Turns the battery’s low-voltage DC into household AC (120/230 V) to run mains appliances. A combined inverter/charger can also charge from shore power.
Your batteries store low-voltage DC; your kettle, laptop charger and power tools want mains AC. The inverter bridges that gap — and it is usually the single biggest load in the system.
It draws from the battery or load busbar on the DC side and feeds an AC panel on the output side. A combined inverter/charger can also charge from shore power.
Design your van, boat, cabin or RV system in Wattonomy and it sizes the inverter to your AC loads, sizes the heavy DC cable and fuse that feed it, and adds an AC panel on the output — from the appliances you actually run, sized to the recognized standard for your region. You see it on the wiring diagram, in the sized parts list, and in a plain-English build pack that explains the reasoning behind every choice. No account, no email — about a minute to a complete, validated design.
Enough continuous watts to run your largest AC loads at once, with headroom for surge. Wattonomy sizes it from the appliances you actually run.
Because at 12V even a modest 2000W inverter pulls nearly 200A. That current needs heavy, correctly-fused cable — which Wattonomy sizes for your run length.
It takes about a minute. No account, no email.