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Founded in August 2013 as a “transitional micro-housing” pilot project, the self-governed, peer-supported Opportunity Village Eugene is home to 30 otherwise homeless individuals and couples. Each tiny unit—approximately 60 to 80 square feet in size—offers safety and privacy as well as computer and wi-fi access. Kitchens, gathering areas, restrooms, and laundry facilities are placed in communal areas. In place of rent, residents pay a $30 per month utility fee and community service hours.

Related: How Tiny House Villages Could Solve America’s Homeless Epidemic

Operating costs for the entire village average around $1,800 per month, but the inclusion of solar panels has the potential to reduce those bills further. In addition to energy independence, these solar chargers also have the benefit of teaching residents about renewable energy. The durable and lightweight chargers can be easily moved and examined by residents, who can position the panels to their liking. The 14-Watt and 20-Watt SunJack solar chargers weigh in at just 2 pounds and 2.7 pounds, respectively, and come with either one or two 8,000mAh lithium-polymer batteries.

+ SunJack

Images via SunJack