3 Ways to Power a Freezer Off-Grid in NZ (Without Mains Electricity)
3 Ways to Power a Freezer Off-Grid (Without Mains Electricity)
August 5, 2026
How to Maintain Your Califont: The Complete Guide for Off-Grid NZ
Fresh & grey water
Wheeled portable tanks and a fixed RV tank for fresh or grey water in caravans, motorhomes and tiny homes.
Our range
Four Challenger water tanks in tough high-density polyethylene: 25L and 40L wheeled tanks and a 75L fixed tank.
Our largest portable tank, with wheels and an easy-grip handle to move it full, plus a faucet and flexible pipe.
40L capacity
Fresh or grey water
Wheels and handle
Faucet and pipe included
Slides under caravans
Rigid HDPE
40L
Capacity
4.5kg
Empty weight
HDPE
Tough polyethylene
NZ-wide
Shipping or Penrose pickup
Find your fit
Recommended: 25L wheeled
Compact wheeled tanks that slide under most caravans, with an optional spout and level indicator.
Choose a model
Recommended: 75L fixed tank
A 75L fixed tank for fresh or waste water in RVs, caravans and campervans.
Choose a model
Recommended: 40L wheeled
Extra capacity for longer stays, with a faucet and flexible pipe.
Choose a model
Recommended: 75L fixed tank
A fixed food-grade HDPE tank sized for compact tiny home systems.
Choose a model
Why choose us
Every tank is suitable for fresh water supply or grey water waste.
Slim wheeled designs fit under most caravans.
Rigid, impact-resistant high-density polyethylene.
Choose a 25L or 40L portable, or a 75L fixed tank.
Rugged wheels and an easy-grip handle, even when full.
Sized for caravans, motorhomes, camping and tiny homes.
Good to know
Yes. All four Challenger tanks are suitable for fresh water or grey water waste. Use separate tanks for each.
The 25L wheeled tank is BPA-free, food-grade and UV-stabilised, and the 75L fixed tank is made from food-grade HDPE. Check each product page for details.
A 25L tank suits short trips and small caravans, a 40L tank suits longer stays, and the 75L fixed tank suits motorhomes and tiny homes.
Learn more
3 Ways to Power a Freezer Off-Grid (Without Mains Electricity)
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How to Maintain Your Califont: The Complete Guide for Off-Grid NZ
How to Maintain Your Califont: The Complete Guide for Off-Grid NZ
How to Maintain Your Califont: The Complete Guide for Off-Grid NZ