- Radha Energy Cell
- Raising funds through grants and donations
- Raquel Redshirt
- Rasheeda Abdulkareem
- Ravindra Pardeshi
- Ray Grill
- Re-newcy
- Recipes
- Recipes: Beyond Rice
- Recycled Cardboard Parabolic Cooker
- Red Iberoamericana de Cocción Solar de Alimentos
- Red Iberoamericana de Cocinas Solares
- Red Mujeres en Energía Renovable y Eficiencia Energética
- Redsun Solar Industries
- Reflective Open Box
- Reflective material
- Refugee camps
- Regula Ochsner
- Reinhard Erös
- Remote Solar Cooking System
- Renewable Energy Development Center
- Renewable and Appropriate Energy Laboratory
- René Bijloo
- Republic of Congo
- Rescue Mission Gambia
- Research topics
- Reunion
- Reyel and Michaela Daystar
- Rice
- Richard Pocock
- Richard Wareham
- Ripple mirror
- Rita Riewerts
- Robert Chiron
- Robert Metcalf
- Robert Nepper
- Roberto Román
- Robinson Cooker
- Rocket Stove
- Rocks
- Rodrigo Carpio
- Roger Bernard
- Roger Haines
- Rohitas Electronics
- Rolf Behringer
- Rollens
- Rollins Standard Deluxe Cooker
- Romaschka Cooker
- Ron Mutebi
- Rotary Club of Adana-Seyhan
- Rotary Club of Fresno
- Rotary Club of Gulu
- Rotary Club of Los Altos (California)
- Rotary Club of Naperville
- Rotary Club of Tapachula Centenario
- Rotary District 6450
- Rotary International
- Royal Botanic Garden of Jordan
- Ruddy Viscarra
- Rudra Hot Box Community 24/32
- Rudra SK-14
- Rudra SK-23
- Rudra Solar Cooker 2010
- Rudra Solar Energy
- Rwanda
- S.T.E.V.E.N. Foundation
- SAF-WAT
- SCI Digest
- SCI Regional Convention - North America 2015
- SCInet Solar Cooking Convention 2014
- SCInet Solar Cooking Festival 2014
- SCI’s Kenya Program: Sunny Solutions and Beyond
- SELCO Foundation
- SK1.4
- SK12
- SK14
- SLiCK
- SLiCK SM70
- SOCO Burundi
- SODIS
Community content is available under CC-BY-SA unless otherwise noted.