Heat pump and solar hot water systems are both energy-efficient alternatives to traditional electric or gas water heaters – but which is better for your home? While a heat pump operates like a reverse air conditioning unit, a solar hot water system uses solar radiation.
They’re both efficient operators and cost-effective when compared to other options, but how do you decide which one is right for you? The key differences between the two include flexibility, setup, and installation cost.
Table of contents
At A Glance: Key Differences Between Hot Water Systems
| System | Ideal Usage | Key Benefit | Look out for… |
| Heat Pump | Homes located in shady areas or that don’t receive much direct sunlight. | Operates efficiently in mild climates. Operates more efficiently in cold weather. | They are on the noisier spectrum, so consider an ideal location to limit disruption. |
| Solar Hot Water | Sunny roofs | Low running costs in the long term. | The initial installation costs and location; the system requires direct sunlight for optimal performance. |
Heat Pump Vs Solar Hot Water: The Full Breakdown
| Feature | Heat Pump | Solar Hot Water |
| Initial cost range | $3,000-$4,000 | $4,000-$6,000 |
| Running cost range | Low | Very low |
| Maintenance | Moderate maintenance required (annual valve activation and a full-service every five years) | Low maintenance required |
| Roof space | Not applicable | Required |
| Climate suitability | Most suitable for mild climates | It depends on the power of the sun, so a sunny climate is necessary. |
| Lifespan | 10-15 years | 15-20 years |
Which System Costs More Upfront?
A solar hot water system has the largest upfront cost, typically starting at the same price tag as the heat pump tops out at. However, don’t let the initial price tag dissuade you from a solar system.
Heat pumps typically have higher ongoing costs, so in the long term, the costs tend to balance. This is especially true if you live in a sunny climate and your roof area captures the sun.
Which One Is Easier To Install?
Heat pump systems have a much simpler installation process than solar hot water systems, as the latter depend on solar panels. As solar panels operate best in direct sunlight, they are installed on your roof.
If your roof isn’t capable of handling additional weight, it may need additional support, which will only increase the cost and complication of the installation process. Heat pumps are straightforward to install in larger HVAC systems
Why Your Choice of Hot Water System Matters
There are several factors to consider when deciding which system is right for you, and the risk of choosing poorly could saddle you with an inefficient system that runs your energy bills up and leaves you with heating and cooling problems.
Expert tip: At Go Solar Quotes, we often hear from homeowners who regret not considering the local climate when choosing a system, particularly in cooler parts of Australia like Tasmania or Victoria, where solar systems often struggle to perform efficiently.
What Rebates Are Available for Heat Pumps and Solar Hot Water?
If you are eligible for one rebate, it’s possible you’re eligible for other rebates. While you may not be able to claim several at the state or federal level, you might be able to claim one state and one federal rebate.
Federal Programs
Federal rebates are available in the form of small-scale technology certificates STCs.
State Programs
While you can track down state rebates for yourself, if you’re going solar, then the installer or seller will likely handle the rebate on your behalf to sell you the system at a discounted price. Additionally, some manufacturers may have rebates or discounts to offer. It never hurts to ask. You may be eligible for a loan or grant to cover part or all of the cost of making an energy-efficient household upgrade.
The Clean Energy Regulator details the requirements to qualify for rebates. In New South Wales and Victoria, both solar hot water and heat pumps are accredited by the Essential Services Commission, and you can find out whether your system is eligible.
When To Choose Each
| Use When… | Heat Pump | Solar Hot Water |
| Your roof space is limited | ✅ | ❌ |
| You value quiet operation | ❌ | ✅ |
| You live in a cooler climate | ✅ | ❌ |
| You live in a sunny climate | ❌ | ✅ |
| You are retrofitting an older home | ✅ | ✅ |
Is A Heat Pump A Better Choice For Units?
It can be a suitable choice, but the installation process is more complex than heat pump installation in a home, so it’s best to speak to an installer before making any decisions.
Does Solar Still Work In Winter?
Yes, if you install them in a sunny climate. Daylight hours are shorter during the winter months, and cloud cover can impact how much power it draws.
Tips for Choosing And Installing The Right System
- Check roof orientation to ensure it’s suitable for solar hot water installation
- Ask the retailer or installer about heat pump noise levels to ensure it’s suitable
- Always compare the available rebates and STC entitlements before you purchase
- Get quotes from installers accredited by the Clean Energy Council
- Install solar power in cooler climates
- Accept the first quote you receive
- Choose before you check out your rebate options
- Assume your roof can handle a solar hot water system without an inspection
Final Verdict: Heat Pump Or Solar Hot Water?
When you break down all the pros and cons, it’s clear that both heat pumps and solar hot water systems are efficient operators. However, the best fit depends on your budget, roof space, and climate. Why not discuss your options with Go Solar Quotes to ensure you get a range of quotes and ideas about your options?
