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Company No. 07377850 · Incorporated 16 Sep 2010

Guardian Solar Ltd

Registered name: GUARDIAN SOLAR LTD

Part of Octopus Energy Topco Limited group

Guardian Solar Ltd made £357k revenue and £137k profit in the year to 31 Dec 2025.

Guardian Solar Ltd’s revenue grew 25% to £357k in the year to 31 Dec 2025, with £137k profit and 3 employees. The company is classified under “production of electricity” and is based in London; we hold 4 years of its filed accounts.

Full P&L filedSection D · Electricity, gas, steam and air conditioning supplySIC 35110Production of electricity
Status
Active
Location
London, London
Age
16 yrs · since 2010
Type
Private Limited Company

Part of a group. The filing indicates this company sits within a group structure, so its results may depend on intra-group trading and it may be hard to replicate independently.

Latest accounts · year to 31 Dec 2025

Key figures

Small teamOperating leverage
Revenue
£357k
Growth ▲24.9%
Profit
£137k
Growth ▲67.3%
Profit margin
38.4%
Gross 54.8%
Employees
3
Change 0%
Profit / employee
£45.7k
Revenue/employee £119k
Profitable streak
4yrs
Consecutive profitable years in our data

Badges are automated estimates derived from the filed figures — not statements of fact about the company.

4 filed years

Financial history

Multi-year financials, oldest to newest
Year to31 Dec 202231 Dec 202331 Dec 202431 Dec 2025
DisclosureFull P&LFull P&LFull P&LFull P&L
Profit & loss
Revenue (turnover)£281k£300k£286k£357k
Cost of sales£147k£147k£146k£162k
Gross profit£134k£153k£140k£196k
Operating profit£120k£131k£109k£183k
Profit before tax£120k£131k£109k£183k
Profit after tax£89.9k£98.4k£82k£137k
Profit (best available)£89.9k£98.4k£82k£137k
Employees (average)4433
Ratios
Profit margin32%32.8%28.6%38.4%
Gross margin47.7%50.9%49%54.8%
Revenue per employee£70.2k£75k£95.4k£119k
Profit per employee£22.5k£24.6k£27.3k£45.7k
Growth (year on year)
Revenue growth—▲6.8%▼4.6%▲24.9%
Profit growth—▲9.4%▼16.7%▲67.3%
Headcount growth—0%▼25%0%
Balance sheet — indirect signals, not revenue
Cash at bank—£99.9k£102k£110k
Net assets£1.9m£2m£2.1m£2.2m
Fixed assets£1.3m£1.2m£1.1m£997k
Current assets£640k£895k£1.1m£1.4m
Debtors£640k£553£793£1.3m
Deferred income—£13k£12.3k£16.2k
SourceFullAccounts · bulk data Sep 2024FullAccounts · bulk data Sep 2024FullAccounts · bulk data Oct 2025FullAccounts · bulk data Aug 2026
Derived from the latest filing

How the business works

Profit margin
38.4%
Profit ÷ revenue.
Gross margin
54.8%
Gross profit ÷ revenue. High for software and services.
Revenue per employee
£119k
Revenue ÷ average employees.
Profit per employee
£45.7k
Profit ÷ average employees.
Cash conversion
—
Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue
278.9%
Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue
4.5%
Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue
362.2%
Money owed by customers. Low = customers pay quickly.
Indirect — not revenue

Balance-sheet signals

Year-on-year changes in filed balance-sheet items. They can hint at momentum (or investment) but are not revenue or profit and must not be read as such.

Net assets
▲7%
Now £2.2m
Cash at bank
▲8%
Now £110k
Headcount
0%
Now 3
Deferred income
▲31%
Now £16.2k
Fixed assets
▼9%
Now £997k

Deferred income is reported together with accruals in this filing (“accruals and deferred income”), so it is an approximate signal only.

Corporate ownership

Group structure

Ownership chain

  1. Octopus Energy Topco Limitedultimate parent75–100%
  2. Octopus Energy Group Limited75–100%
  3. Octopus Energy Generation Limited75–100%
  4. Octopus Energy Generation Fund Management Holdings Limited75–100%
  5. Octopus Renewables Limited75–100%
  6. Reip IV Holdings Limited75–100%
  7. Reip IV Midco Limited50–75%
  8. Sunstone Bidco Limited75–100%
  9. Sunlight Technology Limited75–100%
  10. Guardian Solar Ltdthis company

Bands show the share of ownership each company holds in the one below it.

Sister companies (6)

From the Persons with Significant Control register (corporate controllers only).

Same industry, similar size

Similar profitable businesses

Industry benchmarks →

Sources

Companies House profile Filing history & original accounts

Latest figures from FullAccounts for the year to 31 Dec 2025 (profit £137k), from the Companies House accounts bulk data published Aug 2026. Spotted an error? Request a correction.

Contains public sector information from Companies House licensed under the Open Government Licence v3.0. Data from Companies House, © Crown copyright. View the licence.