Allows to replace (upgrade) this vehicle. A requested replacement will be scheduled for assembly in a nearby vehicle depot. Once the replacement is built, the vehicle will head to the depot to be scrapped and replaced. In the meantime, the vehicle will operate as usual.
When enabled, power generated here can also be used by consumers that are set to consume surplus power only. Surplus mode is useful for generators for which any unused power goes to waste (e.g. solar panels) and can be instead provided to surplus consumers. Surplus generators always have a priority over non-surplus ones to generate power.
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