TRUSTED BY THOUSANDS OF UK HOMEOWNERS
Why are you still paying for hot water?
Save and invest for your future. IMMERSUN makes it easy. Turn daylight into free hot water by using 100% of your generated solar energy!

WIRELESS SENSOR
Accuracy for you
iLINK
Control your IMMERSUN
Our chance to give you control over your IMMERSUN, see the power that you’re saving and how much you’re using all from your smart phone from the MYIMMERSUN app.
Our Money-Saving Experts
Turn the heat down on your energy bills.
Working from home means you’ll use more heating and lighting, and that could add an extra £111 to your energy bills.
We help you do your bit for the planet with your energy, make the most of your 100% renewable electricity. All very simple to manage with support if you need it from our UK-based team.
Follow IMMERSUN on Twitter.
Stay in touch for little tips, tricks and insights into making your home, work for you.
WHAT MAKES US DIFFERENT
Friendly Support and Advice.
We work in association with YouGen and the National Energy Foundation (NEF). Both organisations are at the forefront of research and innovation in understanding energy use and helping householders save energy and money. We’ve learnt a thing or two along the way and we’re excited to do things a bit differently.
CUSTOMER TESTIMONIALS
Don’t just take our word for it.
“This is a fantastic piece of kit. The electrician who fitted mine was very impressed with the build quality, documentation, ease of installation and setup. It was up and running in no time. The first full day of running saw it divert 5.6kWh into my hot water tank and the total recovery for the first week has been 20kWh (and I have a battery system so I’m already utilising most of the PV anyway).”
Rock-solid product — G. Hex
“If you have an east-facing solar array (like mine) then this device is a godsend. All that otherwise excess solar power generated early in the morning now converts into a tank full of hot water. In my case, I spend a lot of time in the same room as the IMMERSUN and the fan noise is a reassuring reminder of the bucketloads of solar power I’m generating!”
Love this product — Tim R.
“Only one word to describe it really – brilliant. Last year we tried to put immersion heaters on when the sun shone ourselves. This worked to a certain extent but to have them being heated at a lower wattage up to thermostat point throughout the day is so cost-effective and hassle-free. The app is easy to understand and knowing we are being paid to heat our water and whilst also saving on electric/oil costs gives you a great feeling.”



