Solar Panel Installers UK design systems based on real usage, not guesswork
When it comes to investing in solar panels, especially with battery storage, one of the most overlooked steps is also the most important: getting the design right from day one.
At Solar Panel Installers UK, we’ve earned our reputation not by installing the most systems, but by installing the right system for each property. That means taking the time to understand your energy profile, not just your postcode.
We Ask More Questions. On Purpose
From business hours and roof layout to tariff rates and projected load growth, our team collects every detail we need to make your system work harder and pay back faster.
We don’t deal in “one size fits all” kits because no two properties or businesses use energy the same way.
That’s why we created our Solar ROI Checklist a detailed pre-design assessment used by our engineers to ensure every system we install is:
– Matched to your actual usage patterns
– Designed with real-time cost-saving logic
– Capable of qualifying for Smart Export Guarantee (SEG)
– Future-ready (EV charging, off-peak battery cycles, etc.)
Why It Matters for ROI
A poorly-sized or under-optimised system will still generate electricity… But it won’t maximise your return.
A properly designed system:
– Replaces the right portion of your grid usage
– Stores excess energy for peak-rate times
– Pays for itself faster than most clients expect often in under 6 years
Detail-Driven Design = Long-Term Results
Whether you’re a homeowner or a business managing rising energy costs, our method is the same: we listen first, we calculate second, and only then do we install.
That’s why Solar Panel Installers UK continues to be trusted across the country not for fast quotes, but for fast ROI, built from accurate data.
commercial Solar ROI Checklist
Key Information Required for ROI Calculation
1. Business Information
Business name and industry type
Operating hours (e.g. Mon–Fri 9am–5pm or 24/7)
Number of employees (can indicate base load demand)
Site address and contact details
2. Electricity Usage Data
Most recent 12 months of electricity bills (ideally all 12, or at least 3–6)
Standing charges and unit rates (day vs night, peak/off-peak)
Meter type (single-phase or three-phase)
MPAN number (Meter Point Administration Number)
Half-hourly data (from the supplier or smart meter, if available)
3. Roof & Site Information
Roof size and type (flat, pitched, material)
Roof orientation (south-facing, east/west, etc.)
Shading issues (trees, buildings, chimneys)
Structural load capacity (or building plans)
Site photographs (roof, electrical room, meter cabinet)
4. Energy Load Profile
Typical usage patterns (e.g. daytime machinery, refrigeration, lighting)
Weekend/holiday usage vs weekday
Future expected changes in energy demand
Are there EV chargers, electric forklifts, or planned expansion?
5. Export/Import Preferences
Is the client open to exporting excess energy?
Do they want to stay off-grid partially or fully?
Does the business qualify for Smart Export Guarantee (SEG)?
6. Financial Considerations
Current cost per kWh and total energy spend per year
Any grant funding or tax relief already used
Desired payback period (3–6 years? Long-term?)
Lease or ownership status of premises (roof access)
7. Battery Storage Questions (if applicable)
Interest in storing excess solar energy?
Overnight vs daytime peak usage needs
Backup power requirements (e.g. for refrigeration or IT systems)
8. Future Intentions
Any plan to electrify fleet or processes?
Any known tariff changes or energy supplier switch planned?
Optional: Customer Preferences
Interest in green credentials / ESG reporting
Warranty duration expectations
Maintenance / monitoring preferences.
Out-of-the-box systems don’t belong on your roof. Our Billericay specialists build around your needs, not ours. https://solarpanelinstallers.co.uk/billericay/
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