A tendency to suffer allergies is often hereditary. The most common causes of hay fever are: tree pollen such as elder, elm, hazel and especially birch (spring hay fever) grass pollen (summer hay fever) mugwort and hybrids such as chrysanthemum (autumn hay fever)
A power inverter, or inverter, is an electronic device or circuitry that changes direct current (DC) to alternating current (AC).The input voltage, output voltage and frequency, and overall power handling depend on the design of the specific device or circuitry.he AC output voltage of a power inverter device is often the same as the standard power line voltage, such as household 120 VAC or 240 VAC. This allows the inverter to power numerous types of equipment designed to operate off the standard line power.
Inverter Efficiency is a measure of how well the grid connected inverter converts the power it receives from the solar panels into power available to your home or to the grid. Most grid connected transformer based inverters have an efficiency of around 93% or better, transformerless are typically around 95% or better. final word of caution: Be aware that inverters are rated in DC input and AC output terms. Make sure your inverter is also rated to suit the output of your panels in DC! (The previous link explains how to check this). Some retailers will offer you a larger inverter so you can add extra solar panels at a later date.