Calisen Reviews 

Why any provider would use these is baffling to me! Utterly incompetent, I don’t know whether they can do their job as getting them to actually attend scheduled appointments is impossible!

This lot had us wait in only to cancel at the last minute.
We rebooked and they cancelled again without discussion.

If these cowboys are installing your smart meter..don’t build your hopes up.

Cancelled, no one showing up or even cancelling 30 mins before the slot ends in same day of booking. I have been in this process for 6 months now still with mo gas meter reading working. Continously cancelling, I don't this I will ever solve this, the worst part is that you can't hire anprivate person to carry on the work...

Absolutely useless had a gas meter exchange booked today. Never turned up. Rang up they said the installer rang and left a voice mail and text message and rang me to say he was on an emergency call out. No phone call was received no text or voice mail either. Useless.

3 appointments missed so far for smart meter installation, each time I go to the back of the queue for another appointment. 3 times taking time out to be there, moving stuff around for access. Costing me a fortune as I am not able to get on an EV tariff until the meter is fitted. Each time excuses. They threaten to charge you £40 if you are not in or cancel with less than 24 hours notice but not willing to pay the same in compensation when they are at fault. I wish it were possible to give 0 stars.

I also wish I had read these reviews before contacting this company via Scottish power.
This company is diabolical I too waited in for hours with a no show from this company now book again for January, but I won’t hold my breath.

Came on here to see if it was just us having this terrible experience and I think I'm relieved to find we're not alone.
Today was our 4th cancelled smart meter installation appointment - generally recieved a call or text right at the end of the four hour slot. Have scheduled another but little hope they will turn up. Thankfully it's not too much trouble to wait in as my partner is currently unemployed! Still awful service and I am surprised that Ecotricity and other energy suppliers are still using them.
We have contacted Ecotricity and that have been somewhat helpful but can't offer us a different installer which is the only thing that seems like it would actually solve the problem.
Note to anyone else who's experiencing this - Ecotricity told us we're entitled to £40 compensation per missed appointment and we've so far recieved for one lot of this. Do badger your energy companies for compensation!!

I can’t give a 0 star but I would .
The only service I got was a text the night before to cancel an appointment that was made weeks before.
I got numerous emails and texts the weeks before telling me what I had to for their visit, unfortunately I can’t get the engineer out of his bed for them !

Don’t waste your time with them , use another energy supplier, going to move my business to Octopus and try again .

Horrific company. Turned up to fit a smart meter after I’d been bullied by my energy company into getting one. Waited in all day for them to turn up at 4pm and tell me they wouldn’t have time to fit one of the meters. The engineer went to the electricity meter and advised she couldn’t fit the smart meter because the fuse box was mounted on the wall and she isn’t allowed to climb a ladder (nor do they carry them). No apologies for the inconvenience at all. I’m a single parent who works from home and had to juggle my entire day to accommodate them.

Phoned Calisen to complain and was told it was my fault for booking the appointment online, as they ask about access if the appointment is booked over the telephone. How about they incorporate those questions into their online system? It’s not 1925.

I was then told that ladders would be delivered separately and I’d have to guarantee I could keep them safe and secure. Er, that’s not my job. I don’t have a secure place to store ladders, I live in a tiny terraced house.

Rude, incompetent staff. A joke of a company.

swapped my shifts to be off work today, slot for my appointment was 9am-1pm, waited in, no update. Contacted Calisen at 1pm and they said they haven’t got anyone booked to come to me, but will let me know as soon as possible. At half 2 they texted saying no one can come today. What a waste of swapping my shifts. Stayed in on my day off just waiting around for no reason.

Scottish power are not serious about getting their customers on a Smart meter.Appointment booked for between 12pm and 4pm on 31-10-2025. SMS at 2:30pm to say not "Unfortunately- Blah Blah" , no appogy, no explanation, no compensation. Wasted day as I cancelled appointments. Whole day spent emptying kitchen and hallway for easy installation access as requested. Ended up putting all back. Not sure if my new appointment will be hounered. Fingers crossed

Terrible company. Trying to get my faulty electric meter fixed, I'm stuck paying whatever it last read before it broke. Initial wait of a couple months for engineer to visit start of September, they called last minute to say it wasn't happening. Rearranged end of October, likewise. Got a text new appointment date of 5th Jan 2026. I have no faith it'll happen then either.

Don't worry about the inconvenience of having smart meters fitted. Calisen deal with this efficiently and effectively by not attending your appointment in the first place! They don't even have the courtesy to tell you. I wish I'd Googled prior to emptying our stair cupboard in anticipation. Unfortunately you can't give zero stars. To think they have the balls to say they'd charge YOU £40 for inconveniencing them!

The abuse I received from a calisen employee that was working on a neighbours property was aggressive and intimidating. I would never recommend a company that uses employees like that.

I echo everyone elses reviews... Repeatly booked appointments and no one turned up. My favourite was today when I had a cheery call from the fitter asking about parking and telling me he'd see me in 15 mins. 20 mins later a call from Callisen, saying that it had been cancelled. Impossibly hard to contact them. The fact that the tell you that if the customer cancels on short notice you will have to pay £40 is galling.

Probably the worst firm we have experienced this year. Unreliable, appointments cancelled at last minute after we’ve waited in, the remade appointments a month ahead. It has taken 6 months and 5 visits and still no fully working smart meter. It seems Ecotricity only use Calisen so its a monopoly we can’t escape. Hopeless.
On a positive note, the engineers that called were friendly, pleasant people.

The man texted to let me know he was 20 minutes away, arriving just over half way through the four hour time slot. He was very painstaking and put in a backing board for another bit of the equipment that lacked one. I live in Devon. Maybe problems people are experiencing are down to area.

I was very surprised to read all the negative reviews for this company as our experience was very positive. The engineer Don texted me the night before to double check his arrival time and parking. He arrived on time and was very friendly and polite. He explained everything he was going to do and asked if I had any questions, which he duly answered. I work from home so needed to know when the power would be off. He worked safely and quietly and notified me when to shut down the power, which was only off for 15 minutes. He did both gas and electric meters on behalf of Utility Warehouse. Once everything was commissioned, Don explained how to use the mobile control unit. He was at our property for 2.5 hours and did a great job. It's a shame to hear that this level of customer service does not run throughout the business.

I started to think it was just me,being appalled and shocked beyond about the customer service and total lack of communication from SP regarding the meter check at my home,by these Calisen people,they could tell me nothing on when these guys would turn up,I had a 3 week time frame,that came and went,contacted SP,told to phone Calisen,endeless emails to SP,I’m sure they use a respond to template that covers everything and just change your A/C nbr and name,I was horrified reading reviews but I’m not alone at least and comments from reviews honest I can relate to communication and frankly trust is out the window completely,I’ve had a smart meter for years and it works,readings go direct to SP,it plugs into a socket and if/when these MI5 Calisen men in black turn up at my home,they are getting no where near my plug in smart meter.I find it ,as I’ve said ,beyond truly shocking any energy company can continue to use these muppets,trust pilot is the best consumer tool ever invented .i cannot be certain on date this saga started but its went way past the original 3 week advised time scale

Had a really lovely Calisen employee attend my property this morning. He called prior to getting to the house, was on time, talked me through what he was doing, was incredibly polite and helpful.
Would highly recommend - thank you