Q: Why should I use photovoltaics (PV)?
A: For a growing number of users, PV is the clear choice. You should definitely consider using a PV system if it operates better and costs less than the alternatives. The cost of energy produced by PV systems continues to drop. However, kilowatt-hour for kilowatt-hour, and depending on where you live, PV energy still usually costs more than energy from your local utility. Also, the initial cost of PV equipment is higher than that of an engine generator. But there are many applications for which a PV system is the most cost-effective long-term option, such as for power in remote areas.
The number of installed PV systems increases each year because their many advantages make them the best option overall. Consider the following issues:
- Site Access: A well-designed PV system will operate unattended and requires minimum periodic maintenance. The savings in labor costs and travel expenses can be significant.
- Modularity: A PV system can be designed for easy expansion. If your power demand could increase in future years, the ease and cost of increasing the PV power supply should be considered.
- Fuel Supply: Supplying conventional fuel to the site and storing it can be much more expensive than the fuel itself. Solar energy is delivered free of charge!
- Environment: PV systems create no pollution and generate no waste products when operating.
- Maintenance: Any energy system requires maintenance, but experience shows that PV systems require less maintenance than other alternatives.
- Durability: Most of today’s PV modules are based on a proven technology that has experienced little degradation in more than 15 years of operation.
- Cost: For many applications, the advantages of PV systems offset their relatively high initial cost.
System designers know that every decision made during the design of a PV system affects the cost. If the system is oversized because the design was based on unrealistic requirements, the initial cost is unnecessarily high. If less durable parts are specified, maintenance and replacement costs will increase. The overall system life-cycle cost (LCC) estimates can easily double if inappropriate choices are made during system design. Don’t let unrealistic specifications or poor assumptions create unreasonable cost estimates and keep you from using this clean power source. As you size your PV system, be realistic and flexible, and select an experienced designer such as GreenPlanet Solar Energy to assist you.
Q: Are there disadvantages to using solar energy?
A: Solar energy technologies often have a higher first cost. This means that a person is likely to pay more money up front to purchase and install a solar system. Still, in nearly all cases, the high initial cost is recovered through substantial fuel savings within the life of the product (25-50 years). This time is significantly reduced by any government incentives in place such as Renewable Obligation Credits or feed-in tariffs.
Q: What is wrong with wind power?
Wind power is an excellent technology and vital in the renewable energy mix required to wean Britain off its unsustainable fossil fuel addiction. However, it requires a lot of space and is only practical when there is an average wind-speed of around 6m/s. This means that it is rarely suitable within an urban landscape. Even when placed rurally it is still constrained by planning permission and the whim of individual planners.
Green Planet dreams of a country covered by PV and wind and are happy to recommend accredited and reputable installers to work with. The two technologies complement each other quite well, especially in an off-grid situation as it is windiest when least sunny and vice versa.
- pv supplier SunPower Solar PV Partner
- Product Fototherm Hybrid PV & Thermal
- accreditation Independent Warranty Association
- accreditation Renewable Energy Assurance
- accreditation Microgeneration Certification Scheme MCS Approved Installers
- pv supplier Suntellite Solar PV Partner
- pv supplier Panasonic Solar PV Partner
- Product VPhase Voltage Optimiser
- Product Immersun PV Water Heating System
- Product EMMA Energy & Microgenerator Manager