Name: Sun-Mar Excel NE
Brand: Sun-Mar
Price: 1825.00 USD

For off-grid cabins that need a certified toilet with no power; plan for a drain line and a tall vent.

Price checked October 31, 2026. As an Amazon Associate we earn from qualifying purchases.

Pros

Cons

Must drain liquid to an approved drain pit or container, which adds installation work
Needs a 4 in vent pipe, larger than the 2 in vent on the electric models
Big and tall for a bathroom: 33 in deep

The Sun-Mar Excel family

Every Sun-Mar Excel model we rank, smallest first. Ratings compare each against its own type.

Model	Capacity	Rating	Price
Sun-Mar Excel	3 people	3.1/5	$2,040
Sun-Mar Excel NE (this one)	2 people	3.6/5	$1,825

How it scores

The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its type. How we rank explains each one.

For cabins and homes on grid power that need a certified toilet for a full time household; its power draw rules out vans and small solar systems.

$2,040

For grid-powered cabins and cottages that want a hands-off composting toilet: automatic mixing and evaporation with no urine bottle, at a high price.

$2,255

For a small cabin bathroom on grid power with one full time user or occasional guests, where a certified toilet is required.

$1,935