Wiring components end-to-end so their voltages add (e.g. two 12 V panels in series make 24 V). Current stays the same.
Wiring components in series adds their voltages — the trick behind 24V and 48V systems and higher-voltage solar strings that run on thinner, cheaper cable.
Two 12V panels in series make 24V at the same current. Batteries and panels are both wired this way to raise system or array voltage.
Design your van, boat, cabin or RV system in Wattonomy and it chooses series or parallel arrangements to hit your system and array voltage, and shows the wiring — 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.
It adds the voltages of the components while the current stays the same — so two 12V sources in series give 24V.
Series raises voltage (good for MPPTs and long runs); parallel raises current. Most arrays use series, or a mix; Wattonomy picks what suits your controller.
It takes about a minute. No account, no email.