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30–35 kW Diesel Generator Fuel Consumption

Manufacturer-documented fuel consumption for 40 30–35 kW Diesel generator sets — median 2.51 gal/h at full load, 1.22 gal/h at half load.

Compare 30–35 kW Diesel generator specs side-by-side →

Consumption by model

Model	kW	gal/h @ 50%	gal/h @ 100%	Tank (L)	Runtime @ 50% (h)
Caterpillar XQ30	30	1.27	2.32	291	60.6
Caterpillar XQ35	30	1.14	2.30	208	48.1
Cummins/Onan C30 D6	30	0.97	1.81	280	76.1
Cummins/Onan DEH Series	30	—	0.72	—	—
Generac RA03022	30	0.85	1.37	189	59.1
Generac RD030	30	0.22	0.39	233	274.1
Generac SD030	30	0.98	2.75	—	—
Gillette SPD-300-1-1	30	1.22	2.69	10	2.2
Gillette SPD-300-3-16	30	1.22	2.69	10	2.2
Gillette SPD-300-3-2	30	1.22	2.69	10	2.2
Gillette SPD-300-3-3	30	1.22	2.69	10	2.2
Gillette SPD-300-3-4	30	1.22	2.69	10	2.2
Gillette SPD-300-3-5	30	1.22	2.69	10	2.2
Gillette SPD-300-60 HERTZ	30	1.22	2.69	10	2.2
Hipower HJW 30 T6	30	1.24	2.51	—	—
Hipower HRJW 35 T6	30	1.24	2.51	100	21.3
Kohler 30 REOZK4	30	1.32	2.59	293	58.6
Kohler 30EORZD	30	1.11	2.06	—	—
Kohler 30REOZJ	30	1.37	2.48	—	—
Kohler 35 REOZT4	30	1.32	2.59	293	58.6
MTU 3R0096 DS30	30	1.29	2.40	—	—
MTU MTU 3R0096 DS30	30	1.37	2.62	—	—
Northern Lights M30	30	1.31	2.44	200	40.3
Northern Lights M944W3	30	1.10	1.96	—	—
SDMO TM30UC	30	1.59	2.59	36	6.0
Wildcat Roughneck Diesel 30KW	30	1.24	2.59	265	56.6
Yanmar HYW 35 T6	31	0.38	0.68	26	18.2
Generac MMG35DF4	31	—	2.06	379	—
Perkins 404D-22TAG ElectropaK	31	1.22	1.72	—	—
FG Wilson LH40	32	—	2.91	44	—
FG Wilson P35-3S	32	1.69	3.43	219	34.2
FG Wilson P44-1	32	—	2.38	219	—
Kohler 32EKOZD	32	1.29	2.56	—	—
Kohler 32EOZ	32	1.11	2.06	—	—
Kohler 33EFORZD	33	1.53	2.83	—	—
Kohler 33EFOZ	33	1.45	2.67	—	—
Perkins 1103A-33	33	1.03	55.77	—	—
Perkins FPE 33 M	33	—	1.90	140	—
Cummins/Onan C45D5	34	2.38	—	200	22.2
Lister Petter LLD 400	35	—	0.50	66	—

Figures from each model’s own manufacturer documentation (spec sheets and manuals); runtime = documented tank capacity ÷ consumption at 50% load. Verify against the datasheet for your exact configuration.

Common questions

How much fuel does a 30–35 kW Diesel generator use?

Across 39 models with manufacturer data, full-load consumption runs 0.39–55.77 gal/h (median 2.51); at 50% load the median is 1.22 gal/h.

How long will a 30–35 kW Diesel generator run on a full tank?

At 50% load, documented tank sizes give 2.2–274.1 hours (median 22.2 h) across 21 models.