Bloom Energy Energy Server 5 (ES5-FA2AA0 / ES5-BA2AA0), 200 kW

Bloom's 200 kW Energy Server 5, and the vintage trap that separates it from the older ES-5700 at the same rating

Bloom Energy Energy Server 5 (ES5-FA2AA0 / ES5-BA2AA0), 200 kW is one of 12 fuel cells tracked in the SecondWatt catalogue, each with specifications, lead times and indicative secondary-market pricing.

Bloom Energy Server 5 200 kW dossier: how to tell an ES5 from the older ES-5700 at the same rating, specs, certification status and inspection guidance.

Two Bloom machines carry a 200 kW rating a decade apart, and confusing them is the most likely listing error on this platform. The Energy Server 5 builds are ES5-FA2AA0 at 200 kW net AC base load and ES5-BA2AA0 at 210 kW nameplate and 200 kW base load, both weighing about 13.6 to 13.7 tons with a 65% to 53% LHV efficiency band on the FA2AA0 sheet. The earlier ES-5700 is also 200 kW base load and 210 kW nameplate, but weighs 19.4 tons and publishes efficiency as simply above 50% LHV. That is a difference of roughly six tons and fifteen efficiency points on identical nameplate kilowatts. It changes the rigging plan, the pad design, the fuel consumption and the value. The ES-5700 was certified under CARB Executive Order DG-036, which expired on 21 September 2016; the ES5 family ran under DG-044, which expired on 27 March 2026. The ES-5700 population matters commercially for a different reason. Certified in 2011, these are the oldest large-population Bloom units in the field and therefore the only cohort old enough to be decommissioned in volume, which makes them the most realistic candidate for genuine used supply if any ever reaches an open channel. None has. The current equivalent at this rating is ES6-2000 on the Energy Server 6.5 platform.

Why it matters

Nameplate kilowatts are not an identity in this category. Two machines a decade apart share 200 kW and differ by six tons and fifteen efficiency points, and only the model code separates them. Any listings pipeline for fuel cells has to key on the model code rather than the rating, which is the same discipline the Mitsubishi 9900A and 9900AEGIS pair demands in uninterruptible power supplies.

Who buys it

Owners of installed 200 kW Bloom fleets managing spares and service across both vintages, and anyone diligencing a listing that says 200 kW without stating a model code. New buyers at this rating are routed to ES6-2000 on the current platform, which shares no parts with either older build and carries a live CARB certification the older units no longer hold.

Role in the data center

Primary on-site generation in arrays, and the entry increment for smaller commercial and institutional sites across the 2011 to 2023 Bloom build era.

Key specifications

Technical summary

ES5-FA2AA0: 200 kW net AC base load; 65-53% LHV cumulative; 5,811-7,127 Btu/kWh; 13.6 tons ES5-BA2AA0: 210 kW nameplate and 200 kW base load; 53-60% LHV; 6,295-7,127 Btu/kWh; 13.7 tons ES-5700 (predecessor): 210 kW nameplate and 200 kW base load; above 50% LHV; 19.4 tons Fuel: natural gas and directed biogas at 10-18 psig, 15 psig nominal ES-5700 fuel consumption: 1.32 MMBtu/hr on natural gas Emissions: NOx below 0.01, CO below 0.05, VOC below 0.02 lb/MWh on the FA2AA0 build CO2: 679-833 lb/MWh on natural gas (773 on the ES-5700) Dimensions: 14 ft 9 in x 8 ft 8 in x 7 ft 0 in (26 ft 5 in x 8 ft 7 in on the ES-5700) Environment: minus 20 to 45 degrees C, 0 to 100% humidity; below 70 dBA at 6 ft Certification: ANSI/CSA FC1-2014, California Rule 21, IEEE 1547, CARB 2007

Pricing and availability

Trend: up Lead time, new: Superseded; new orders route to ES6-2000.

Lifecycle and maintenance

Solid oxide stacks are the consumable and the manufacturer controls them. Bloom reports a fleet of more than 20,000 fuel cell modules deployed since 2009, with modules from 2014 and 2015 showing a median recorded life of 4.9 years, more than 900 running past 5 years and a maximum to date of 7.7. Replacement is a manufacturer operation performed on site in under an hour, after which title to the removed module passes back to the manufacturer and the hardware goes to its own repair and overhaul centre. Contracted service runs 5 to 20 years and covers filter and adsorbent replacement alongside periodic fuel cell replacement, and the dollar rate per kilowatt is redacted in every public filing reviewed.

Common failure points

• Stack degradation — Cumulative electrical efficiency falls from 65% toward 53% LHV across module life
• Title reversion on replaced modules — Every swapped fuel cell module reverts to the maker by contract, so a used unit may be missing its stacks
• Thermal cycling — High-temperature ceramic stacks tolerate a limited number of shutdowns and no maker publishes an allowance
• Sulfur and siloxane contamination — Sulfur deactivates catalysts and siloxanes deposit silica across anode surfaces
• Certification lapse — A California siting certification issued to the maker expires on a schedule the buyer does not control
• Service dependency — Third-party service is contractually barred on financed fleets and only the maker supplies stacks

Inspection checklist

Chain of title — establish whether the seller holds title or a project company does; Bloom contracts carry a right of first refusal at section 3.6 Repurchase right — get a written waiver; the contractual repurchase value is the greater of fair market value or 100% of purchase price reduced annually Module inventory — confirm which fuel cell modules are physically present; replaced modules revert to the maker under section 4.04 Measured heat rate — test against the 7,550 Btu/kWh minimum efficiency level in Bloom's own contracts and the 5,811-7,127 datasheet band Efficiency band — published cumulative efficiency runs 65% down to 53% LHV, so a mid-life unit is not a 65% machine Module age — Bloom reports a median recorded module life of 4.9 years and a maximum of 7.7 across more than 20,000 modules Thermal cycle count — the DOE lists limited shutdowns as an explicit challenge for stacks running at 500-1,000 degrees C, and no maker publishes an allowance Fuel quality history — total sulfurs above 5,000 ppbV average or H2S above 1,000 ppbV average exceed the published natural gas limit Siloxane exposure — 10 ppm of D5 caused total solid oxide failure in 30 hours at 1,000 degrees C in the Argonne fuel quality work Ammonia and halogens — the natural gas specification limits are 40 ppmV ammonia and 0.28 micrograms per cubic metre halogens Regulatory status — confirm a live CARB executive order covers the exact model; DG-044 for the ES-5 lapsed on 2026-03-27 Service entitlement — get a written service quotation first; third-party service is barred at section 10.01 of the standard agreement Operating data — request the remote monitoring history, which the maker holds under a 5 to 20 year service term Site scope — gas polishing media, wastewater and permitting sit outside maker scope, and cleanup ran about 1.8 cents per kWh in the Argonne 300 kW case Removal and rigging — a 325 kW unit runs 28,745 lb across 29 ft 5 in, so verify crane access and transport width

Procurement channels

Service and module replacement through Bloom only. The one documented fleet turnover on this platform was Bloom repurchasing its own 30 MW Delaware installed base in 2019, with removal inside ten business days and no hardware reaching a public resale channel.

Regional notes

The ES-5700 CARB certification DG-036 expired 2016-09-21 and the ES5 family certification DG-044 expired 2026-03-27, so neither vintage can be sited in California today under a live order without the manufacturer recertifying.