Sun-Mar GTG
Sun-Mar’s low cost urine-diverting toilet for cabins, boats and RVs, with a normal seat height and a tiny fan draw.
Amazon $633$633
The Sun-Mar GTG is the better toilet overall, rated 3.8 to 3.5. The Sun-Mar GTG leads on warranty. The Trelino Evo L costs $13.01 less ($619.99 vs $633).
Trelino Evo L
#12 in Urine-divertingFull review
The roomiest Trelino: a power free diverting toilet with near normal seat height for longer van trips and small cabins.
Amazon $619.99$619.99
Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Sun-Mar GTG for warranty (3-year warranty vs 2-year warranty).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every urine-diverting toilet; a clear win is highlighted. How we rank explains each one.
| Factor weight | Sun-Mar GTG | Trelino Evo L |
|---|---|---|
| Overall rating | 3.8/5 | 3.5/5 |
| Value 30% | 77 $633 | 79 $619.99 |
| Capacity 25% | 50 capacity not published (neutral score used) | 30 about 11 uses per solids bin, 2.6 gal urine bottle |
| Power 15% | 100 0.6 W fan | 100 needs no power |
| Certification 15% | 50 NSF/ANSI 41 certification not stated (neutral score used) | 50 NSF/ANSI 41 certification not stated (neutral score used) |
| Warranty 15% | 50 3-year warranty | 25 2-year warranty |
Specifications
| Sun-Mar GTG | Trelino Evo L | |
|---|---|---|
| Capacity | ||
| Type | Urine-diverting | Urine-diverting |
| Uses per solids bin | - | 11 uses |
| Urine bottle | - | 2.6 gal |
| Urine drain option | No | No |
| Agitator | - | No |
| Power and venting | ||
| Power | 12V | None needed |
| Fan | 0.6 W | - |
| Build | ||
| Seat height | 18 in | - |
| Dimensions | 15.75 x 24 x 19.8 in | 13 x 15.4 x 16.9 in |
| Weight | 33 lb | 10.8 lb |
| Material | - | Recyclable ABS plastic |
| Warranty | 3 years | 2 years |