Gravity, hand pump or 12 V: the water has to move somehow · review
ECtury 20 litre solar bag, 45 °C in three hours stated review
A gravity solar bag with a temperature and a heating time attached to each other — 45 °C after three hours — and a flow switch on the head, which most bags here do without.
The bottom line The gravity bag that answers both halves of the heating question and puts a switch where your hand already is.
What this listing puts on record
A 20 litre PVC solar shower bag, given also as 5 gallons, stated to absorb sunlight efficiently and reach up to 45 °C in three hours. The shower head is described as an improved design with a strong flow and a built-in switch for the intensity. A PVC hose, a bracket and a rope system for hanging in tents or from branches are supplied, and the bag is described as light and foldable.
What kind of shower this is
A gravity bag. There is no pump and nothing to charge; the flow comes from hanging the bag and the warmth comes from the sun. What separates this one from the plainer bags in this hub is not the water — it is the switch.
The pairing that matters
45 °C and three hours, published together. A temperature with no time is a promise and a time with no temperature is a wait. This listing gives both, and states the condition — direct sunlight — that the pair depends on.
What the listing omits
No hose length. The bracket and the cord are described; the distance from the bag to your head is not.
No weight and no packed size, on a bag whose portability is one of its five selling points.
Before you hang it
Twenty litres is about 20 kg of water hanging above you. A bracket that holds an empty bag proves nothing about a full one, and this is a shower rather than a way of making water fit to drink.
Availability
Selling between 12 € and 17 € across the German, French, Italian and Spanish Amazon stores when this page was checked.
It also sells on the British Amazon store in the local currency, which the range above does not cover — that range counts euro stores and nothing else.
Nothing came back from the American Amazon store, so the buy link there opens a local search instead of a page that is not there.
Every figure in this section is what Keepa returned on the day this page was last updated. Prices and offers change without notice.
Prices quoted in this text were read on 6 September 2026. The live price is at the top of the page.
What it does well, and where it gives way
Strengths
Publishes a temperature and a heating time together — 45 °C in three hours — rather than one without the other
A flow switch on the head, which is what makes a fixed volume of water last a whole wash
A bracket and a rope system for hanging in a tent or from a branch are both stated as supplied
Compromises
No hose length, so how high the bag must hang for the head to reach is left open
No weight and no packed size, on a bag sold on being light and foldable
The 45 °C is stated for direct sun over three hours, which is a best case rather than a working figure
Specifications
Shower type
Gravity solar bag — a 20 litre PVC bag hung and warmed by sunlight, stated to reach 45 °C in three hours
Capacity
20 litres — stated, and given as 5 gallons
Pump power source
No pump — the flow comes from hanging the bag, stated
Stated run time per charge
Not published on the listing — there is nothing to charge, and no shower duration is given for the 20 litres
Hose length
Not published on the listing — a PVC hose is supplied and never measured
Head type
Shower head the maker describes as improved, stated to give a strong flow
Flow control
A switch built into the head to set the flow strength — stated
IP rating
Not published on the listing
Fill opening
Not published on the listing
Packed weight
Not published on the listing — the bag is called light and foldable, with no figure
Amazon reference
B08YP3H7GT (same reference on 5 Amazon marketplaces)
EAN
0616430627320
What people ask before buying
How warm is 45 °C?
It is hot tap water, and it is the figure the maker publishes for three hours of direct sunlight. Two bags in this hub publish the same pairing and one publishes a heating time with no temperature at all. All three figures describe full sun, not an overcast afternoon.
What does the flow switch change?
It lets you stop and start rather than draining the bag in one go. On a gravity shower with a fixed 20 litres and no way to add pressure, that is the difference between one rinse and a whole wash, and only two of the bags in this hub describe any form of control at all.
Mains-heated electric shower · 15 litre collapsible tank · 220 V 2000 W heater · 42 °C in 15 minutes stated · warm up to 3 hours stated · 3 or 4 litres per minute · 1.8 m hose
The only shower in this hub that heats its own water — a 15 litre collapsible tank with a 220 V heater, which means mains power or a 2000 W inverter before anything happens.
Best for: A camper van or a caravan with an inverter or a hook-up, where hot water on demand is worth carrying a heater for.
Gravity solar bag · 20 litres · no pump · hand-held head on a flexible hose · carry handle · no hose length, no weight, no ingress rating
A gravity solar bag: fill 20 litres, hang it in the sun and let height do the work — with no hose length, no weight and no shower duration published anywhere.
Best for: A sunny pitch beside the car, rinsing off sand or sweat, where a hanging point is easy to find and simplicity is the point.
Rechargeable pump unit, no tank · 3 or 4 litres per minute · 4800 mAh · IPX7 · shut-off valve on the head · built-in water filter · no run time, no hose length, no weight
A pump rather than a bag, carrying the highest ingress rating in this hub at IPX7 and a shut-off valve on the head — and publishing no run time at all.
Best for: A pitch or a van with a water container on site, where a shut-off on the head and a rating that survives immersion matter more than a published run time.
