What Is Battery Arbitrage?
Quick answer
Battery arbitrage is a simple idea: charge your battery when electricity is cheaper and use the stored energy when it is more expensive. This plain-English guide explains how it works, what you need and the risks to be aware of. We install through MCS-certified partners across Scotland.
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Battery arbitrage is a simple idea: charge your battery when electricity is cheaper and use the stored energy when it is more expensive. This plain-English guide explains how it works, what you need and the risks to be aware of.
The basic idea
Many electricity tariffs now charge different prices at different times. Overnight prices are often lower, while late afternoon and early evening prices are higher. A battery can fill up in the cheap window and supply your home in the expensive window.
What you need
You need a home battery with a compatible inverter, a smart meter, and a time-of-use tariff. Solar panels are not essential, but they add value in the brighter months.
Risks and limits
Batteries lose a small amount of energy in each charge and discharge. Tariff prices and rules can change. Each cycle counts towards the battery's warranty limit. Arbitrage works best when it is set up thoughtfully rather than run to the maximum every day.
Tariff rates change, so check the current options before switching.
Batteries and tariffs in a Scottish home
Scottish solar output is strongly seasonal: long bright days in May and June, and very short days in December. That makes a battery useful all year round. In summer it stores the afternoon surplus for the evening, and in winter it can charge on a cheaper overnight time-of-use rate so the home avoids peak-time import.
Where the battery goes matters in Scotland. Unheated garages, sheds and outbuildings in Aberdeenshire, the Highlands or the Borders can fall below freezing, so the chosen battery must cope with that temperature range or be placed indoors in a utility room, cupboard or heated garage. Your installer also confirms the connection with the local network operator, SP Energy Networks in central and southern Scotland or SSEN in the north and islands, and sets up the inverter schedule for the tariff you choose.
How our survey works
Every project starts with a no-obligation survey. We look at your roof orientation, pitch, shading and condition, your fuse board and meter position, where a battery or inverter could go, and how your household uses electricity through the day and across the Scottish seasons. You then receive a written quote showing the equipment, the expected generation for your roof and the full price, so you can compare it fairly. We handle the network connection paperwork with your local distribution network operator, which is SP Energy Networks in central and southern Scotland and SSEN in the north, Highlands and islands. We install through MCS-certified partners. Solar panels and batteries are 0% VAT until March 2027. Finance available, subject to status.
Frequently asked questions
Is arbitrage the same as selling to the grid?
Not exactly. Arbitrage usually means shifting your own use; some tariffs also pay for battery exports.
Does it work in Scotland?
Yes. It is especially useful in winter when solar output is low.
Can I automate it?
Most inverter apps let you schedule charging.
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Get your solar and battery quote
Tell us about your home and we will arrange a survey and a written, no-obligation quote. Finance available, subject to status.