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Solar MPPT Inverters

 

Hybrid Inverter

 

Batteries (Deep Cycle SMF)

 

Solar Charge Controller

 

What is an Inverter ?

 

An inverter takes DC power (battery or solar, for example) and converts it into AC "household" power for running electronic equipment and appliances.

 

Why are they called inverters ?

 

Originally converters were large rotating electromechanical devices. Essentially they combined a synchronous ac motor with a commutator so that the commutator reversed its connections to the ac line exactly twice per cycle. The results is ac-in dc-out. If you invert the connections to a converter you put dc in and get ac out. Hence an inverter is an inverted converter.

 

How is an inverter different than a UPS ?

 

A UPS typically includes the battery and battery charger in one stand alone unit. However, there are UPSs that use external batteries, and PowerStream makes inverters with battery chargers, so the differences blur as features proliferate.UPSs also can have communication with the equipment that it is powering letting the equipment know that it is operating on standby, giving it shutdown warning, or communicating with the human in the loop. Inverters typically don't have this communication.

 

How many types of Inverter ?

 

There are three types of inverter: (a) Square wave inverter. (b) Modified sine wave inverter. (c) Pure sine wave inverter.

 

What is the difference Sine Wave and Modified Sine wave ?

 

Alternating current (AC) has a continuously varying voltage that swings from positive to negative. This has great advantages in power transmission over long distances. Power from your power company is carefully regulated to be a perfect sine wave, because that is what naturally comes out of a generator, and also because sine waves radiate the least amount of radio power during long distance transmission.

 

What about Square Wave Inverters ?

 

These old-fashioned inverters are the cheapest to make, but the hardest to use. They just flip the voltage from plus to minus creating a square waveform. They are not very efficient because the square wave has a lot of power in higher harmonics that cannot be used by many appliances. The modified sine wave is designed to minimize the power in the harmonics while still being cheap to make

 

Do I need Modified Sine Wave or Pure Sine Wave ?

 

Advantages of Pure Sine Wave inverters over modified sine wave inverters: Output voltage waveform is pure sine wave with very low harmonic distortion and clean power like utility-supplied electricity. Inductive loads like microwave ovens and motors run faster, quieter and cooler. Reduces audible and electrical noise in fans, fluorescent lights, audio amplifiers, TV, Game consoles, Fax, and answering machines. Prevents crashes in computers, and glitches and noise in monitors. Reliably powers the following devices that will normally not work with modified sine wave inverters:

 

Laser printers, photocopiers, magneto-optical hard drives Certain laptop computers (you should check with your manufacturer) Some new furnaces and pellet stoves with microprocessor control Sewing machines with speed/microprocessor control Medical equipment such as oxygen concentrators The difference between them is the Pure Sine Wave inverter produces a better . and cleaner current. They are also considerably more expensive. You might find it practical to get a small Pure Sine Wave inverter for any "special need" you may have, and also a larger Modified Sine Wave inverter for the rest of your applications.

 

What is the Low Voltage Alarm & Shutdown ?

 

The low voltage alarm will sound when the DC source falls below 10 volts and the automatic shutdown will power off the inverter. This is done to save your batteries so you can restart your device.