The rising targets and requirements of the Code for Sustainable Homes has led to somewhat conflicting information and views with regards to what is most practical and cost effective renewable energy solution techniques and methods.
Since inception, Syntegra Consulting has actively approached influential and key decision makers within the building and construction industry with the intention of informing them of fluctuating price changes and cutting edge innovations that aid in achieving code obligations.
The recent drop in the Installation of Photovoltaics (PVs) has resulted in an increasing demand for small scale PV systems to be designed for residential dwelling as opposed to solar thermal. Furthermore, switching to a PV system removes the need for expansion vessels and pumps, thus smaller cylinder and cupboard may be possible.
In terms of price differences, a typical solar thermal system installed into a three bedroom house will cost an estimated £2 600.00 excluding the upgraded hot water storage cylinder. In general, 2 or 3 panel PV systems will displace the same level of CO₂ emissions as the solar thermal at an installation price of approximately £1 925.00 for a similar house. In addition to the difference in price is that PV is less of a burden to upkeep and maintain over its lifecycle and is considered to be attractive from a financial aspect for incoming home owners.
A recent trend that has been experienced and is believed to continue is that reputable house builders are offering upgrading packages to the market place for new houses incorporating PV into the sale.
Key differences between Photovoltaic and Solar Thermal:
- Photovoltaic (PV) panels convert sunlight to electricity that can be used to supplement or replace the electricity supplied by the utility grid.
- PV panels are most commonly installed on rooftops, and are most effective with a southerly exposure that provides full sun.
- Other possible installations include a ground mount, a pole mount, and atop a porch, carport, or other shaded area. PV energy systems are eligible for federal tax credits and state incentives.
- Solar thermal energy, or solar hot water, uses flat collector plates to harness the sun’s energy to heat water for use in businesses, homes, and pools.
- The installation and appearance are much like those of the PV panel, and the collectors are best installed facing south, under unobstructed sunlight.
- Unlike PV panels, solar thermal collectors do not convert sunlight to electricity, but transfer the energy directly to the water.
- Solar thermal systems displace the electricity or natural gas that would otherwise be required to heat water.
