Nettotehon

Nettotehon is the electrical power that a generation asset or system can deliver to a load or the electrical grid after accounting for internal losses and auxiliary consumption. It serves as a practical measure of usable output, distinguishing the amount available to consumers from the raw or gross generation produced by the primary energy conversion.

In practice, nettoteho is the gross electrical output minus losses within the plant. This includes power used by station services such as pumps, fans, and control equipment (auxiliary power), as well as losses in transformers, converters, and short transmission paths inside the facility. When discussing the power that reaches the grid or a local network, additional transmission and distribution losses may be subtracted to obtain the net delivered power. Different industries and regions may emphasize nettoteho for performance ratings, contractual guarantees, or financial calculations.

In renewable energy installations, nettoteho describes the power that is actually exported to the grid or supplied to loads after inverter or converter losses, transformer losses, and any derating, shading, or curtailment effects. It is a key figure in performance reporting for wind farms, solar parks, and hydro plants, and is often used alongside gross output to present a complete picture of system efficiency.

Calculation basics: P_net = P_gross − P_losses, with P_losses covering auxiliary consumption, conversion losses, transformer losses, and, where relevant, line or feeder losses. Accurate nettoteho figures require careful metering at the appropriate points in the system. See also terms such as gross output, rated output, and plant efficiency.