One of the limitations of some grid-tied photovoltaic systems is that the owner will only benefit as long as there is sunlight while the grid is functioning. Otherwise, if there is an outage, they may not even use the energy they are generating from the rooftop. During such times when the grid is disconnected, the owner can neither use the rooftop solar nor export the energy to the grid.

Owners of PV systems without backup functionalities can upgrade by adding AC coupling. This enables them to store energy and use it anytime, including during emergencies and grid outages. The AC coupling converts a simple grid-tied system into a Grid/hybrid or grid interactive system. This provides grid-ties savings whenever the grid is up and running, and off-grid independence, as well as security when there is a utility outage.

The main components of AC coupling include an energy storage system, a grid-interactive inverter/charger, a coupling device and the second panel with additional wiring for the critical loads to supply during outages.

Battery storage enables better power management by providing a number of benefits which include:

Pay as you go electricity plans allow consumers to pay for their electricity in advance. The plan, which uses prepayment meters, helps consumers to monitor and control the way they use electricity. This saves on energy costs.

Keypad based prepaid meters: This meter has a keypad to input the electricity token number. Consumers purchase the credit using a variety of methods. These include visiting the agent, paying through banks or mobile payments in some countries.

Key meter: Consumer uses an electronic key loaded with the tariff information and credit.

One way card system: Uses a disposable card. The user purchases power with a reloadable debit card. The loaded card is then passed near the meter, which has an in-built card reader.

Two-way card systems: Uses a smart card and the meters have a real-time, two-way communication capability. It is one of the most secure, but more complex and expensive methods to implement.

These allow consumers to interact with their meters and query balances using their mobile phones by sending an SMS to a monitoring system. In addition, the user is able to track electricity use by the hour, day, month or annually using the phone or online access.

These smart prepaid meters offer easier top up options. They include online payments or by text, as well as scheduled and auto top-ups.

When using a prepaid meter, the customer must keep track of the remaining credits and replenish to avoid disconnection.

Ensure there is enough credit when going away for long periods. The meter will continue collecting the standing charges even when on no load. Consumers should ensure they have enough credit to last until they return.

Some crooks will take advantage of the consumer’s lack of knowledge and offer them cheaper credits than those bought directly from the utility company. For example, they will sell their credits at half price. This is more common with Key Prepaid Meters and the crooks will usually have master Keys, which they use to top off the consumer’s meter.

If the energy company finds out, the consumer ends up paying twice for their electricity; first to the crook, and then to the energy company.

To avoid falling victim:

What better way to celebrate Independence Day than to do so in Virginia, one of the first colonies to create talks of revolution against the British? Virginia had a huge rule in the American Revolution. In fact, our first president of the United States, George Washington, was from Virginia! Thomas Jefferson helped expressed reason for colonial independence from Great Britain by writing the Declaration of Independence. The last major battle of the Revolutionary War was fought in Yorktown, Virginia and that victory led to the end of the war.

Virginians have a lot to be proud about for their involvement in the American Revolution, so you know we love to celebrate July 4th big! Our fireworks are always over-the-top and our parades are the best in the country. If you’re planning to celebrate big this Independence Day, consider these activities to do the weekend of July 4th. Make this Independence Day a day to remember!