If the evening ramp is not planned, storage drains early, the gas unit starts late and loads trip or ramp limits are missed. That means penalties, lost revenue and a solar programme whose evenings undo the value of its days.
Give Your Night-Ramp Machine a Real Evening Role
Map the evening ramp across the year: when PV output starts to fall, how fast it drops, when demand peaks and how long the night load lasts. Then decide which part storage carries, when gas turbine generators or engines start and how they hand over from storage. A firming unit started ahead of the ramp needs far less storage than one started after output has collapsed.
Combine Natural Gas Engines and Frame 6B in One Night-Ramp File
Used or new gas turbines belong in the same comparison, judged on start time, loading rate, fuel use and suitability for daily cycling. Keep all firming assets in one engineering file with one dispatch philosophy, so lenders and operators see a single coherent night-ramp plan. Fuel supply must also be firm in the evening, because interruptible gas contracts are often curtailed exactly when regional demand peaks.
Proof from recent work
Mining · Tanzania
Perseus Mining, Nyanzaga Gold Project
USP&E supplied 28 Cummins KTA50 containerised gensets for the Nyanzaga Gold Project in Tanzania.
Mining · Mali
Barrick Gold, Loulo-Gounkoto
USP&E refurbished the 104 MW power station, rebuilding more than 80 MW of Caterpillar CM32 engines and adding new zero-hour capacity.
Read the case study ›Data centres · USA
Major US hyperscale developers
USP&E refurbished 7 GE Frame 6Bs to zero hours in-house for major US hyperscale developers.
Your path from first call to reliable power
- Define solar evening gaps, night loads, and which duties a GT night ramp must cover versus storage.
- Integrate protection, SCADA, operator training, and hybrid O&M into one Extreme Ownership night-ramp plan.
- Complete permits, funding, fuel agreements, and low-irradiance evening drills before final machine selection.
Common questions
Why does your solar programme need a night-ramp plan?
USP&E builds night-ramp plans because solar output falls just as evening demand rises. Without defined roles for storage and gas firming, batteries drain early, firming starts late and loads trip or ramp limits are breached, costing penalties, revenue and offtaker confidence.
When should your gas firming start before the evening ramp?
USP&E sets firming start times from forecasts, battery state of charge and your machine’s start and loading time. Starting ahead of the predicted ramp lets storage cover only the fast changes, which protects battery life and keeps your evening output smooth and compliant.
Can a remanufactured GE Frame 6B cover your evening blocks?
USP&E can use a remanufactured GE Frame 6B for steady evening blocks once its records, controls and preservation are verified. Storage covers the faster part of the ramp while your turbine loads, and the dispatch plan keeps its daily cycling within sensible limits.
Do natural gas engines suit your evening firming?
USP&E often uses natural gas engines for evening firming because they start quickly, load fast and handle daily cycling well. Many programmes combine engines for flexibility with a turbine for larger steady blocks, matching the shape of the evening gap.
Why owners choose USP&E
USP&E is a full-service engineering, EPC and O&M company, not a broker. One team designs, builds and runs your plant, so nothing falls between contracts.
Facing a power challenge on site?
Tell us your load, fuel and timeline. A USP&E engineer will come back with options for Solar Power EPC projects, not a sales pitch.