• Double Your Power: Connect two Lithium 1800 units to combine their battery capacity and boost output to 3,600 W at 120V 30A, ideal for supporting more devices and higher-demand applications. • Seamless Dual-Unit Integration: Ensures a secure, reliable connection between units for uninterrupted energy flow. • Quick, Plug-and-Play Setup: Fast, hassle-free installation allows for easy system expansion. • Durable & Reliable Design: Made with high-quality materials for safe, long-term performance in both everyday use and backup scenarios. • Installation Made Easy: Learn how to install with our step-by-step video guide.