Hello Howard, the combined wattage is W and you have a V charge controller. I want to combine 2 solar panel. Hello there, you can tally up the wattages and calculate amps from there since you know the voltage. You will need at least 18 amp battery, 20 amp would be the safe option. Save my name, email, and website in this browser for the next time I comment. Insert Watts W :. Insert Amps A :. With 8.
Refer to the image below to visualize how voltage and electric current works Current I is a rate of flow and is measured in amps A. Ohms R is a measure of resistance and is analogous to the water pipe size. Current is proportional to the diameter of the pipe or the amount of water flowing at that pressure.
Voltage is an expression of the available energy per unit charge which drives the electric current around a closed circuit in a direct current DC electrical circuit. Increasing the resistance, comparable to decreasing the pipe size in the water circuit, will proportionately decrease the current, or water flow in the water circuit, which is driven through the circuit by the voltage, which is comparable to the hydraulic pressure in a water circuit.
The relationship between voltage and current is defined in ohmic devices like resistors by Ohm's Law. Ohm's Law is analogous to the Hagen—Poiseuille equation, as both are linear models relating flux and potential in their respective systems. Electric current I is a rate of flow and is measured in amps A. Ohms R is a measure of resistance and is comparable to the water pipe size.
An "amp", short for ampere, is a unit of electrical current which SI defines in terms of other base units by measuring the electromagnetic force between electrical conductors carrying electric current. A "watt" is a measure of power. One watt W is the rate at which work is done when one ampere A of current flows through an electrical potential difference of one volt V.
A watt can be expressed as A watch may draw one-millionth of an amp. Household electrical cables typically are rated for 15 amps or 20 amps. A watt describes the rate of power flow. When one amp flows through an electrical difference of one volt, its result is expressed in terms of watts.
Think of watts not in terms of strength or capacity but speed or rate. The rate of flow of water through a garden hose or a vehicle's speed are good analogies for watts. The base unit ohm is the SI term indicating electrical resistance. Ohm is a measurement of the resistance that a device or material placed within the electrical circuit resists or reduces the electrical flow.
The Greek symbol for omega, resembling a downward horseshoe, is also the symbol that denotes ohms. Watts and volts are not independent of each other. Watts cannot exist without volts since they are the product of a combination of volts and amps. In basic terms and using the hydraulic analogy, volts are similar to pressure and watts are similar to rate.
Understanding the basic concept of rate is key to understanding watts vs. Speaking to a friend about traveling, one could say that the vehicle covered 65 miles. While this is useful information, it doesn't give a full picture of exactly what just happened. You may have said that you drove 65 miles, but what's the greater context of this? Did you drive it in about one hour? That's normal and expected. If you drove it in three months, that's a completely different thing.
This is where time comes into play. Time by itself, too, is incomplete data. If you told the friend that you drove for ten hours, the friend might follow up by asking where you drove or how far you drove. Discussing the length of a car trip is an incomplete set of data.
0コメント