---
title: What is Off-Grid and On-Grid Solar Energy?
description: An off-grid solar energy system is not connected to the utility grid, whereas an on-grid (aka grid-tied) solar energy system is connected to the utility grid. Your choice of an off-grid system or on-g
---

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1. [Knowledge Base](https://knowledge.olympuspower.co.uk/?hsLang=en)
2. [OFF GRID](https://knowledge.olympuspower.co.uk/off-grid?hsLang=en)

# What is Off-Grid and On-Grid Solar Energy?

An off-grid solar energy system is not connected to the utility grid, whereas an on-grid (aka grid-tied) solar energy system is connected to the utility grid. Your choice of an off-grid system or on-grid system will determine your access to electricity, what equipment is needed for excess production, what happens when the grid goes down, and how you’re billed for electricity. 

- [GENERAL](https://knowledge.olympuspower.co.uk/general?hsLang=en)
- [SOLAR](https://knowledge.olympuspower.co.uk/solar?hsLang=en#main-content)

    - [ROOFTOP SOLAR](https://knowledge.olympuspower.co.uk/solar?hsLang=en#rooftop-solar)
    - [GROUND MOUNT SOLAR](https://knowledge.olympuspower.co.uk/solar?hsLang=en#ground-mount-solar)
    - [LANDLORD AND TENANT PROPERTIES](https://knowledge.olympuspower.co.uk/solar?hsLang=en#landlord-and-tenant-properties)
- [VOLTAGE REDUCTION](https://knowledge.olympuspower.co.uk/voltage-reduction?hsLang=en)
- [CHP](https://knowledge.olympuspower.co.uk/chp?hsLang=en)
- [OFF GRID](https://knowledge.olympuspower.co.uk/off-grid?hsLang=en)
- [EV CHARGING](https://knowledge.olympuspower.co.uk/ev-charging?hsLang=en)
- [BATTERY STORAGE](https://knowledge.olympuspower.co.uk/battery-storage?hsLang=en)
- [PPA](https://knowledge.olympuspower.co.uk/ppa?hsLang=en#main-content)

    - [SLEEVED PPA](https://knowledge.olympuspower.co.uk/ppa?hsLang=en#sleeved-ppa)
    - [VIRTUAL PPA](https://knowledge.olympuspower.co.uk/ppa?hsLang=en#virtual-ppa)
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