Inverters - Sizing, Installation and ABYC Standards
HOW INVERTERS WORK
A true sine-wave inverter produces output with the lowest total harmonic distortion (normally below 3%).
It is the most expensive type of AC source, which is used when there is a need for clean sinusoidal output for some sensitive devices such as medical equipment, laser printers, stereos, etc.
For Zero interference and hum, pure sine-wave inverters are available at significantly higher cost.
Learn more in the following video
Watts = Volts x Amps.
Battery capacity is expressed by the amount of Amps per hour that a battery can deliver to support the load applied.
For a 12-Volt inverter system, each 100 Watts of the inverter load requires approximately 10 DC Amps from the battery
For a 24-Volt inverter system, each 200 Watts of the inverter load requires approximately 10 DC Amps from the battery.
The first step is to estimate the total Watts of load, and how long the load needs to operate.
The first step is to estimate the total Watts of load, and how long the load needs to operate .
This can be determined by looking at the input electrical nameplate for each appliance or piece of equipment and adding up the total requirement.
For example, a full-sized refrigerator (750-Watt compressor), running 1/3 of the time would be estimated at 250 Watts-per-hour.
After the load and running time is established, the battery bank size can be calculated.
The first calculation is to divide the load (in Watts) by 10 for a 12-Volt system or by 20 for a 24-Volt system resulting in the number of Amps required from the battery bank..
The batteries will need to deliver 24 Amps to run the refrigerator (240 Watts/10 Volts = 24Amps/Hr).