*Social Energy solar returns and comparison is based upon the following calculations for two comparable systems over a 30 year lifestime:
Social Energy figures based upon a new Social Energy connected SolaX battery and a 4kW Solar PV system with JA Solar JAP60S-1-275 panels with an annual panel degradation of 0.5%, installed in April 2019 in the South of England, at a capex of £8500. Factors include: customer annual electricity consumption of 4000kWh, annual solar generation of 3800kWh, on-site solar usage of 26% (based upon BPVA studies), initial electricity unit rate of 16.45p/kWh with annual electricity inflation of 7.03% (based upon approved data from the Office of National Statistics). These figures include Social Energy benefits from self-consumption, FFR, grid trading, network avoidance and SE export payment of 5.2p/kWh. Returns include factoring in future forecasted costs of a battery system overhaul and solar inverter replacement at year 15. Considering the above factors, the specified system delivers a net benefit of £39,517.30. These calculations demonstrate a 365% ROI for Social Energy.
Early 2012 Feed in Tariff backed solar figures are based upon a 4kW Solar PV installation using Sharp NU 185 panels, with an annual panel degradation of 0.8%, with eligibility for the 43p Feed in Tariff and Export Payments for a 25 year term, installed in the South of England, at a capex of £13,486 (based upon historic data extrapolated from reports from DECC and Parsons Brinkerhoff - https://greenbusinesswatch.co.uk/uk-domestic-solar-panel-costs-and-returns-2010-2017#appendixa ). Factors include: customer annual electricity consumption of 4000kWh, annual solar generation of 3800kWh, on-site solar usage of 26% (based upon BPVA studies), initial electricity unit rate of 11.91p/kWh (calculated from historic Office of National Statistics data) with annual electricity inflation inline with reported ONS figures from 2012 to 2018 and forecasted energy inflation of 7.03% from 2019 onwards. These figures include Feed in Tariff benefits starting at 43.3p/kWh generated, export tariff starting at 3.72p/kWh with an RPI based upon historic data, with a forward projection from 2019 onwards of 3% per annum. Returns include factoring in future forecasted costs of an inverter replacement at year 15. These figures demonstrate a 348% ROI for an early 2012 FiT backed solar installation.
Formula used for ROI is as follows:
