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A survey by OCU, Spain’s largest consumer organisation (broadly comparable to Which? in Great Britain), ran among 2,813 members and supporters and was reported by El Periódico de la Energía. It puts the lack of clear information about tariff changes and updates at the top of customers’ complaints about their suppliers. Next come billing errors, discounts that are never applied, incorrect consumption and late bills.
None of these is about the price of energy. All of them are about how the supplier runs behind the scenes.
If you operate, or advise, a supplier with an eye on Spain, this is worth reading closely. It shows where customers in this market lose patience, and where a new entrant can win or lose trust early.
What the survey says
When something goes wrong, the response doesn’t land either: two in three affected customers were unhappy with how their issue was resolved. The worst ratings came when a service was activated without the customer asking for it, or when switching or start-up of supply was delayed.
And yet 82% of respondents had not switched supplier in the previous twelve months, and six in ten had been with the same supplier for over three years. OCU also warns that some customers can pay up to 30% more than other customers of the same supplier, because of successive tariff updates or because they stay on uncompetitive contracts.
A word of caution: this is a survey of OCU members and supporters, not a representative sample of all Spanish consumers. But the pattern of complaints is consistent, and it will sound familiar to anyone who has run a mid-sized supplier in Great Britain too.
Where these failures tend to start
The survey describes symptoms, not causes. What follows is our own reading, based on day-to-day work with electricity and gas suppliers in Spain.
→ Poorly communicated tariff changes
Explaining a tariff change properly requires the price catalogue, the contract and the customer record to sit in one place. When each lives in a different system, or in a spreadsheet, the communication goes out late, incomplete, or not at all.
→ Billing errors, discounts and consumption
The bill is the last link in the meter-to-cash chain. Reads arrive from the distribuidoras (Spain’s distribution network operators, the equivalent of DNOs) and are matched against contract terms and discount rules. If a rule is misconfigured, or a read isn’t validated before billing, the error reaches the customer. It isn’t a calculation problem. It is a process problem.
→ Late switches and unrequested services
In Spain, a switch depends on ATR messages (third-party network access requests) exchanged with the distribuidora that owns the network at that supply point. When rejections are handled by hand, the switch slips. And a service activated without the customer asking for it usually points to a sign-up journey with no clear record of consent.
→ Loyalty by inertia
Staying put isn’t the same as being satisfied. In many cases it is inertia, and inertia expires. OCU’s collective energy purchase scheme has already passed 18,000 sign-ups, which shows that when consumers do move, they move together and they compare.
For a supplier, that changes the maths. Every billing error or late switch stops being an isolated incident and becomes one more reason for the customer to stop putting up with it.
What this means if you are looking at Spain
Three structural differences from Great Britain shape how these failures arise, and how a new entrant should plan around them:
- No single central switching service. There is nothing comparable to the CSS. ATR messages go to the distribuidora serving each supply point, and Spain has dozens of them.
- The supply point identifier is the CUPS. It plays the role that MPAN and MPRN play in Great Britain, and it is the key for contracts, reads and switches.
- Consumption data comes from the distribuidoras and from Datadis. Reads reach the supplier as files and through the platform where customers authorise access to their own data, so validation before billing matters even more.
QUIXOTIC is a cloud ERP for electricity and gas suppliers, built for the Spanish market. It brings CRM, sign-up, automated switching and DNO messaging and energy billing into one environment, already connected to dozens of distribuidoras. The data you configure once is the data used at every step, with no parallel processes.
Conclusion
Customer trust is won in unglamorous places: the right bill first time, a switch that completes on schedule, a tariff change explained clearly. Behind each one is a process that either works or doesn’t.
Planning to enter the Spanish market? Book a demo with QUIXOTIC and see how it works in one environment.
Frequently asked questions
What are the main complaints from energy customers in Spain, according to OCU?
OCU’s survey of 2,813 members and supporters found that the main complaint is the lack of clear information about tariff changes and updates. Billing errors, discounts that aren’t applied, incorrect consumption and late bills also stand out.
Why do billing errors happen at energy suppliers?
They usually start in the process rather than the calculation: unvalidated reads, misconfigured discount rules, or contract and tariff data spread across several systems. The more manual the cycle between the read and the bill, the more likely an error becomes.
Why are switches and start-ups of supply delayed in Spain?
A switch requires an exchange of ATR messages with the distribuidora, including validations and possible rejections. Delays tend to appear when rejections are handled manually instead of automatically.
How can a supplier reduce customer-facing incidents?
By holding tariff, contract and customer data in one environment, automating validations before billing, and handling ATR messages without manual intervention
Omar Sequera: Technology Consultant specialized in Energy
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