My Joule Box Ltd Issue 1: 8.0% Bond
Investment in the bond offer will help around 1,500 people access clean power in rural DRC
- Raised
- £434,900
- Investors
- 259
- Days to run
- 35
Green Mini Grid Expansion in Dungu, Democratic Republic of Congo
Investments in this raise will support the expansion of an existing solar mini-grid in Dungu, bringing clean, reliable electricity to more homes, businesses, and essential services. This will improve everyday life, support local jobs and livelihoods, and reduce reliance on polluting fuels—delivering clear benefits for both people and the environment.
Energy Access
Connect 300 small businesses to the existing Green Mini Grid
10,944 tonnes
of CO2 saved over the lifetime of the GMGs
242 MWh
Of clean, solar energy generated each year
900 Homes
Provided with reliable electricity, both during the day and at night
About My Joule Box
- Directors name(s): Paul Berthomieu, COO
- Directors name(s): Charlotte Cadoret, CFO
- Location: Dungu, Democratic Republic of Congo
- Sector: Green Mini Grids.
- Founded: 2023 (Parent company founded in 2016)
- Les Soleils du Garamba is a green mini-grid project in Dungu, Democratic Republic of the Congo, delivering clean, reliable electricity to homes and businesses while helping protect the surrounding environment.
- In 2024, My Joule Box acquired a 75% majority stake in Les Soleils de Garamba Limited (LSG), making it a subsidiary, with the remaining 25% held by original developer GDS International—ensuring strong continuity and deep project expertise.
- MyJouleBox is a French-based pan-African startup that develops innovative hardware and software to optimise solar energy systems.
- The company operates in several African nations, including Benin, Burkina Faso, Niger, Togo, Senegal, and the DRC.
What the project investment will enable
Provide power to 300 small businesses, alongside supply of productive use equipment to stimulate local enterprise and job creation.
Install 680 streetlights to improve community safety, reduce crime, and enable a thriving night-time economy.
Strengthen local operational capacity, supporting jobs and ensuring the long-term sustainability of the energy network.
Reduce reliance on polluting fuels by offering renewable energy alternatives, helping to protect the surrounding environment and ease pressure on the nearby conservation area of Garamba National Park.
Support inclusive economic growth by enabling entrepreneurship and improving livelihoods in underserved communities.
Key product info
Issuer: Les Soleils du Garamba (“My Joule Box”)
Issuing Country: Democratic Republic of Congo
Investment target: £435,000
Minimum investment: £50
Maximum investment: No maximum
Maturity: 24 months or on payment of the RBF grant, whichever is sooner.
Expected interest rate: 8% per annum
Withholding tax rate: 15% (applicable to UK residents who do not invest within an IF ISA)
Interest payment frequency: Semi-annually - beginning 6 months after the issue date.
Capital repayment: 24 months or on payment of the RBF grant, whichever is sooner.
Financial Instrument: Promissory Note / Interest Bearing Bond
Security: Secured (see details in the Offer Document)
Meet the My Joule Box team
MyJouleBox is a French solar developer, that has attracted investment from Acumen, EDFI and Triodos. Founded in 2016, is a pan-African solar developer based in France, which develops tools to optimize solar energy systems and facilitate access to electrification in the most remote regions. MJB has become a major player in the African solar market thanks to its innovative solutions. To date, it has made its mark in Benin, Burkina Faso, Niger, the DRC, Togo, and Senegal, with a positive and lasting impact on the daily lives of thousands of our fellow citizens
Paul Berthomieu
Charlotte Cadoret
Pierre Bucaille
Risks
You must read the offer document (provided below) where a statement of risks is presented, particularly in section 8 – Risk Analysis Overview
This page has been approved by Share In Ltd (“ShareIn”) (FRN 603332) on 08/04/2026 as a financial promotion for the purposes of Section 21 of the Financial Services and Markets Act 2000 (as amended). ShareIn’s approval of this page is limited to the communication of it by Lendahand Ethex Ltd (FRN 776908) as an appointed representative of ShareIn.