Battery storage is easier to justify on a big factory than on a small unit, and Westhoughton has far more of the second. That does not rule it out. A firm on Wingates Industrial Estate running a 30 or 40 kW array will usually find its roof producing more than it can use at weekends and on bright summer middays, and a modest battery can carry that surplus into the next working morning or the weekday 4pm to 7pm peak. Whether it pays depends on what your tariff charges at those times, which varies much more for smaller businesses than for half-hourly metered sites. Storage up to 50 kW also comes under MCS's battery standard, MIS 3012. We run the numbers both ways and tell you if the panels on their own are the better buy.
We reply within one working day to book a site visit.
The benefits are real but smaller in absolute terms, so each one has to earn its place in the payback sum.
01
A unit closed on Saturday and Sunday exports two days of solar for whatever its supplier offers. Business-focused suppliers do not have to provide the Smart Export Guarantee, so that rate can be low. A battery holds part of the weekend output and releases it when the machines start up again.
02
SP Electricity North West's weekday red band runs from 4pm to 7pm all year. Smaller sites on aggregated tariffs see red-band distribution rates many times the amber rate, and a battery discharging in those hours takes the edge off a cost that is easy to miss on a small-business bill.
03
In December a Greater Manchester roof makes around a quarter of its June output per kW. Storage cannot fix that, but a battery charged overnight on a cheaper rate can still cut daytime import in winter, provided your supplier offers a time-of-use tariff worth exploiting.
04
At this scale a battery is usually a wall-mounted or floor-standing cabinet rather than a container. It can often go inside the unit near the main board, which saves on groundworks, as long as the spot meets fire separation and access requirements.
05
Milking equipment, cooling tanks and workshop tools on a farm do not always line up with sunshine. A battery charged from a ground array or barn roof can cover an evening milking, for example, where the farm's routine puts it in the red band.
06
Storage used with on-site renewables is exempt from business rates in England until March 2035, so a battery on a rated Westhoughton unit does not add to the bill. A battery charged only from the grid may not qualify, which is one reason we design around your solar.
£0
Site survey and a review of your half-hourly data
kWh
Systems sized from your own meter readings
G99
Grid application drawn up and submitted for you
M17
Based on Trafford Wharf Road, Trafford Park
Westhoughton's commercial property is mostly modest in scale. Units on Wingates, at Mango Park and around Chequerbent are often occupied by a single owner-managed firm on a single supply, which makes the electrical design simpler than in a multi-tenant mill. It also means there is usually no facilities manager, so the battery has to run unsupervised, report clearly and be easy to isolate. We set the controls conservatively and give you a monitoring view a director can read in a minute.
Out towards Hindley and Over Hulton, farm buildings bring different conditions: dust, livestock, damp and long cable runs between the yard and the field. A battery on a farm needs a dry, ventilated, secure location away from straw and fuel stores, and the inverter has to suit the farm's supply, which may be single-phase. Bolton Council remains the planning authority for any new external enclosure, and there is no permitted development class for battery storage.
A battery only pays with generation to fill it, so start with our page on commercial solar panels in Westhoughton, which covers roof systems, farm arrays and benchmark prices.
"Most of the small Westhoughton firms we're asked to look at are surprised that we sometimes advise leaving the battery out and putting the money into a few more panels instead."
A battery's value rests on the gap between your cheap and expensive rates. We read your bills and supply contract before modelling anything, because a small business on a flat single-rate tariff gets far less from storage than one with peak and off-peak pricing.
We model weekday and weekend use against the array's generation and pick the smallest battery that captures most of the surplus. Oversizing is the usual mistake at this scale, and the proposal shows the extra saving each additional kWh would bring.
Storage counts as generation, so the G99 application to SP Electricity North West includes it, or is updated if you already have panels. We send your insurer the battery location, fire separation and isolation arrangements before the installation date.
Indoors, that means a non-combustible wall or plinth, the right clearances and a cable route to the main board. On a farm or an outside wall it means a weatherproof enclosure, protection from vehicles and livestock, and a lockable isolator.
The battery, its inverter and two-way protection are installed and connected, followed by the meter that lets the controller see your import. On a smaller unit the disruption is limited to a short power-down agreed with you in advance.
We run charge and discharge tests, prove the emergency shutdown and set the control mode, usually self-consumption with a red-band discharge window. After a few weeks of real data we check the battery is cycling the way the model expected.
You get the commissioning certificate, warranty registration, an app login and a one-page sheet for whoever opens up in the morning: what normal looks like, what an alarm means and how to isolate the system safely.
There are two layers of cover on a commercial installation, and it pays to know which is which. The first is the installer's workmanship guarantee. It covers the way the system was put in: the fixings through your roof, the cable runs, the terminations, the protective devices and the commissioning settings. Its length and terms are written into the quotation, so you can read them before you sign rather than discover them afterwards.
