Compare diesel vs propane generators for off-grid solar backup power. Get fuel costs, runtime data, maintenance requirements, and integration tips for optimal system performance. Maintenance &. . When it comes to backup power or off grid energy solutions you might choose between solar power generators and silent diesel generators. Both the options have their own benefits but diesel generators are basically the better choice for reliability performance and cost effectiveness. Understanding the environmental and sustainability impacts of these options throughout their lifecycles can empower individuals and organizations to make informed. . Choosing the right backup generator for your off-grid solar system can make or break your energy independence goals. Energy reliability is critical, especially in areas with unstable grid power, remote locations, and. .