Trelino Evo L Composting Toilet review
By Tom Calder
We no longer recommend this model, so it no longer appears in our buying guides. In its place, we now recommend TROBOLO WandaGO Composting Toilet in our Emergency toilets guide.
Key specs
The maker's figures.
- Type
- Separating (composting) toilet
- Capacity
- —
Identical philosophy to the Evo M — urine separation, no water, no chemicals — in the size that makes it a genuine full-time or family option rather than an occasional backup: bigger solids container, bigger canister, domestic seat height. If a composting toilet would be your household's actual plan (off-grid annexe, boat, smallholding, or resilience against a long water outage), size matters more than price here; emptying less often is the entire quality-of-life difference.
- Best for
- The household-sized version — same system, capacities that suit daily family use.
We earn a commission if you buy through the retailer links on this page. It doesn't change our verdict. How we make money →
Researched, not used. We haven't used this product. This review is built from the maker's specifications, owner reports and our own sizing.
What we like
- Family-scale capacities stretch the emptying routine
- Domestic seat height — no campervan crouch
- Same clean separating design as the M
Worth knowing
- It is real money for a backup — the M covers occasional use
- Bulkier: needs a permanent ventilated spot
ⓘ As an Amazon Associate, PreparedBritain earns from qualifying purchases. We may earn a commission when you buy, or a fee when you request a quote, through our links. When two products are close, commission can decide which one we pick. A clearly better product always wins. Amazon prices come from Amazon's own product data and show the date and time they were retrieved. Prices at other retailers are checked by us, less often. Prices and stock can change at any time, so always check the retailer's price before you buy.
This is a Researched review: we haven't used this product. We check every specification against at least two independent sources, re-check the UK price on a schedule where we can track it automatically, and say plainly who it isn't for. Commissions never change a rating.
If this isn’t the one

Best for A full-height portable toilet to see a household through a water or power outage.
as of 4 Nov 2026, 19:07 GMT · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.
Best for Caravan, campervan and boat owners, or households wanting a compact self-contained loo for power cuts or a burst-main.
as of 4 Nov 2026, 19:07 GMT · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.
Best for A portable separating toilet for a household backup, campervan or garden room, with no water or chemicals.
as of 4 Nov 2026, 19:07 GMT · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.Free alerts for your home
Home Alerts emails you when a power cut, a Met Office warning or a flood warning covers your postcode. Free for your own home. Sign up in a minute.
Start free →