Pros:

• Energy-efficient – only heats water on demand.

• Compact design – saves wall or floor space.

• Never “runs out” of hot water.

• Fast recovery and consistent temperature.

Cons:

• Requires gas line and good water pressure.

• Higher upfront cost than electric storage.

• May take a few seconds for hot water to reach outlet.

• Produces greenhouse emissions unless on renewable gas.

Pros:

• Lower upfront cost – cheapest to install.

• Simple technology – fewer moving parts and easy to replace.

• Works in any home with power supply.

• Can use off-peak tariffs to lower running costs.

Cons:

• Highest running costs (especially on standard tariffs).

• Generates the most carbon emissions (if powered by grid electricity).

• Slower heat recovery compared to gas or heat pump systems.

Pros:

• Very low running costs – uses free solar energy.

• Environmentally friendly – reduces carbon footprint.

• Eligible for government rebates (STCs, REPS).

• Long lifespan and strong resale appeal.

Cons:

• High upfront installation cost.

• Relies on sunlight – needs booster for cloudy days.

• Roof space and correct orientation required.

• Regular maintenance (solar panels, pump, controller).

Pros:

• Uses solar as main source, electric element as backup.

• Lower running cost than standard electric storage.

• Fully electric – suitable for homes without gas.

• Qualifies for renewable energy rebates.

Cons:

• Still draws grid power on cloudy days.

• Booster element can increase running costs.

• High installation cost similar to gas-boosted.

Pros:

•  Extremely energy-efficient — up to 70% less electricity than standard electric.

• Works day or night (doesn’t rely on direct sunlight).

• Eligible for REPS & STC rebates (substantial savings).

• Environmentally friendly and quiet operation (modern units).

•  Ideal replacement for older electric tanks.

Cons:

•  Higher upfront cost than standard electric.

• Slightly longer heat-up time.

• Performance can drop in very cold conditions (depending on model).

• Requires good air circulation around unit.

Best For:
Eco-conscious homeowners looking for the lowest long-term energy bills.

Pros:

• Designed for heavy-duty or multi-outlet use.

• Can be tailored (gas, solar, electric, or hybrid).

• High efficiency with cascade or storage configurations.

• Long life expectancy and scalable capacity.

Cons:

• Significant upfront investment.

• Requires professional design and commissioning.

• Complex maintenance schedule.

• May need special gas supply or electrical upgrades.