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Solar proposal

A solar proposal should show more than a price.

Below is an illustrative proposal for a fictional home, Property 01. It shows the structure a homeowner should expect: the property, the roof, the household, the products, the estimate — and every assumption behind it.

Request a solar proposal Open Property 01
  1. Home
  2. Roof
  3. Usage
  4. System
  5. Proposal
  6. Decision
  7. Project path

Illustrative solar proposal

Example data only

ILLUSTRATIVE SOLAR PROPOSAL — EXAMPLE DATA ONLY

01 Solar proposal · Structure

Property 01

A fictional home with no address. The values describe what each section should contain; they are not figures for any real property, product or installation.

01 Property

Example

The property

What the home is, recorded before anything is proposed.

Property 01 — illustrative elevation A generic two-storey house elevation with a pitched roof. A dashed outline marks where a proposed array could be shown on a roof plan. Dimension lines indicate where measurements would appear in a real proposal; no measurements are given because this is an example only. WIDTH · AT ASSESSMENT HEIGHT · AT ASSESSMENT PROPOSED ARRAY N
Property
Property 01 — no address (example)
Type
Two-storey house (example)
Construction
Masonry walls, pitched roof (example)
Notes
Any constraints relevant to equipment location

02 Roof

Example

The roof

Each plane described, with what is known and what still needs confirming.

Illustrative roof view — not a technical survey A drawing of a pitched roof plane facing the viewer. A dashed boundary marks an indicative usable area inside the roof edges. A chimney casts a shadow across part of the plane and a nearby tree shades the left edge, so modules are drawn only where the plane is clear. A compass shows orientation, a side elevation shows pitch, and a rooflight marks a roof feature. Final suitability depends on technical assessment. N S PITCH
Planes
Planes considered, and why
Orientation
Direction of each plane used
Pitch
Recorded or to be confirmed
Shading
Sources and how they were treated
Condition
Subject to technical confirmation

03 Usage

Example

Household electricity use

The household’s electricity pattern the system was considered against.

Annual use
From bills or supplier data where available
Occupancy
Daytime pattern described by the homeowner
Large loads
Noted where relevant
Changes
Expected changes the homeowner mentioned

04 System

Example

Proposed system

The overall configuration, and the reasoning for it.

Array
Number of modules and layout on a roof plan
Rating
System rating stated (kWp)
Reasoning
Why this configuration suits this home

05 Modules

Example

Modules

The modules named — not described only as “premium”.

Product
Manufacturer and model named
Rated output
Per module, from the datasheet
Appearance
Frame and backsheet colour
Warranty
Product-specific

06 Inverter

Example

Inverter

The inverter named, matched to the modules, with its location.

Product
Manufacturer and model named
Capacity
Matched to the array
Location
Proposed, subject to confirmation
Monitoring
What is included, if anything

07 Generation

Example

Generation estimate

An estimate, with its method — never a promise of weather.

Illustrative seasonal pattern of solar generation, January to December A circular year divided into twelve months. Segments are shortest in December and January and longest around June, showing that UK solar generation is typically lower in winter and higher in summer. The drawing is qualitative, has no values, and is not a forecast for any individual home. JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ESTIMATE ONE YEAR
Annual estimate
Stated as an estimate (kWh)
Method
Calculation method named
Seasonality
Monthly pattern, illustrative

08 Assumptions

Example

Assumptions

Every input that shaped the estimate and any financial figures, listed in full.

Losses
System loss assumptions
Shading
Shading factors applied
Self-consumption
Share of generation assumed used at home
Tariffs
Import and any export rates used
Future prices
Any assumption stated, or none made

09 Energy flow

Example

Potential energy flow

How generation might divide between the home and the grid — illustrated, not promised.

What happens to electricity the home doesn’t use Sunlight reaches the solar roof. The generated electricity first serves the home’s current demand, which is self-consumption. When generation is greater than demand, surplus can be exported to the grid where a suitable export arrangement and metering are in place. When generation is lower than demand, for example in the evening, the home imports electricity from the grid. GENERATION HOME USE · SELF-CONSUMPTION EXPORT* IMPORT METER GRID
Home use
Estimated self-consumption
Export
Where metering and an arrangement exist
Import
What is still drawn from the grid

10 Terms

Price, warranties and installation

Price

Quotation-specific

A written quotation for this project, with what is and is not included.

Warranties

Product-specific

Which warranties apply, who provides them and what they cover.

Installation

Project-specific

Arrangements and credentials confirmed for the individual installation.

02 Customer clarity

Understand what you’re buying before you buy it.

Nine things a homeowner should be able to see clearly before making a decision about solar — from Warmbrick or from anyone else.
No. Item What you should be able to see
01 Product Which modules, inverter and mounting are proposed — named, not described as “premium”.
02 Specification How many modules, the layout on the roof, and how the parts fit together.
03 Assumption Every input behind an estimate: usage, orientation, shading, losses, tariffs.
04 Estimate Generation and any financial figures, labelled as estimates, with the method stated.
05 Price A written quotation for this project, with what is and is not included.
06 Warranty Which warranties apply, who provides them, and what they cover.
07 Installation arrangement Who installs the system, when, and what credentials they hold.
08 Eligibility / export requirement What is needed for any export arrangement, and what is not guaranteed.
09 Next step What happens if you say yes, what happens if you wait, and what you are committing to.

Questions

Proposal questions

Is Property 01 a real home?

No. Property 01 is fictional and has no address. Everything on this page is an illustrative structure — example data only — showing what a proposal should contain.

Why doesn’t the example show prices or savings?

Because prices are quotation-specific and financial outcomes are project-specific. Potential financial outcomes depend on the property, system, electricity use, tariffs, export arrangements and other assumptions.

How should I compare two proposals?

Line them up section by section: the products named, the generation estimate and its method, the assumptions, the price and what it includes, the warranties, and the installation arrangements. Differences in assumptions often explain differences in figures.

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