Build your complete solar panel kit with battery & inverter
Tell us what you need and get three costed kits from UK stock in under 60 seconds: panels, inverter, optional battery, roof mounting, isolators, DC cable and MCS labels, each checked against MCS design rules.
What do you need?
Refine your kit
Build configuration
Fine-tune your kit for your exact needs
Filters
— matching invertersInverter options
— matches · scroll for moreBattery & storage
Set capacity, choose a specific pack, or add whole-home backup
Add-ons & extras
Optional equipment added to the bill of materials
DC compatibility & compliance
Your configuration is checked against Voc cold, DC/AC ratio and DNO route
How the solar panel kit builder works
Enter your daily electricity use and roof type, and the builder sizes a complete solar PV system around it — panels, inverter, battery storage and every balance-of-system part needed to install it. You get three costed options: Budget for the lowest upfront cost, Balanced for the best long-term value, and Premium for maximum generation and the longest warranties.
Every kit is checked against the same design rules an installer would apply. String voltage is calculated at −10 °C to confirm cold Voc stays inside the inverter's maximum DC input. The DC/AC ratio is validated against the inverter's own limit so the array won't clip. Battery pairing is restricted to combinations the manufacturer actually supports — high-voltage and low-voltage packs are never mixed, and series-specific rules are enforced. The result tells you whether the system falls under G98 notification or needs a full G99 DNO application.
For installers: the same tool works as a solar BOM configurator. Each kit comes out as a complete solar bill of materials, every part with its SKU, quantity and stock, which you can download as a quote PDF or CSV, or add to the basket in one go.
What's included in every kit
- Solar panels — monocrystalline and bifacial double-glass modules from Longi, JA Solar, Aiko and Canadian Solar.
- Inverter — hybrid, string or three-phase from Fox ESS, Solis, SolaX, Sunsynk, GoodWe, Growatt, Huawei, SolarEdge and Sigenergy.
- Battery storage — optional, matched to the inverter's supported voltage and communication protocol.
- Mounting — one manufacturer's complete system for your roof, never mixed brands: Clenergy on tiles, slate and metal sheet, K2 D-Dome on flat roofs and GSE for in-roof.
- Electrical — AC and DC isolators, 4 mm² DC cable, MC4 connectors, generation meter and optional surge protection. The AC cable from the inverter to your consumer unit isn't included (we don't sell general AC cable), and each kit says so; Tesla kits can add a Powerwall Connect cable.
- Compliance — MCS 012 hazard and PV labelling pack.
Common questions
What size solar system do I need?
As a rough guide, a UK array generates around 950 kWh per kWp installed each year. A home using 12 kWh a day (roughly 4,380 kWh a year) typically suits a 4–5 kWp array of about 10 panels. Enter your actual daily usage or monthly bill above and the builder sizes it for you.
For a solar panel kit for home use, that works out as: a 4 kW solar kit for about 10 kWh a day (3,800 kWh a year), a 5 kW solar kit for about 13 kWh a day (4,750 kWh a year), and a 6 kW solar kit for about 16 kWh a day (5,700 kWh a year).
How many solar panels do I need?
Divide your yearly electricity use by 950 to get the array size in kWp, then divide by the panel size. With today’s 430–480 W panels that is about two panels per kWp: a home using 4,380 kWh a year needs about 4.6 kWp, or 10 panels. The builder works it out from your usage or bill and lays the panels out on your roof, so you can see how many fit.
What size solar battery do I need?
This builder works as a solar battery size calculator: it sizes the battery to cover the evening and overnight half of your day, plus 10% headroom. A home using 12 kWh a day gets a battery of about 6.6 kWh; at 20 kWh a day it is about 11 kWh. Enter your usage above and each kit comes with a battery sized for you, which you can change.
Do I need G98 or G99 approval?
Single-phase inverters rated at or below 3.68 kW AC can normally be installed under G98, which is a notification to your DNO after commissioning. Anything above that generally requires a G99 application before installation. The builder tells you which route applies to your configuration.
Which battery works with my inverter?
Not all batteries pair with all inverters. Some manufacturers only permit their own packs, and high-voltage batteries cannot be used with low-voltage inverters. The builder only ever offers batteries the selected inverter actually supports, so an incompatible pairing can't be specified by accident.
Can I install a solar kit myself?
The DC side of a PV installation is notifiable electrical work. Kits can be bought without a trade account, but the grid connection and final commissioning should be completed by a competent electrician, and MCS certification is required if you want to claim the Smart Export Guarantee.
What is the DC/AC ratio and why does it matter?
It's the array's DC capacity divided by the inverter's AC rating. Slight oversizing is normal and improves winter yield, but too much causes clipping, where generation above the inverter's limit is lost. Each inverter's own limit is checked as your kit is built.
A guide, not a final design
The kits, checks and figures from this builder are a guide to help you plan and price a system. They're worked out from the details you enter and standard design rules, not from a survey of your property. Before you buy or install, have a competent, MCS-certified installer confirm the design for your roof, wiring and grid connection. ClearRay Solar gives no warranty that a recommended configuration suits your property and accepts no responsibility for design decisions based only on it. This doesn't affect your statutory rights or the manufacturers' product warranties.