Immersun 

Waited over a week for replacement unit. On arrival found to be missing antenna and fuse units so still not having the ability to use the solar power system. I have also been informed that although my original warranty finishes at the end of September this year and Immersun have had to replace the unit as it blew up, I am not entitled to a new 1 year warranty for the new unit!!!!!!!!

I Bought the original immersun device in 2011 and it served me well for 10 years. A couple of contacts were worn so we replaced the device. Provides 2 immersions with all our hot water . Very efficient

I've had the Immersun now for about 6 years, and it's been heating my hot water without an issue. The only problem I've had recently is logging into the app, and Anish is helped each time. THANKS

I had a smart meter installed by the utility company and following that the Immersun stopped working. A couple of emails to Anish and a reset of the config and I now have a tankful of hot water again. Thank you. It's most satisfying having a bath with solar-heated water.

I had issue with my app and Anish managed to help me with all my issues within 5 minutes ! Super happy !

D.

If I could give this product zero stars I would, before you think of buying immersun read the 1 star reviews. All having the same problem burning at. At my cost I’ve had to get an electrician out and because of covid and shielding the electrician has only just been able to come out. Now I have been told I’m out of the one year warranty by a month (at least the pandemic worked in immersun’s favour) and like so many other people. They are saying I have to pay for repairs and waste more money, yet I have registered for the 3 year warranty. This company are thefts and sell substandard products. Next stop trading standards for selling faulty goods, that are dangerous burning out, thank goodness for the circuit breaker. Their customer services is appalling and ignore replies on emails. So save your money and go to a company that cares about its customers and the products they sell.

Had a problem with the internal clock on my immersun. Opened a ticket with Immersun customer service and they replied within 24 hrs with a solution. All is well now thanks to Anish M. Couldn't fault the service given. Thankyou

Excellent Service, fast delivery!

Returning customer
The unit was similar to my previous Immersun and was easy to install, however the casing retaining screws were far to tight and could not be undone with a normal phillips screwdriver, I had to resort to a pair of pliers to slacken them of, otherwise I would have damaged the screw heads.
Never had this problem before.

Tony Holliss 20/05/21

E mailed with a few questions. Received a quick response with positive answers to my questions. hopefully I have resolved my issues but I am sure they will give me further help should I require it.

Initial Immersun, purchased 2015, failed.
The replacement was an easy swap. 2 screw on the wall and 3 plug sockets for the electrics. Everything was compatible. So an easy, simple reinstall.

Excellent support call from Anish and the Immersun support team.

My Immersun has failed twice in less than 2 years and the second failue was a catastrophic fireworks display. It is slightly reassuring that the explosion that occured was contained within the casing. However, I was sat some 5 metres away, around a corner, not in line of sight and the Immersun is inside a cupboard and yet I saw a large diffuse flash in the kitchen area, accompanied by a very loud bang so it clearly was a very serious incident.

I logged the fault with Immersun "support" and they say the product is out of warranty and they offered to attempt a repair at £132 or to offer a discount on a new model.
They seem unconcerned by this incident, which suggests to me this is not a one off incident.
They also implied that an additional voltage regulator should be included in the circuit to protect the Immersun but there appears to be no indication in the installation part of the supplied manual that any such additional voltage regulation is required or advised.

I drew their attention to this extract from the National Grid / DNO documentation:-

Appliances manufactured to European Standards are built to withstand very short duration voltage rises up to 2000 volts. Rises such as this are a normal part of the operation of a supply distribution network and can be generated by customers' electrical equipment and also as a result of lightning or switching operations. Modern appliances are normally fitted with internal protective devices to limit damage to electronic components. All appliances sold in Europe are designed to operate safely and efficiently within the statutory voltage limits. Manufacturers usually allow a further margin of safety and, if the voltage does occasionally fall outside these limits, there should be no adverse effect on your appliances. In the UK, the declared voltage and tolerance for an electricity supply is 230 volts -6%, +10%. This gives an allowed voltage range of 216.2 volts to 253.0 volts.

I further confirmed that the solar PV inverter that was correctly installed to feed the Immersun and the grid has an internal surge protector and uses a grid monitoring function that immediately shuts the inverter down if the supply side voltage deviates outside of the G99 parameters which includes both the upper and lower voltage limits described above and the frequency limits of 48 to 52Hz. The Solar system and the inverter are still running perfectly normally.

I will not be availing myself of any of their suggested offers/options as I see little point in wasting more money on a product that has failed twice in less than 2 years of operation within its designed parameters and for no obvious reason.
The second failure was deeply shocking and alarming and does not inspire any confidence that their product is safe or reliable.

Frankly if I was not busy with other more important matters I would be pursuing compensation under consumer protection legislation, both under fitness for purpose and safety laws.

I do not recommend anyone buys this product unless they like surprise fireworks displays.

Product Serial Number 3270.

Excellent repair service. Quick turnaround

Servers continually crashing with loss of service for app. Chasing Immersun for updates they respond with the below. Says it all! Moving to MYEnergi EDDI

Immersun statement “ action taken regarding the matter is solely at the discretion of management and I am prevented from commenting any further on this.”

Make your own judgement, but that is unacceptable statement from any front facing service provider.

I have just bought my second immersun because I have always found there technical support to be excellent.

When you have a problem they clearly and honestly explain your options which is a refreshing change. I find many companies only want you to buy a new product or offer a repair service at a high cost.

Immersun device has saved me quite a bit of electricity because it redirects my Solar panel generated electricity to heat my hot water tank and then a supplementary slime line electric heater in the hallway.

Living near the North Yorkshire coast can be chilly at times so free energy is always a plus.

Interested to read the reviews as I had my Immersun installed in 2015. It has been excellent but I was having difficulty getting any support. I raised a support ticket weeks ago and no response. I tried to create an account, when I clicked on the email verification I got an error 404 page not found. I discovered that they seemed to be owned by Sisem so I tried their number – the automated voice says that the number is not currently set up to receive inbound calls. However, as I saw that there were many good, recent, reviews on Trustpilot I wrote my own review along the lines of great product but no support. Remarkably I had an email response very quickly from their support. It seems my Immersun is an obsolete product from the old company which went bust. There is support but they are currently very busy. So happy to edit this review to reflect that fact. I guess they will get around to updating the website when they get staff back from furlough.

Plenty of helpful advice via email, really quick service and delivery. Very impressed.

Have been using Immersun for years now; it's a fantastic device and everyone who has solar panels (and a hot water tank) should definitely have one of these units. We've got ours heating a tank full of hot water (thermostat set high so we get the most from the system), and then driving a heater in the lounge once the hot water is fully up to temperature. For the majority of the year, the boiler never comes on to heat the hot water. The system has saved us many hundreds of pounds. Easily.

We recently had a problem with the remote monitoring app, but a quick contact using their support page on Sunday, and Anish sorted it out for me the next day. What service!