UPS & Invertor
In an online UPS, the batteries are always connected to the inverter, so it isn’t necessary to have a power transfer switch. When a loss of power occurs, the rectifier just drops out of the circuit and the batteries keep the flow of power steady and unchanged.
When the power is restored, the rectifier resumes carrying most of the load and also begins charging the batteries. However, the charging current may be limited to prevent the high-power rectifier from overheating the batteries and boiling off the electrolyte. The most beneficial advantage of an on-line UPS, in comparison with the other types of UPS, is its ability to provide an “electrical firewall” between the incoming utility power and sensitive electronic equipment.
The online UPS is ideal for environments where electrical isolation is necessary or for equipment that is very sensitive to power fluctuations. However, with the advances in technology, the online UPS unit was once only used for very large installations of 10 kW or more. Now they are available as a common consumer device, supplying 500 W or less.
The initial cost of the online UPS may be higher, but its total cost of ownership is generally lower due to longer battery life. The online UPS may be necessary when the power environment is “noisy”, when utility power sags, outages and other anomalies are frequent, when protection of sensitive IT equipment loads are required or when operation from an extended-run backup generator is necessary.
The basic technology of the online UPS is the same as in the standby or line-interactive UPS. However, it typically costs much more, due to it having a much greater current AC-to-DC battery-charger/rectifier, and with the rectifier and inverter designed to run continuously with improved cooling systems. It is called a double-conversion UPS due to the rectifier directly driving the inverter, even when powered from normal AC current.
How does it work?
Just how does sunshine become electricity? Here’s an overview of the components that are required to generate your own clean, affordable and reliable energy.
The Solar Panels are made up of Photovoltaic Cells (PV) that convert sunlight in to Direct Current (DC) electricity
The Solar Inverter (Grid Tied/Off Grid/Hybrid) converts the DC electricity generated by the Solar Panels in to Alternating Current (AC) electricity at 110V/220V.
The AC electricity is sent from the inverter to the Electrical Panel that distributes the AC current to power your lights, appliances and other general loads using solar energy.
The utility meter provided by your local electricity company tracks your energy use. The Utility Meter typically goes forward when consuming electricity from the grid. However, with a Solar Power system installed, it is possible for it to go backwards when the Solar Power System generates more energy than you need immediately.
Your regular electricity connection provided by your local electricity connection still remains active. The power from this is used at night time or when your immediate power needs are greater than the capacity of the Solar Power System installed by you.
Battery banks can be used to store some energy generated by the Solar Power System for use during power cuts. This option allows consumers that get a few hours of power cuts a day to get 24×7 electricity using solar energy.
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