As solar panel systems are used more and more, the physical quantities of solar systems are coming into the public’s business. In this article, we will introduce you to the relationship between milliampere hours, watts, and the conversion between the two. Understanding this electrical knowledge is especially important when selecting, purchasing, and optimizing your solar panel system.
First, we need to understand some basic physical quantities and units of measurement.
1. What is a milliampere-hour (mAh) and what is an ampere-hour (Ah)?
Milliampere hour is a unit of energy, known as milliampere hour, symbolized as mAh. It is usually used to measure the capacity of a battery. 1mAh is defined as the amount of energy released by a battery that maintains an output current of 1mA for 1h. Its specific definition formula is:
1mAh=1mA×1h
As an important attribute of a battery, milliampere-hour is particularly important when selecting and handling large energy storage battery packs as well as cycling battery packs.
And the ampere-hour is also a unit of energy as well as the milliampere-hour, which is fully called ampere-hour and symbolized as Ah. For the relationship between milliampere-hour and ampere-hour, since they belong to the same unit of measurement of physical quantities, they can be directly converted by the following formula:
1mAh = 0.001Ah
2. What is a watt (w)?
A watt is a unit of power, also known as a watt, symbolized as w. It is usually used to measure the amount of energy an electrical appliance needs to supply to complete its work. Solar panel systems on the market are often sold in watts, so the wattage value is one of the most important attributes when purchasing your solar panel system.
3. What is a watt-hour?
A watt-hour is a unit of energy, known as a watt-hour, symbolized as Wh. 1Wh represents the amount of energy consumed by a 1w electrical appliance running for 1h, defined by the formula:
E (Wh) = P (w) × T (h)
The watt-hour is widely used within the power industry as a standard unit of power consumption over a period of time. It is often used to measure the capacity of batteries and the amount of power consumed by appliances during use. It can help energy suppliers and users to understand the specific power usage.
4. How to convert milliampere-hour to watt?
The conversion from milliampere-hours to watts can be done after learning the units of measurement of the physical quantities mentioned above. Although both mAh and watt are units of electrical physical quantities, they are not the same unit. In order to convert between the two, we first need to introduce a new unit of measurement for physical quantities: the watt-hour. And convert milliampere-hour to watt-hour:
E (Wh) = {E (mAh) × V (v)} ÷ 1000
It is worth noting that the 1000 in the above equation is due to the fact that volts and watt-hours and milliamp-hours do not belong to the same class of units of measurement, and in order to make calculations between the three possible, it is necessary to convert volts to millivolts (mv). And the conversion multiplier between the two is 1000, i.e.: 1v=1000mv. Simplifying the above formula, we can obtain the conversion formula from milliampere-hour to watt-hour:
Watt-hours = (mAh x volts) ÷ 1000
After converting milliampere-hours to watt-hours, watt-hours can be converted to watts according to the formula defining watt-hours:
P(w) = E(Wh) ÷ T(h)
The formula for converting milliampere-hours to watts can be obtained by combining the two step-by-step formulas from all of the above conversions:
P(w) = {E(mAh) x V(v)} ÷ 1000 ÷ T(h)
While the formula may seem complicated, you can also choose to base your calculations on the step-by-step formula above, which is a simpler process overall.
