell modules, FCmove and FCwave, from fuel cell stacks, the FCgen family. The datasheet publishes a direct current operating point of 93 kW at 500 A and 187 V, with no inverter, no enclosure, no air handling, no hydrogen train and no controls. A buyer acquires between 10.2 and 26.7 kg of hardware depending on cell count, to a maximum of 311 cells. The stack is current production and it sits inside Ballard's own FCwave module, which the stationary power page describes as powered by the FCgen-LCS heavy-duty liquid-cooled stack. Ballard reports revenue from stationary stacks sold separately, so a standalone purchase is a real channel rather than an inference. What changed in 2026 is the layer above it: Ballard acquired GeoPura on 23 June 2026 for 275 million pounds upfront against an enterprise value of 301.1 million, adding containerised gensets with alternating current output at 250 kW and 500 kW. Two published inconsistencies matter at valuation. The FCwave page claims modules typically last up to 25,000 hours while the FCwave datasheet states above 15,000 hours for that module, and the 15 MW stationary order of June 2026 describes FCmove-HD+ as 100 kW each against a 120 kW datasheet rating. Ballard publishes no stack life, no degradation rate, no certification list and no warranty for FCgen-LCS itself.

Why it matters

Rating basis is where this record earns its keep. A 93 kW figure quoted without the words stack gross direct current invites comparison against a 100 kW alternating current genset, and the two are not the same purchase by a wide margin. Stationary revenue was 8.1 million dollars in 2025 against 99.4 million total, so this channel is small and thinly documented.

Who buys it

System integrators and genset builders who supply their own balance of plant. The stack is a component sold into hydrogen genset programmes, marine shore power and backup power modules, and Ballard booked 15 MW of stationary demand in June 2026 as 150 modules rated 100 kW each. A data center operator is not the buyer for this part number; the buyer is the company assembling the machine that a data center operator would then purchase.

Role in the data center

Component only. The data center relevance is indirect, through the hydrogen gensets integrators build around it and through the GeoPura containerised units now inside the group.

Configurations and options

Sold bare as a stack, or as the core of Ballard's FCwave module at 200 kW with 53% peak efficiency, operating voltage of 350 to 720 V without a converter, CANbus and Modbus TCP/IP controls and DNV marine type approval. The alternating current products in the group are the GeoPura units acquired in June 2026: HPU1 at 250 kW with a 250 kWh battery, and HPU2 at 500 kW in a 20 ft container.

Compatibility and dependencies

A stack alone will not generate usable site power. The integrator supplies the air compressor or blower, humidification, hydrogen recirculation, a direct current converter, sensors, controls and, for alternating current output, an inverter. Coolant must be fuel cell grade glycol with deionised water, and hydrogen must meet the cited grade at the stack inlet.

Pricing and availability

Trend: up

Lifecycle and maintenance

Proton exchange membrane products are rated in operating hours rather than years, and the published figures are module-level: above 15,000 hours on Ballard's FCwave and above 25,000 on FCmove-HD+, against a family claim of up to 25,000. A unit in continuous duty is consumed in under three years while a telecom standby unit running a few hundred hours a year is barely touched, so runtime hours rather than calendar age govern valuation. The DOE durability targets for the technology are 5,000 hours with cycling and 5,000 start-up and shutdown cycles. No manufacturer in this set publishes stack rebuild, membrane assembly replacement or refurbishment pricing.

Common failure points

• Catalyst poisoning — Carbon monoxide, sulfur and ammonia poison the membrane assembly invisibly and irreversibly
• Runtime consumption — Module lifetimes run 15,000 to 25,000 hours, so continuous duty consumes a unit in under three years
• Water management and freeze — Freeze and thaw damage is the failure mode most sensitive to storage conditions
• Coolant contamination — Fuel cell grade glycol and deionised water are specified, and automotive coolant destroys a stack
• Balance of plant — Compressor, humidifier, recirculation and power electronics carry the cost rather than the stack
• Parts continuity — Consecutive cost reduction programmes have narrowed the catalogued part list at every maker in this set

Inspection checklist

Stack or system — a bare stack has no inverter, enclosure, air handling or hydrogen train; FCgen-LCS is 10.2 to 26.7 kg of DC hardware Rating basis — confirm stack gross DC against system net AC; the FCgen-LCS rated point is 93 kW at 500 A and 187 V DC Runtime hours — published module lifetimes run above 15,000 hours on FCwave and above 25,000 on FCmove-HD+ Start and stop cycles — the DOE durability target for start-up and shutdown is 5,000 cycles Hydrogen grade — datasheets cite ISO 14687:2019 Grade D, a standard withdrawn on 2025-02-12 and replaced by the 2025 edition Fuel supply history — poisoning by carbon monoxide, sulfur and ammonia is cumulative and irreversible across 100% of the catalyst area Freeze exposure — confirm the unit was purged and stored above its minimum start temperature; FCwave cannot start below 0 degrees C Ambient limits — the bare stack runs minus 30 to plus 80 degrees C while the packaged FCwave module runs above 0 to 45 Coolant condition — fuel cell grade glycol and deionised water are specified, and 1 fill of automotive coolant destroys a stack Coolant temperature — verify against a maximum of 86 degrees C at the stack and a 65 degrees C outlet on FCwave Cell count — the FCgen-LCS rated point is footnoted to the 311-cell build, and length runs 131 to 601 mm with cell count Balance of plant — compressor, humidifier, recirculation, DC to DC converter and, on AC gensets, the inverter and a 250 kWh battery Firmware and controls — FCwave uses CANbus and Modbus TCP/IP, and a unit without current firmware is not commissionable Part number support — confirm the exact part number is still catalogued after 2 consecutive 30% cost reduction programmes Repair pricing — no maker in this set publishes stack rebuild or membrane assembly pricing, so budget from an OEM quotation only

Regional notes

Manufactured in Burnaby, British Columbia, with additional facilities in Hobro, Denmark and Bend, Oregon. The stack datasheet lists no certification marks; module-level marks exist instead, with FCgen-1020ACS certified to CAN/CSA-C22.2 No. 62282-2 and FCwave holding DNV marine type approval.