Whether you're leaning toward the quiet efficiency of battery backup or the enduring reliability of generators, this guide will shed light on the pros and cons of each, allowing you to choose the best solution for your unique situation. A typical whole-home battery system costs $24,500 net versus $26,400 for a comparable natural gas. When the power goes out, you have two main options for backup power: a traditional generator or a home battery system. Both will keep your lights on and your refrigerator running, but they work very differently. Historically, most people have relied on propane, diesel, and natural gas-powered. Battery backups, particularly when paired with solar energy, offer a clean, renewable solution that not only provides power during outages but also helps reduce reliance on fossil fuels.