30/06/2026
There’s a lot of talk about solar batteries.
Investing in a household battery sounds smart, but it might not be the best use of your capital. For less upfront cost, a Sanden Eco® Hot Water Heat Pump delivers a significantly higher, faster return on investment (ROI) – depending on how many people live in your home/how much hot water is required.
Here is why upgrading your hot water system is a smarter financial move than buying a battery.
The Thermal Battery Advantage
A Sanden heat pump acts as a highly efficient "thermal battery." Instead of storing electricity in expensive chemical cells, it stores energy as hot water. Hot water accounts for up to 30% of the average home's energy bill. By targeting this massive energy drain directly, you slash your baseline power consumption.
Faster Payback Period
• Household Battery: Typically takes 10 to 15 years to pay for itself, often outlasting its own warranty.
• Sanden Heat Pump: Usually achieves full ROI within 6 years through drastic bill reductions – again depending on how many people live in your home/how much hot water is required.
Massive Energy Efficiency
• Standard Batteries: Experience a 10% to 15% energy loss during the charge and discharge cycle.
• Sanden Heat Pump: Uses industry-leading inverter technology to consume 75% less electricity than traditional electric hot water systems.
• Coefficient of Performance (COP): Delivers up to 5kW of heat energy for every 1kW of electricity consumed.
Perfect Synergy with Solar
If you have solar panels, you do not need a battery to save your daytime generation. You can program the Sanden to run predominantly during peak solar hours. This allows you to soak up your free excess solar energy and store it as hot water for the evening, effectively minimising your hot water heating costs.
Longer Lifespan and Warranty
• Batteries: Degrade over time, losing capacity every year, and usually carry a 10-year warranty.
• Sanden Systems: Built to last with a high-grade stainless-steel tank backed by a 15-year warranty, ensuring decades of reliable savings.
