Expandable 1-5 kWh capacity with DELTA 3 Extra Battery, DELTA Pro 3 Extra Battery, DELTA 2 Extra Battery, or DELTA 2 Max Extra Battery. Features 1800W AC output, with 2400W (3600W surge) using X-Boost technology. It offers 5 fast recharging methods: AC, Solar, 800W Alternator Charger, Smart Generator 3000 (Dual Fuel), and Multi-charging. Comes with a 5-year warranty. This compact & lightweight portable power station boasts a super-fast charging speed and supports 99% of household devices, including refrigerators, TVs, and computers. It is perfect for home usage, RV, and outdoor adventures, ensuring you're never left in the dark. The unit is built to last for 10 years, operates almost silently under 600W (30 dB), includes storm warning mode and UPS power outage reminders for swift backup power activation, and offers zero-downtime assurance with a UPS switchover time under 10 ms. Flexible expansion options allow for ultra-long runtime.