Solar Installation Cost Breakdown
Understand exactly what you're paying for when you install solar panels. We break down every component so you can compare quotes confidently.
Where Your Money Goes
The panels that convert sunlight into electricity
Converts DC power from panels to AC for your home
Professional installation by qualified electricians
Hardware to securely attach panels to your roof
Wiring, isolators, and connection equipment
Safe access to your roof during installation
Paperwork, DNO notification, and warranties
Component Details
The panels that convert sunlight into electricity
- •Typical: 10-15 panels for a 4kW system
- •Premium panels cost more but offer better efficiency
- •25-30 year performance warranty standard
- •Black panels cost slightly more than blue
Converts DC power from panels to AC for your home
- •String inverters are most common and affordable
- •Microinverters cost more but optimise each panel
- •Hybrid inverters required for battery storage
- •5-12 year warranty typical
Professional installation by qualified electricians
- •Typically 1-2 days for standard installation
- •Includes electrical work and testing
- •MCS certification required for SEG eligibility
- •Workmanship warranty usually 5-10 years
Hardware to securely attach panels to your roof
- •Roof hooks, rails, and clamps
- •Materials vary by roof type (tile, slate, flat)
- •Quality mounting prevents leaks and damage
- •Should last the lifetime of the system
Wiring, isolators, and connection equipment
- •DC and AC cabling
- •Generation meter
- •Isolator switches
- •Consumer unit upgrades if needed
Safe access to your roof during installation
- •Required for most roof installations
- •Cost varies by house size and access
- •Some quotes include, others don't - always check
- •Single storey may not need scaffolding
Paperwork, DNO notification, and warranties
- •MCS certification and registration
- •DNO (grid) notification
- •Building regulations compliance
- •Warranty registration
Cost by System Size
Typical costs for different system sizes (panels only, no battery)
Optional Extras
Additional items that may be quoted separately
Battery Storage
Store excess energy for evening use
EV Charger
Charge your electric vehicle with solar
Bird Proofing
Mesh to prevent nesting under panels
Monitoring System
Advanced app-based monitoring
Roof Repairs
If needed before installation
About Battery Storage
Battery storage typically adds £2,500-£6,000 to the cost depending on capacity (5-10kWh). While it increases upfront cost, it can significantly improve your self-consumption rate from around 40% to 70-80%, making the most of your solar generation.
Price Trends
Good News: Prices Have Fallen
- ↓Solar panel costs have dropped 80% since 2010
- ↓Average system prices fell 15% in 2023
- ↓Battery storage costs continue to decrease
- ↓0% VAT on residential solar until 2027
What Affects Your Price
- Roof type and accessibility
- Panel brand and efficiency rating
- Inverter type (string vs micro)
- Your location (labour costs vary)
Tips for Comparing Quotes
- 1
Check what's included
Ensure scaffolding, all electrical work, and DNO notification are included. Hidden extras can add £500-£1,000.
- 2
Compare like-for-like
Check panel wattage, inverter brand, and warranty lengths. A cheaper quote may use lower quality components.
- 3
Don't just choose the cheapest
Very low quotes may indicate corners being cut. Quality installation matters for 25+ year system life.
- 4
Ask about payment terms
Avoid paying more than 25% upfront. Standard terms are deposit on order, balance on completion.