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Title: Photovoltaic metering configurations, feed-in tariffs and the variable effective electricity prices that result
Authors: McKenna, Eoghan
Thomson, Murray
Keywords: PV generation
Import price
Feed-in tariffs
Photovoltaic metering configurations
Electricity bill reduction
Export price
Generation payments
Physical meter arrangement
Grid-balancing
Financial benefit
Household demand
Tariff configuration
Issue Date: 2013
Publisher: © Institution of Engineering and Technology
Citation: MCKENNA, E. and THOMSON, M., 2013. Photovoltaic metering configurations, feed-in tariffs and the variable effective electricity prices that result. IET Renewable Power Generation, 7 (3), pp. 235-245.
Abstract: Occupants of dwellings with photovoltaic (PV) systems can often benefit financially by time-shifting their use of electricity in relation to the times when the PV is generating. This financial benefit is owing to differences between the import and export prices, which in some cases can be a factor of four or more. Quantifying the exact financial benefit in terms of the dwelling’s effective electricity prices is, however, not trivial; it depends on the physical meter arrangement, the dwelling’s electricity tariffs (including any feed-in-tariff), the instantaneous levels of PV generation and household demand. This study reviews typical metering and tariff configurations for the UK, and Germany, and systematically considers how the effective price may be calculated. This study reviews and expands upon general advice for occupants aiming to reduce electricity bills: demand should be kept below generation; external irradiance is a useful proxy for determining effective electricity prices. Furthermore, designers of feed-in tariffs should consider that focusing on generation payments encourages consumption typically around mid-day, which may be counterproductive from a grid-balancing and environmental perspective. Conversely, a focus on export payments discourages mid-day consumption but may increase the risk of over-voltages in local networks.
Description: This article was published in the journal, IET Renewable Power Generation [© The Institution of Engineering and Technology]ánd the definitive version is available at: http://dx.doi.org/10.1049/iet-rpg.2012.0268
Version: Accepted for publication
DOI: 10.1049/iet-rpg.2012.0268
URI: https://dspace.lboro.ac.uk/2134/12618
Publisher Link: http://dx.doi.org/10.1049/iet-rpg.2012.0268
ISSN: 1752-1416
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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