Heat pump, gas, electric or solar hot water in Byron Bay
Compare electric, gas, heat pump and solar hot water for a Byron Bay home in 2026: installed price ranges, running costs, roof needs and the NSW discount.
For most Byron Bay houses with somewhere outside to put a tank, a heat pump costs the least to run of the common types and can qualify for the NSW Energy Savings Scheme discount, but it costs the most to put in. Electric storage is the cheapest to install and the dearest to run. Gas suits a home already set up for bottled or network gas, and solar suits a sunny, strong roof with room for collector panels.
This page sets the four types side by side so you can narrow the choice before anyone quotes. Byron Bay Plumber is a referral website, so the provider you are put in touch with gives the advice on your house and does the installation; you can read how that arrangement works on the about page.
How do the four hot water types compare side by side?
The installed ranges below are published estimates, not quotes. The electric, gas and heat pump rows come from a Byron Bay price page verified in October 2026. The solar row is an Australia-wide figure from hipages that says it already allows for average grants.
| System | Installed range | Running cost (hipages estimates) |
|---|---|---|
| Electric storage | $840 to $3,150 | Highest of the four |
| Gas storage | $1,250 to $3,675 | Middle, and wide: depends on natural gas or LPG |
| Heat pump | $3,150 to $6,300 | Low |
| Solar (boosted) | $3,000 to $7,000 | Low, varies with booster and tariff |
How each type is powered, where it sits, whether the NSW Energy Savings Scheme discount can apply and which licences the job needs:
- Electric storage: mains electricity, often on an off-peak tariff. Fits inside or outside. No Energy Savings Scheme discount. A plumber installs it, with an electrician for the wiring.
- Gas storage: network gas or LPG cylinders. Goes outside, with clearances for the burner and flue. No Energy Savings Scheme discount. Needs a plumber and a licensed gasfitter.
- Heat pump: electricity that moves heat from the air into the water. Goes outside, with airflow around the unit. The discount can apply when it replaces an eligible electric or gas unit. A plumber installs it, with an electrician for the wiring.
- Solar (boosted): sun on roof collectors, with an electric or gas booster. The tank sits on the ground or the roof, and the collectors need a sunny roof face. The discount can apply when it replaces an eligible electric or gas unit. Needs a plumber, roof work and wiring.
The full set of plumbing price bands, including drains, tanks and gas points, is on the Byron Bay plumbing cost guide.
What decides the running cost?
The hipages solar hot water guide gives indicative yearly running costs for a four-person household. In those estimates electric storage sits highest, gas sits in a broad middle band that depends on whether you use natural gas or LPG, and heat pumps and boosted solar sit lowest. The same guide says heat pumps use about 75 per cent less energy than conventional electric water heaters.
Four things move your own bill more than the label on the tank:
- How many people use it. hipages cites Sustainability Victoria’s estimate of roughly 50 litres a person each day.
- Your tariff. Off-peak electricity, peak electricity, LPG by the cylinder and network gas are all priced differently.
- When it heats. A unit that heats overnight on off-peak power costs differently from one heating in the middle of the day.
- Booster use. A solar system in a run of wet weather leans on its booster, so the booster fuel matters.
Which type suits a home with rooftop solar panels?
A heat pump runs on electricity, so a household generating its own power during the day can often set it to heat while the panels are producing. Whether that is possible depends on the model, so ask the installer whether the unit offered has a timer or a solar mode. Electric storage can also be timed, but it uses far more energy for the same hot water, so it soaks up more of what the panels make.
Solar thermal collectors compete with photovoltaic panels for roof space. On a small cottage roof that already carries a full set of panels, a heat pump on the ground is usually the simpler fit.
What about a holiday let that fills up in peak season?
A Byron Bay holiday let may sit empty for weeks and then sleep a full house over summer and Easter. Size the tank for the busy weeks, not the quiet ones, or guests will run out of hot water after the third shower. Two points are worth raising with any installer:
- Recovery time. Ask how long the unit takes to reheat a full tank. Recovery rates differ between models and fuel types, and a slow one may need a larger tank to cope with back-to-back showers.
- Who is on site. A heat pump timed to the middle of the day suits a house where people are home or the load is predictable. A rental used mostly in the evening may suit a different setting.
Where does gas fit in?
A gas storage or continuous flow unit can suit a house that already has a gas supply and an outdoor wall with enough room for flue clearances. Network gas is not available in every street, so check with a retailer; a house without a connection uses LPG cylinders, which brings delivery charges and the need to watch the gauge.
