The Mango Power Home Backup Battery delivers all the power that you need. It can pump out a massive amount of power with a 4000W AC & 350W DC output, or up to 6600W in a surge. That means that you can power your largest appliance and devices for longer including your fridge during an outage or your welder during an afternoon project! You’ll get the most power and keep your family protected for days during a power outage.