Generators
Terrapin Construction Group lists these 2026 generator lead times (terrapincg.com, read 2026-09-25):
- Diesel, 500 to 1,000 kW: 32 to 48 weeks
- Diesel, 1,500 to 2,000 kW: 50 to 66 weeks
- Diesel, 2,500 to 3,500 kW: 62 to 82 weeks
- Diesel, 3,500 to 4,500 kW: 90 to 110 weeks
- Natural gas, 1,000 to 3,000 kW: 54 to 78 weeks
Archdesk puts generators at 40 to 70 weeks and names the emissions package and witness testing as the single point that breaks the program (archdesk.com, published 2026-04-16).
UPS and transfer switches
Terrapin's 2026 figures (read 2026-09-25):
- Static UPS, 100 to 500 kVA: 20 to 32 weeks
- Static UPS, 500 to 1,500 kVA: 30 to 48 weeks
- Modular UPS, 2,000 kVA and up: 40 to 60 weeks
- Diesel rotary UPS: 60 to 80 weeks or more
- Automatic transfer switches: 24 to 40 weeks
Archdesk puts UPS and PDUs at 30 to 50 weeks, with submittal churn and late approvals as the break point. Terrapin reports UPS lead times improved modestly from 2024 peaks.
What to track on each line
For generators: the emissions package, the witness test date and the ship date. For UPS: submittal approval and the ship date. A Long-Lead Register row keeps the vendor's latest written date for each, the sentence it came from, and float against your required-on-site date.
Questions
How long does a data center generator take in 2026?
Terrapin lists 50 to 78 weeks for 1,500 to 3,000 kW diesel units and 90 to 110 weeks for larger units (read 2026-09-25). Archdesk names witness testing and the emissions package as gates worth tracking on their own.
What is the lead time for a 500 to 1,500 kVA UPS in 2026?
Terrapin lists 30 to 48 weeks for static UPS systems in that range. Modular UPS at 2,000 kVA and up runs 40 to 60 weeks.
Sources
- Terrapin Construction Group, Switchgear, Transformer, and Generator Lead Times in 2026, terrapincg.com/news/switchgear-transformer-generator-lead-times-2026, read 2026-09-25
- Archdesk, 2026 US Data Center Construction: $85B Market Breakdown, archdesk.com/blog/2026-us-data-center-construction, published 2026-04-16, read 2026-09-25
Updated . Lead times are public planning ranges, not quotes; your vendor's written date governs.