B2BEmersonEIMS serves commercial, industrial, healthcare, telecom, hospitality, government & contractor clients.• Engineering-led • SLA-backed • Documented commissioning
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Leading generator and power solutions provider in Uganda. Sales, installation, service, and spare parts for all generator brands.
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Site conditions · Fort Portal, Uganda
Elevation
1,518 m
highland
Design ambient
28.3 °C
mean max 24.5 °C
Altitude derate
12.2%
output lost to thin air
Combined derate
13.5%
100 kVA ≈ 87 kVA here
Fort Portal stands 1,518 m up — the highest of the 10 Uganda cities we cover, on highland ground. Thinner air means less oxygen per stroke, so 1,518 m costs 12.2% of rated output.
Practically: 100 kVA on the plate is about 87 kVA in Fort Portal. Size from the plate and the set runs at its limit from day one, glazing bores and wet-stacking. At 1,518 m a turbocharged engine recovers most of that 12.2% and is usually worth the difference.
16.1 °C to 24.5 °C is a narrow 8.4 °C cycle, so thermal movement will not age this installation. Steady warmth will: with nights only reaching 16.1 °C the batteries never cool, and sealed lead-acid life roughly halves per 10 °C sustained above 25 °C. Budget shorter replacement intervals in Fort Portal than the datasheet implies.
Fort Portal is roughly 771 km west of our base at Embakasi, Nairobi, in a straight line and across a border. At 771 km, mobilisation is a real line in any Fort Portal quotation, and a machine waiting on a travelling part waits days, not hours. Hold a critical kit on site — filters, belts, an AVR, injectors — rather than ordering per failure.
Elevation: Open-Meteo Geocoding API (GeoNames elevation), retrieved 2026-08-26. Temperature: Open-Meteo Archive (ERA5 reanalysis), 2025 daily maxima and minima. Derate figures are planning estimates using standard corrections (approximately 1% per 100 m above 300 m; 2% per 5 °C above 25 °C); final sizing follows the engine manufacturer’s own derate tables for the set proposed.
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