Ireland Cru Smart Meter Time Of Use Tariffs And Solar Optimization Guide

Updated 6 September 2026 · By SolarNevs Research Desk, Dealer surveys + verified sources · 2 sources · Method ↗

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Key Takeaways

  • Over 2 million smart meters have now been installed in homes and businesses across Ireland under the national rollout.
  • By statutory mandate, all electricity suppliers must offer you a Time of Use tariff.
  • Time of Use tariffs establish a time-based billing structure under which the rate charged for each unit of electricity consumed can vary depending on the time of the day.
  • A typical smart meter tariff has three rates: a day rate, a night rate, and a peak rate.
  • Meter Configuration Code MCC16 governs standard bi-monthly smart billing, while MCC12 enables half-hourly interval settlement.
  • A customer who has moved to a time of use tariff can move back to a flat rate tariff at any time.
  • Interval data is recorded every 30 minutes, encrypted, and securely stored in a central Meter Data Management System operated by ESB Networks.

National Rollout and Regulatory Mandate

Ireland's energy transition is underpinned by the National Smart Metering Programme (NSMP) overseen by the Commission for Regulation of Utilities (CRU). Today, over 2 million smart meters have now been installed in homes and businesses across Ireland.

The regulatory framework guarantees access to flexible billing:

  • Supplier Obligation: All electricity suppliers must offer you a Time of Use tariff.
  • Service Nature: A Time of Use tariff is a smart service that means the cost of electricity changes depending on the time of day.
  • Macro Benefits: Moving to a cheaper off-peak time also makes room for renewable power in our national grid.

Understanding Time of Use Structure and Meter Codes

Under the CRU glossary, a time of use tariff (TOU) is a time-based billing structure under which the rate charged for each unit of electricity consumed can vary depending on the time of the day.

Tariffs categorize diurnal consumption patterns into distinct pricing periods:

  • Three-Tier Architecture: A typical smart meter tariff having three rates: a day rate a night rate and a peak rate.
  • Consumer Protection: In Ireland, customers retain tariff flexibility: a customer who has moved to a time of use tariff can move back to a flat rate tariff at any time, where a flat rate tariff is a 24-hour tariff the unit rate is the same no matter what time of the day electricity is consumed.

National metering infrastructure utilizes standardized Meter Configuration Codes (MCC) to classify service capabilities:

Meter Configuration Code (MCC)

Operating Mode

Data Resolution & Transmission

Solar & Battery Application

MCC01

Standard 24-hour analogue / digital

Single cumulative reading

Legacy flat-rate billing

MCC02

Day / Night dual tariff

Dual register (day/night)

Legacy night-storage heating

MCC16

Standard Smart Tariff

Collected every two months and displayed in day, night and peak intervals

Domestic solar self-consumption

MCC12

Half-hourly Time of Use Tariff

Collected every half hour and displayed in day, night and peak intervals

Dynamic commercial solar & BESS arbitrage

As defined by the CRU:

  • If you're on a Standard Smart Tariff then your meter configuration is MCC16 and your consumption data is collected every two months and displayed in day night and peak intervals.
  • If you're on a half-hourly Time of Use Tariff then your configuration is MCC12 and your consumption data is collected every half hour and displayed in day night and peak intervals.
  • Comparatively, a 24-hour meter has a code of MCC01 and a day or night meter has a code of MCC02.

Solar PV and Battery Storage Optimization

Integrating smart metering with solar PV arrays and battery energy storage unlocks demand response:

  • Demand Response Defined: Demand response refers to the capability of smart grid technologies to allow for reductions in electricity use targeted at times when demand is highest.
  • Interval Data Recording: Your smart meter will collect data on your electricity use every 30 minutes.
  • ESB Networks Operations: Every day ESB Networks will collect data from your smart meter. This will state the amount of electricity used over the last 24-hours.
  • Data Security Standards: All smart meter data collected is encrypted and will be securely stored in a central Meter Data Management System operated by ESB Networks.

By charging battery storage systems during low-cost night intervals and discharging during evening peak hours, commercial and domestic premises maximize solar self-consumption while dampening peak network loading.

Frequently asked questions

Are electricity suppliers in Ireland legally required to offer Time of Use tariffs?

Yes, under Commission for Regulation of Utilities (CRU) rules, all electricity suppliers must offer you a Time of Use tariff.

What is the difference between MCC12 and MCC16 meter configuration codes?

On a Standard Smart Tariff your configuration is MCC16 with data collected bi-monthly in day, night, and peak intervals. On a half-hourly Time of Use Tariff your configuration is MCC12 with data collected every half hour.

Can a consumer switch back from a Time of Use smart tariff to a flat rate?

Yes, a customer who has moved to a time of use tariff can move back to a flat rate tariff at any time.

How frequently does a smart meter record electricity consumption?

Your smart meter will collect data on your electricity use every 30 minutes, with ESB Networks collecting 24-hour summary data daily.

References

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