Combine two Lithium 1800 units into one higher-capacity system with the Nature's Generator Lithium 1800 Link Cable. It's the key accessory for boosting your output up to 3600W and doubling your battery capacity when a single unit isn't enough. Built with durable connectors matched specifically to the Lithium 1800 line, it installs in seconds with no tools required. For anyone planning to scale their Lithium 1800 setup down the road, this cable is the simple way to make two units work as one.