The second layer belongs to the manufacturers. Panels normally carry a product warranty and a separate performance warranty, which promises a minimum output after a set number of years. Inverters and batteries have their own terms, often with cycle or throughput limits on storage. These vary by product, so every proposal names the exact models and attaches their warranty documents.
A guarantee is only as good as the install underneath it. That's why the structural check comes before the design is fixed, why every string is tested and recorded to BS 7671, and why the grid connection is commissioned to the settings SP Electricity North West has approved. If something we fitted fails because of how it was fitted, we come back and put it right.
In writing
Workmanship guarantee, set out in your quote
Per model
Manufacturer product and performance warranties
Test results, drawings, warranty certificates and the grid connection agreement are handed over in one pack on the last day.
For a small Westhoughton roof the real comparison is often between spending on a battery and spending on more panels. The table shows how the options differ; your own figures decide between them.
| Comparison point | Solar only | Solar + battery | Battery on its own (tariff shifting) |
|---|---|---|---|
| Solar used on site | Only what the load takes at the time | Higher: surplus stored for later | No solar involved |
| Red-band (16:00-19:00) costs | Little effect, almost none in winter | Cut with stored solar or overnight charge | Cut with overnight green-band charge |
| kVA capacity charges | No reliable effect | Peaks can be shaved | Peaks can be shaved |
| DNO export limit | Surplus above the cap is lost | Surplus stored instead of clipped | Cap applies to battery discharge too |
| Backup in a power cut | None as standard | Only if designed for it | Only if designed for it |
| Planning and permissions | G99; roof usually permitted development | G99; roof PD plus a siting and fire review | G99; no PD class, so take planning advice |
No official per-kWh benchmark exists for commercial storage, so we will not quote one. The price for your site comes down to these.
Some smaller units and farms run on a single-phase supply, which limits inverter choice and battery power. Three-phase units on Wingates have more options. The G98 threshold is 16 A per phase, so even a small battery often needs a G99 application.
Fitting a cabinet indoors beside the main board at a Mango Park or Chequerbent unit is usually the cheaper route. A farm installation, with a weatherproof enclosure, groundworks and a long cable run from a barn, costs more for the same storage.
If your array is already running, a battery may need its own inverter and an updated connection agreement. Retrofitting is common and straightforward, but it costs more than designing storage in from the start.
Manufacturers warrant batteries for a set number of years or cycles, whichever comes first, with a minimum capacity at the end. A battery cycled daily uses that allowance faster, so we compare warranties against how hard your site would work it.
Lithium batteries lose usable capacity in the cold and should not be charged below the manufacturer's minimum temperature. In an unheated barn or store on the edge of Westhoughton we would specify an enclosure with temperature management, or find a frost-free spot closer to the farm office or workshop.
Sometimes. If you work five days a week and export a lot at weekends, or your tariff has a high peak rate, storage can pay. If you run six or seven days and already use nearly all your generation, it rarely does. We model both and show you the difference in pounds.
An external enclosure may. There is no permitted development class for battery storage, so we check with Bolton Council before installing anything outside. A cabinet fitted inside an existing unit is generally less of a planning question, though we still confirm it for each site.
Only if it is designed to. Most grid-tied systems shut down when the grid fails, to protect anyone working on the network. Backup needs extra switchgear to separate your chosen circuits and adds cost, so tell us early if a freezer, alarm or server must stay on.
MCS's MIS 3012 covers battery storage in permanent buildings up to 50 kW maximum output, which takes in the size of battery most smaller units would consider. Larger systems sit outside MCS and are designed to BS 7671 and the IET Code of Practice instead. We tell you which applies to your design.
On 21 December 1910 an explosion at Hulton Colliery's No. 3 Bank Pit, known locally as the Pretoria Pit, killed 344 men and boys. The memorial lists the dead and is a quiet, moving reminder of how much of this area's history was built on coal.
Learn more about Pretoria Pit Disaster Memorial on Google Maps
Ancient broadleaf woodland that follows Borsdane Brook along the Westhoughton and Hindley boundary, designated a local nature reserve in 1986. A footpath runs the length of the valley through oak, ash, birch and hazel.
Learn more about Borsdane Wood Local Nature Reserve on Google Maps
Bolton Wanderers' home ground opened in 1997 at Middlebrook, a few minutes up the A6 and M61 from Westhoughton. Matchdays aside, the club runs stadium tours, and the surrounding retail and leisure park keeps it busy all week.
Learn more about Toughsheet Community Stadium on Google MapsWe're a new name, so you won't find a wall of reviews here yet. We'd rather show you nothing than make some up.
For a project this size, reviews were never the best evidence anyway. Ask any installer you're considering for a reference site you can visit, a year or more of generation data from a system they fitted, and the grid connection paperwork from a past job. If they can't produce those, keep looking.
Send your bills, your tariff details and, if you have one, your current solar output. You will get a straight yes or no on a battery.
