PV Solar-How it Works

Solar RoofingSunNet photovoltaic laminates are bonded to the Englert metal roof with wiring connections down to an inverter. The photovoltaic system sends direct electrical current to an inverter where it is converted to alternating electrical current to satisfy the structure's utility loads.

If the photovoltaic supplies more electricity than the structure requires, solar electricity will turn the utility meter backwards and reduce or eliminate the utility bill.

Solar 101: How solar roofing works

Step By Step

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 Leska can install solar roofing to whatever extent you need it.  In addition to our experienced builders, if we install your roof and integrated solar, you will get a full warranty!  Typically, roofers cannot install solar, so if you have solar installed over an existing roof, it will void any roofing warranty that you had.


Energy from the sun, known as insolation or irradiance, strikes your solar panels and excites the photovoltaic module, releasing electrons that creates DC current.  This is the same type of energy that you would get from a battery; What you  need is altertnating current or AC.  That's where the next step starts.


The current is then run from your solar panel to your home's electricity and converted from DC to AC.  For a home that would be 120Volts. The output of the PV system is connected to a junction box, or electrical distribution panel, that electrically connects the PV system to the home.  From here the power goes to where it is needed automatically.  It’s transparent to the home owner.  They turn on the light switch and the light turns on just as it always has.  When electrical loads, such as lights and washing machines are turned on, the PV system sends the power direct into the home, saving electrical utility costs.


If there is no one home, the power is pushed back to the utility where the system owner gets credited by the utility at retail rates.  This is known as net metering.  A special meter is usually required to measure the power in kilo-watt hours, the unit of measure found on every electrical utility bill.  If your solar panels produce more electricity than you use in a giving billing period, it is the electric company's responsibility to pay you!

For a commercial or industrial building, the process is the same.  The voltages and equipment size get larger.