---
title: "Blog Holaluz: energía y sostenibilidad"
description: ¿Quieres conocer lo último sobre autoconsumo, descubrir curiosidades tecnológicas o entender tu factura de la luz? En nuestro blog tienes todo eso y mucho más.
---

- About us 
  
    - [About us](https://www.holaluz.com/en/about-us/)
    - Opinions holaluz 
      
          - [Electricity rate reviews](https://www.holaluz.com/en/electricity/reviews/)
          - [Solar panel reviews](https://www.holaluz.com/en/solar-panels/reviews/)
    - The Rooftop Revolution 
      
          - [Green energy](https://www.holaluz.com/en/green-energy)
          - [Energy transition](https://www.holaluz.com/en/energy-transition/)
          - [A fair electricity](https://www.holaluz.com/en/fair-energy/)
    - [Recommend a friend](https://www.holaluz.com/en/holaluz-friends)
- Electricity rates 
  
    - Electricity tariffs 
      
          - [All our electricity rates](https://www.holaluz.com/en/electricity/electricity-tariffs/)
          - [Flat rate](https://www.holaluz.com/en/electricity/flat-tariff/)
          - [Electricity rate with surplus compensation](https://www.holaluz.com/en/solar-panels/self-consumption-with-surplus-rate/)
          - [Electricity time bands](https://www.holaluz.com/en/electricity/time-bands/)
    - [Electricity price today](https://www.holaluz.com/en/electricity/electricity-price-today/)
    - [Calculate power](https://www.holaluz.com/en/electricity/calculate-power/)
    - Maintenance and repair 
      
          - [Electrical maintenance](https://www.holaluz.com/en/electricity/electrical-maintenance/)
          - [Electrical fault repair](https://www.holaluz.com/en/electricity/electrical-faults/)
- [Gas rates](https://www.holaluz.com/en/gas-rates/)
- Solar panels 
  
    - [Solar panels installation](https://www.holaluz.com/en/solar-panels/)
    - [Solar panel prices](https://www.holaluz.com/en/solar-panels/best-price-tariffs/)
    - [How many solar panels do I need?](https://www.holaluz.com/en/solar-panels/calculate/)
    - Batteries and solar panel surplus 
      
          - [Batteries for solar panels](https://www.holaluz.com/en/solar-panels/batteries/)
          - [Virtual battery](https://www.holaluz.com/en/solar-panels/virtual-battery/)
          - [Self-consumption with surplus rate](https://www.holaluz.com/en/solar-panels/self-consumption-with-surplus-rate/)
    - All about solar panels 
      
          - [Solar panel subsidies](https://www.holaluz.com/en/solar-panels/subsidies-grants/)
          - [Solar panels catalog](https://www.holaluz.com/en/solar-panels/catalog/)
          - [Informative sessions](https://www.holaluz.com/en/solar-panels/webinars/)
          - [Solar panel maintenance](https://www.holaluz.com/en/solar-panels/maintenance/)
          - [Permits for installing solar panels](https://www.holaluz.com/en/solar-panels/permits-regulations-installation-solar-panels/)
- [Electric car charger](https://www.holaluz.com/en/electric-vehicle-charger/)
- Businesses 
  
    - [Electricity tariffs for businesses](https://www.holaluz.com/en/businesses/)
    - [Rate 3.0TD](https://www.holaluz.com/en/businesses/3.0-tariff/)
    - [Rate 6.1TD and higher](https://www.holaluz.com/en/businesses/6.1-tariff/)
- [Producers](https://www.holaluz.com/en/producers/)
- [Blog](https://blog.holaluz.com/?hsLang=en)
- [Frequently Asked Questions](https://www.holaluz.com/en/questions/)

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- [Electricity tariffs](https://www.holaluz.com/en/electricity/electricity-tariffs/)
- [Gas rates](https://www.holaluz.com/en/gas-rates/)
- [Solar panels](https://www.holaluz.com/en/solar-panels)
- [Businesses](https://www.holaluz.com/en/businesses/)
- [Producers](https://www.holaluz.com/en/producers/)
- [Blog](https://blog.holaluz.com/?hsLang=en)
- [FAQs](https://www.holaluz.com/en/questions/)

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See categories

- [Holaluz](https://blog.holaluz.com/en/tag/holaluz)
- [The basics](https://blog.holaluz.com/en/tag/the-basics)
- [Energy sector](https://blog.holaluz.com/en/tag/energy-sector)
- [Solar panels](https://blog.holaluz.com/en/tag/solar-panels)

# Find all the information about 100% green electricity, solar panels for your home and energy saving here

## [Energy sector How to set up an electricity supply and manage your electricity contract](https://blog.holaluz.com/en/how-to-set-up-electricity-and-manage-your-electricity-contract/)

## [Energy sector Electrical voltage and its units of measurement](https://blog.holaluz.com/en/electrical-voltage)

## [Solar panels Best surplus compensation tariff: how to choose the option that suits you best](https://blog.holaluz.com/en/self-consumption-with-surplus)

## [Energy sector](https://blog.holaluz.com/en/tag/energy-sector)

- ### [How to set up an electricity supply and manage your electricity contract](https://blog.holaluz.com/en/how-to-set-up-electricity-and-manage-your-electricity-contract/)
- ### [Electrical voltage and its units of measurement](https://blog.holaluz.com/en/electrical-voltage)
- ### [How to read a digital electricity meter?](https://blog.holaluz.com/en/how-to-read-your-meter-step-by-step)
- ### [Is a lock-in clause in an electricity contract legal?](https://blog.holaluz.com/en/is-lock-in-period-electricity-contract-legal)
- ### [Changes to electricity VAT in 2024](https://blog.holaluz.com/en/changes-electricity-vat)

## [holaluz](https://blog.holaluz.com/en/tag/holaluz)

- ### [How to interpret your electricity bill](https://blog.holaluz.com/en/interpret-your-electricity-bill)
- ### [Holaluz: your support channels and what happens after signing up](https://blog.holaluz.com/en/new-customer-support-channels)

## [Solar panels](https://blog.holaluz.com/en/tag/solar-panels)

- ### [Best surplus compensation tariff: how to choose the option that suits you best](https://blog.holaluz.com/en/self-consumption-with-surplus)
- ### [Best solar panels for home: how to choose the most efficient and cost-effective panel](https://blog.holaluz.com/en/best-solar-panels-for-home)
- ### [How to choose the best solar panel company for your home](https://blog.holaluz.com/en/how-to-choose-the-best-solar-panels-company-for-your-home)

## [The basics](https://blog.holaluz.com/en/tag/the-basics)

- ### [What are watts?](https://blog.holaluz.com/en/what-is-a-watt)
- ### [What is electrical voltage and how to measure it?](https://blog.holaluz.com/en/what-is-voltage)
- ### [6 tips on what to do during a power outage](https://blog.holaluz.com/en/6-tips-on-what-to-do-during-a-power-outage)
- ### [How to reset a digital electricity meter after a power outage](https://blog.holaluz.com/en/how-to-reset-an-electricity-meter-if-the-power-goes-out)

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- [Contact](https://www.holaluz.com/en/contact/)

Most-read

- [Renewable energy: the solution](https://www.holaluz.com/en/green-energy/)
- [Save by personalising your power](https://www.holaluz.com/en/electricity/calculate-power/)
- [installation of solar panels](https://www.holaluz.com/en/solar-panels/)

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