All gas work in NSW has to be carried out by a licensed gasfitter. According to the NSW Government gasfitter guide, the gasfitter must give you a certificate of compliance for network gas, or a certificate of inspection for bottled gas, and every gas appliance sold or installed in NSW must be tested, certified and labelled. Connecting, moving or extending a gas line is covered on the gas fitting page.
How does the NSW Energy Savings Scheme discount work?
The scheme takes money off the installation price when you switch an existing water heater to an efficient heat pump or solar unit. It is shown as a discount in the installer’s quote rather than paid back to you later. According to NSW Energy’s hot water upgrade page, it is open to households and small businesses with no current closing date, and a tradesperson can only offer it if they work with an Accredited Certificate Provider.
Points to know before you compare quotes:
- The discount does not apply when you replace an electric storage unit with another electric storage unit, or gas with gas.
- The amount depends on what you are replacing, the installer, your location and the model, so two quotes for the same tank can differ.
- NSW Energy advises asking about system size, location, noise and warranty for each model offered.
- Heat pumps with an average insulated storage of 700 litres or less must carry at least a five-year warranty against defects under the scheme rules.
- Unsolicited door-knocking to sell these upgrades has been banned.
The heat pump hot water page covers how a heat pump or solar install is run from site check to sign-off.
What does a careful installer check before recommending a type?
Expect a provider to look at your current unit and site before naming a model. A careful one will:
- read the compliance plate on the old unit for its type, size and age;
- check where a new unit can stand, how far it is from bedrooms and the neighbours’ windows, and whether a fan can be heard there;
- test the incoming water pressure and fit a pressure limiting valve where it is needed;
- plan where the relief valve drain will run, so it falls all the way and discharges where it cannot scald anyone or damage the building;
- for gas, confirm the supply type and the flue clearances;
- for solar, check the roof direction, shading and framing.
The relief valve and pressure points are the ones Building Commission NSW lists as common faults in its heat pump installation advisory note, which cites AS/NZS 3500.4. Every plumber doing the work must hold a NSW licence, and the steps for checking one are on the about page.
Which type fits which Byron Bay household?
- Family home with rooftop panels and someone home during the day. A heat pump timed to solar hours is usually the strongest case, with the scheme discount reducing the upfront gap.
- Holiday let that runs full in peak season. Size for peak occupancy first. A large heat pump or a gas unit with quick recovery are the usual options; ask about recovery time in writing.
- Small unit or granny flat with no outdoor space. An indoor electric storage unit or a compact continuous flow unit may be the only practical choice.
- Hinterland house already on LPG. A gas replacement keeps the existing connection, but compare it against a heat pump once cylinder costs are counted.
- Unit has failed and you need hot water this week. A like-for-like electric or gas replacement is usually the fastest. The hot water systems page covers repairs and straight swaps.
Next step: help a provider recommend the right type
Take a photo of the compliance plate on your current unit, showing its brand, capacity and fuel. In the enquiry, say how many people live in the house or how many it sleeps in peak season, and whether the house has rooftop panels, with their size if you know it. Mention where a new unit could stand and whether you already have gas. With that, send a hot water comparison enquiry and a provider can tell you which types suit the house before quoting.
Frequently asked questions
- Is a heat pump noisy enough to bother neighbours in Byron Bay?
A heat pump has a fan and compressor, similar in kind to an air conditioner's outdoor unit. How noticeable it is depends on the model and where it sits. On a tight town block, ask the installer for the model's published sound level and place the unit away from bedroom windows, yours and the neighbours'.
- Can I get the NSW discount if I replace an old heat pump with a new one?
The scheme is aimed at switching from an existing electric or gas water heater to an efficient heat pump or solar system. Eligibility rules are set by the scheme and checked by the installer and their certificate provider, so ask the installer to confirm in writing whether your replacement qualifies before you accept the quote.
- Does a solar hot water system still work in a wet Northern Rivers summer?
Yes, but in long runs of cloud and rain it relies more on its electric or gas booster, so running costs rise in those weeks. When comparing solar with a heat pump, ask how the booster is controlled and what fuel it uses, because that decides the cost on wet days.
- How long does a hot water swap usually take?
A like-for-like replacement in the same position is often finished in one visit. Changing type, for example from electric to heat pump or gas, can take longer because the new unit may need a new position, a new power circuit, a gas line or a different drain. The installer can give a better idea once they have seen the site.
- Which hot water type lasts longest?
Life depends on water quality, maintenance and the model as much as the type. For any type, ask what the warranty covers on the tank and on parts, and how often the installer suggests checking the relief valve.