Why Solar? --> FAQs
FAQs
This section is being updated. If you don't see the answer to your question here, contact us and we'll be happy to answer any questions that you have.
What's the Difference Between On-grid Solar and Off-grid Solar:
On-grid Solar:
Most photovoltaic (PV) systems are connected to the local or regional power supply company such as PG&E or SMUD (known as "the grid"). These systems are called grid tie or grid interactive. This means that if your PV system is producing more power then you are consuming, that power gets fed back into the grid (info on feed in tariffs click here). At night, or at other times when your PV system is not producing as much power as you are consuming, power is supplied by the grid.
Off-grid Solar:
Some PV systems are completely independent of the grid. In an off-grid system the energy produced when the sun is shining is stored in batteries. These batteries then supply power when the sun isn't shining. For those in remote locations off-grid systems can provide self-sufficient reliable power year round. In an off-grid solar powered home generators are sometimes needed as a back up to maintain battery charge during long periods without sunshine (unless either micro, hydro or wind generation is a viable supplement).
Battery Backed Solar:
In situations where you are grid connected but susceptible to frequent power outages, or must have a power back up option, a generator or battery back up system can be installed. This allows you the convenience of a grid-tie system, with the extra security of a back up system should the grid not be available.
Does solar really pay for itself?
The financial case for solar is quite clear. The exact payback on a solar installation varies, but generally solar systems tend to pay for themselves within 7-12 years. That might sound like a long time, but how soon is your current energy source going to pay for itself? Given that PV systems generally last 25 years or longer, the return on investment (ROI) for a typical system is quite impressive. A detailed financial analysis is always part of our project assessment process, so you'll have a detailed custom analysis to advise your decision to go solar.
How Many Solar Panels Do I Need?
Information on system sizing will be added soon.
What is the Best Solar Panel for Home or Business?
Information on types of solar panels will be added soon.
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