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Lumen Sparse Demo.

Affordable solar energy for off-grid communities across Latin America.

Medellín, Colombialumen.latFounded 2020

About this startup

What we're building

Access to electricity remains one of the biggest barriers to economic mobility in Latin America. Lumen was founded in 2020 by two engineers who grew up in off-grid communities in Colombia's Pacific coast. Our hardware-software stack includes a solar panel, a smart battery controller, and an SMS-based payment system that works without a smartphone. Today we operate in 3 countries — Colombia, Ecuador, and Peru — serving more than 12,000 households. Families use Lumen to power lights, fans, and phone chargers, and our data shows a 60 % increase in study hours among children in homes we serve. Our revenue model is a lease-to-own subscription: customers pay weekly or monthly until the system is paid off, at which point ownership transfers to them. Default rates are under 4 % thanks to remote monitoring and community-ambassador networks.

B2B2CFemale co-founderSocial impactCleantechEnergy

Team

Founders & leadership

SR

Santiago Reyes

Co-founder & CEO

Electrical engineer from Universidad Nacional de Colombia. Grew up in Tumaco without electricity. Previously led rural electrification programs at IPSE.

VO

Valentina Ospina

Co-founder & CTO

Hardware engineer and IoT specialist. Built embedded systems at Siemens before returning to Colombia. Designed Lumen's smart controller from the ground up.

CA

Camilo Arias

Head of Growth

Former VP Sales at Rappi Colombia. Expert in last-mile distribution and community ambassador networks across rural LATAM.

Cap table

Backed by

Product

See it in motion

Smart Solar Controller

Proprietary IoT device monitors battery health, prevents misuse, and enables remote disconnection for non-payment — all without internet.

SMS-First Payments

Customers top up via SMS on any feature phone. No smartphone or bank account required — essential for rural LATAM.

Lease-to-Own Model

Families pay $0.50 – $1.20/day for 18–30 months, then own the system outright. Zero upfront cost eliminates the biggest adoption barrier.

Traction

By the numbers

Households served
12,000++82% YoY
Countries
3
Collection rate
96.2%+1.4pp YoY
CO₂ avoided (t)
4,800+91% YoY
Avg payback period
24 mo
NPS
72+8 YoY

Milestones

The journey so far

  1. 2020

    Founded in Medellín after a field trip to the Pacific coast revealed 2.3M off-grid households in Colombia alone.

  2. 2021

    Deployed first 200 systems in Chocó department. Raised $400K pre-seed from Rockefeller Foundation and local angels.

  3. 2022

    Launched in Ecuador. Crossed 1,000 active households. Won MIT Climate Grand Challenges regional prize.

  4. 2023

    Closed $1.7M seed round. Expanded to Peru. Reached 6,500 households and zero plastic waste in installations.

  5. 2024

    Surpassed 12,000 households. Launched Lumen Pay — a mobile wallet for rural energy credits. Default rate down to 3.8 %.

  6. 2025

    Opening $3M Series A to scale into Bolivia and Guatemala and add agricultural pumping to product line.

Press

In the news

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