If you experience intermittent, brief blackouts, our 4 kWh Haven Home Backup System is an excellent first option. It’s perfect for shorter outages where you need to plug in your fridge, laptop, and WiFi router. This kit includes a Yeti PRO 4000, delivering about 4,000 Watt Hours of backup for your apartment or smaller home. If you’re no stranger to blackouts, our 8 kWh or 12 kWh Haven Home Backup Systems might be a better option. Both systems keep up to ten essential circuits running in your home and feature the Yeti PRO 4000, plus the easy-to-use transfer switch the Haven 10. The main difference is that the 8 kWh system features the Tank PRO 4000 expansion battery and the 12 kWh system features two Tank PRO 4000 expansion batteries giving you an additional 8000 Watt Hours of battery capacity. Our 16 kWh and 20 kWh Haven Home Backup Systems are for power-hungry homes that need to last multiple days without power. They deliver 16,000Wh and 20,000Wh of power combined with the Yeti PRO 4000, respectively, which is enough to keep your critical circuits running for days with no recharge. Both kits include a Haven 10 Home Integration Kit transfer switch and multiple Tank PRO 4000 Expansion Batteries.