As I wandered over, I realized this was ‘almost’ a perfect example of the difference between Mil-Spec and what is called COTS (Commercial Off The Shelf) procurement…
On the left is a Kohler 30KW portable generator mounted on little two wheel trailer (commercially procured/assembled ‘system’)…
On the right is a Mil-Spec 30KW portable generator mounted on it’s Mil-Spec trailer…
First, note the difference in the trailers. Â On the left, a ‘standard’ little lightweight 2 ton trailer. Â Single axle, small ‘feet’ for stabilization, generator is ‘attached’ to the trailer by 4 bolts on the bottom and four steel angle clamps about 3 inches wide. Â Standard trailer lights too. Weighs about 500 lbs. Â Standard trailer hitch, no trailer brakes. Small aluminium storage ‘tray’ forward of the genset.
On the right is a Mil-Spec ‘lightweight’ trailer. Â Dual axles, as wide as a Hummer, diamondplate steel fenders, full articulable large foot stabilizers. The generator is dropped between 12 inch by 3 inch I-beams welded and bolted to the trailer frame, and the generator is bolted to the I-beams by 10- 1/2 inch diameter bolts on EACH side, and also tack welded with 3-4 inch beads at each corner. Â Mil-Spec trailer lights, air brakes, individual hand brakes for each wheel, Â Pintle Hook instead of trailer hitch, welded steel storage box 12 inches deep by 36 inches long by 24 inches wide welded forward of the genset in the frame. Â Weight something around 2000-2100 lbs.
Now the gensets themselves…
Again Mil-Spec in foreground, Kohler in the background.
First the Kohler, note the limited number of access panels/doors, and the ‘lump’ just forward of the genset on the trailer is the ONE cable with ONE set of connections. Weight about 2600-2800lbs (full of diesel).
Next, the Mil-Spec (ugly Army green), note 4 access panels on the left side, repeated on the right side. On the rear are four more access panels. Â In the tray are a selection of cables, covering ‘most’ requirements, plus the black panel on the front of the genset allows access directly to the master three-phase output.
Weight over 3000lbs (full of diesel).
Now comes the ‘fun’ parts…
Time to procure-
Kohler setup- appx 30 days
Mil-Spec setup- appx 1 YEAR! Â (paperwork, justification, order, wait for manufacture, MOAR paperwork, etc.)
Cost- Â
Kohler setup- $15,000 WITH trailer
Mil-Spec setup-Â Somewhere between $80-100,000…
So bottom line, Mil-Spec costs between $65,000-$85,000 MORE money, but it’s “certified” to perform under all circumstances, go into battle, etc. etc…
(and requires a special school AND a license to operate)…
The Kohler? Â Hook it up and turn it on…
Any Army or Marine types that can verify costs of the Mil-Spec and weight would be appreciated (I have ‘guestimates’ from the power plant manager)…
Sigh… Â


