Quietest marine generator: WhisperPower and Fischer Panda sets list 51 to 54 dB(A) at 7 m

51 dB(A) from WhisperPower, 52 dBA from Fischer Panda

Inside each range the order is clear. The two ranges are not merged.

A different load or test method could shift a reading by more than 1 dB, and neither maker gives either one. Our cross-brand decibel page walks through the problem.

Both makers measure at 7 m with the box on

That is about 23 ft. WhisperPower adds a second reading at 1 m. Nobody names a load.

Seven meters, 23 feet and 1 meter

Fischer Panda's 60 Hz sheets print "Noise Level dBa @ 7 meters", and its newer 3.5e and 5.5e sheets say "dBa @ 23 ft". The 3.5e page uses both labels for the same 54, so they are treated here as one distance.

WhisperPower's pages carry two numbers, for instance "51 dB(A) at 7 m, 60 dB(A) at 1 m" for the Piccolo 6. The 1 m figure describes the set at arm's length, closer to what someone working in the engine room hears, and no other maker supplies it.

Enclosure and load

Every figure here comes from a set inside its box. Fischer Panda footnotes that each set is "standard with a sound shield", and the Piccolo ships with one, so none of these numbers describes a bare engine.

Load is the missing piece. A diesel at idle and the same diesel feeding two air conditioners are different machines to listen to, and neither maker says which one it measured.

What is the quietest generator for a sailboat?

Two sets answer two different problems. The WhisperPower Piccolo 6 has the lowest figure, 51 dB(A) at 7 m. Fischer Panda's 3.5e is the lightest set with any figure, 54 dBA at 23 ft and 185 lbs.

The Piccolo 6 makes 6 kW at 120 V, and WhisperPower pitches it at boats of 29 to 40 ft. Its cabinet weighs 249.1 lb, and a separate 21.8 lb inverter mounts nearby.

The 3.5e is 16.3 inches tall and makes 3.6 kW at 120 V, aimed by Fischer Panda at "boats with tighter space and moderate power requirements". When the generator has to fit under a cockpit sole, height can count for more than 3 dB.

The 120/240 V sets by output

For split phase power, the Piccolo 10 lists 51 dB(A) at 7 m and Fischer Panda's 8 Mini DP and 9 DP list 52 dBA.

Neither range gets much louder as it grows. Fischer Panda adds 6.5 kW between the 8 Mini DP and the 15 Mini DP for 2 dBA, and the Piccolo 10 rates the same as the Piccolo 6 with 2.5 kW more.

Two Piccolos carry two figures each

For two Piccolo models, WhisperPower's product pages and its December 2025 US brochure give different 7 m figures. The Piccolo 12 page says 51 dB(A) where the brochure says 54, and the Piccolo 15 page says 54 where the brochure says 58. The Piccolo 6, Piccolo 10 and Piccolo 18 match across both documents. WhisperPower does not explain the gap.

Both disputed models stay out of the ranking.

Anyone weighing a Piccolo 12 against a Fischer Panda 12 Mini DP should ask the dealer which number WhisperPower stands behind.

Do Cummins Onan, Northern Lights and Kohler print decibels?

Not on any marine page or sheet we could open. Cummins Onan, Northern Lights and Rehlko, which now sells Kohler marine sets, list power, size and weight for their marine generators, but no sound level.

Cummins' Onan Marine QD 7/9 kW page covers ratings, certification and housed weight, and the Onan marine brochure tabulates every model from 4 to 65 kW with fuel use and dimensions. Older Onan marine spec sheets that carried sound data now return "Page not found", and the archived copies we found were for a superseded series.

Northern Lights gives the 6 kW M673L3G's sound enclosure a size and a weight on its sheet, and credits a "Sound Maze system" with reducing intake noise, still without a decibel value. Rehlko's PleasureCraft sheet lists models and weights and says to "Consult the generator spec sheet for more detail."

Is there a quiet gasoline marine generator?

Not one with a maker noise figure. Westerbeke's brochure covers its gasoline sets alongside its diesels and gives no decibel value for either.

Every figure on this page is for a diesel. Fischer Panda's 12 Mini DP lists "Ignition protection for gas powered boats", which lets a diesel set go into a gasoline boat's engine room, and it rates 54 dBA at 7 m. Our outboard motor guide covers the engine that pushes most small gasoline boats.

Boat, RV and standby figures do not mix

Distance, load and enclosure differ in each case, so a boat generator's figure cannot sit beside an RV or home standby figure. Cummins rates its built-in RV sets at a shorter distance and a stated load, compared in our RV generator guide. Home standby makers measure at 7 m but name exercise and running conditions, as the home standby guide shows. Neither marine maker here gives that much detail.