A home battery stores electricity for later: solar from the afternoon for the evening, or cheap overnight electricity for the morning and evening peaks. For a Wakefield home the useful questions are how much solar there is to store, how big the battery should be, and what the grid rules are. This guide answers each one with local figures. If you want a quote rather than a guide, our battery storage Wakefield page covers installation in WF postcodes.
Home batteries are not the Heath battery farm
Wakefield has heard a lot about battery storage because of the grid-scale battery site near Heath village, approved on appeal in July 2026 after the council refused it. That is a large commercial installation connected to the national grid. A home battery is a single wall-mounted unit, typically in a garage, utility room or on an outside wall, that only serves the house it is fitted to. The two have nothing in common beyond the word battery.
How much solar a Wakefield roof produces, month by month
The European Commission's PVGIS model gives a 4kW south-facing array on a 35 degree Wakefield roof about 3,826kWh a year. The monthly pattern matters more than the total for a battery, because the battery only helps when the panels make more than the house is using at the time.
| Month | Solar output, 4kW south roof (kWh) |
|---|---|
| January | 132 |
| February | 205 |
| March | 335 |
| April | 431 |
| May | 479 |
| June | 447 |
| July | 472 |
| August | 433 |
| September | 353 |
| October | 245 |
| November | 167 |
| December | 127 |
| Year | 3,826 |
From March to October a 4kW array regularly produces more in the middle of the day than a household uses, and that surplus is what a battery captures. In December and January the panels make around 130kWh a month and most of it is used as it is generated, so a battery does little from solar in deep winter.
Sizing a battery to your evening use
The most common mistake is sizing the battery to the solar array. Size it to what the house uses between the end of the solar day and the next morning: cooking, lighting, television, washing and, for some homes, the electric car. A battery much larger than that evening load spends most of the year part-empty and adds cost without adding savings. Our guide to what size battery storage you need works through the calculation with a year of meter readings.
Charging overnight on an off-peak tariff
A battery does not have to rely on solar alone. On a time-of-use tariff it can charge at the cheaper overnight rate and run the house through the evening peak, which keeps it earning through the winter months when solar surplus is small. Which tariff suits depends on how much solar you have and when you use power; our comparison of the best tariffs for solar and battery sets out the options. Batteries in cold weather also behave differently, which is covered in our guide to battery performance in cold weather.
Adding a battery to existing panels
Many Wakefield homes already have panels and want to keep more of what they make. A battery can usually be added to an existing system, either alongside the current inverter or with a hybrid inverter that replaces it. The survey checks the existing inverter, where the battery can safely go, and whether the combined system stays inside the G98 limit or needs a G99 application. If the panels are not on the roof yet, our solar panels Wakefield page covers that side first.
VAT on home batteries
Batteries installed in homes carry 0% VAT until 31 March 2027. The zero rate covers batteries fitted with new panels, batteries retrofitted to an existing solar system and standalone batteries fitted without solar.
Grid rules: G98 and G99
Every battery connection is reported to Northern Powergrid, the local network operator. A system up to 16A per phase, 3.68kW on a single-phase supply, is notified under G98 within 28 days of connection. Anything larger, including a battery that takes the combined export capacity of solar plus storage over that limit, needs a G99 application and approval before it is connected. The inverter must be listed on the ENA type-test register.
Charging an electric car alongside a battery
If you also drive an electric car, set the charger and battery up together so the battery is not emptied into the car in the evening. Our EV charger installation Wakefield page covers home charging in the district.
Frequently asked questions
Is a home battery worth it without solar panels?
It can be, if you are on a time-of-use tariff and charge overnight to cover the evening peak. Without panels the battery depends entirely on the gap between the off-peak and peak rates.
Where does a battery go in a Wakefield home?
Usually in a garage, utility room or on an outside wall, depending on the unit's rating and the space available. The survey confirms a safe location.
Do I need permission to add a battery?
Not planning permission in most cases, but the connection must be notified to Northern Powergrid under G98, or approved first under G99 if the system exceeds 16A per phase.