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| Peak watt
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A unit used to rate the performance of a solar photovoltaic (PV) cells, modules, or arrays; the maximum nominal output of a PV device, in Watts (Wp) under standardized test conditions, usually 1000 Watts per square meter of sunlight with other conditions, such as temperature specified. |
| Peak wind speed
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The maximum instantaneous wind speed (or velocity) that occurs within a specific period of time or interval. |
| Peaking capacity
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Power generation equipment or system capacity to meet peak power demands. |
| Peaking hydropower
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A hydropower plant that is operated at maximum allowable capacity for part of the day and is either shut down for the remainder of the time or operated at minimal capacity level. |
| Peat moss
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The partially decomposed remains of various mosses. This is a good, water retentive addition to the soil, but tends to add the acidity of the soil pH. Valuable for its pronounced air- and water-holding capacity and its freedom from weeds and disease organisms. |
| Pebble texture
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Small drops of compounds are sprayed on drywall and flattened with a trowel or lefts as is. |
| Pebble tray
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Grouping potted plants within a shallow, pebble filled tray in order to maintain humidity in an environment with central heating. Water is poured into the pebbles and evaporates up and around the plants. |
| Pedestal
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(1) The bottom support of a vase, lamp, column, table, etc. (2) Vertical column. |
| Pedestal floor
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Removable floor panels, which are held on pedestals, so that a space is available for cable or ducts to be installed beneath. |
| Pedestal floor, gridless
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Floor with removable panels with pedestal support for the panels at the four corners with no grid supports between panel edges. |
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