E-Si Ltd’s vision is for all Guernsey properties to have a heat pump and photovoltaics by 2032

November 14th, 2012 by Paul Fletcher

E-Si Limited installs heat pumps, photovoltaic, and solar thermal systems in Guernsey.

As the leading micro-renewable energy installer, E-Si Ltd educates the community about micro-renewable energy systems, and informs opinion about the direction Guernsey should take with its energy policy.

E-Si believes that to safeguard Guernsey’s economic future, it’s infrastructure and long term prosperity, the island has to fast-track renewable energy technology implementation. The island is already years behind many other jurisdictions.

E-Si Limited is forging ahead with micro-renewable energy deployment.

By the end of 2012, the company expects to have installed 70kW of photovoltaic systems and over one hundred heat pumps.

The company foresees massive growth in micro-renewable energy installations but with this growth will come issues of on-island engineering capability, recruitment and training.

E-Si has created a new store, an equipment assembly room for new products, a training room, and a distribution outlet to help deal with the growth in demand.

E-Si Ltd predicts that by 2032 every Guernsey home and business and every commercial industry will use heat pumps in some way for central heating and hot water and solar photovoltaics to offset their electricity use.

E-Si Ltd intends to be the main driving force behind this goal.

When every property has installed photovoltaic systems, Guernsey building energy costs will decline over time.

If our peak demand for electricity is about 90MW, and we can generate 150MW just from solar in 2032, we will be producing more than we consume.

To achieve this goal all heating and electrical distributors and installers need to get involved in renewable energy technologies and energy efficiency.

Guernsey Electricity Ltd., Guernsey Gas Company Ltd, and the oil companies need to change their business models to encompass renewable energy technologies.

E-Si Ltd doesn’t believe the States of Guernsey has to provide grants to facilitate deployment of micro-renewable energy technologies. There is a large market opportunity to upgrade heating and electrical systems to use renewable energy because the price of energy in Guernsey is relatively high – and will likely rise in the medium to long term.

The only way to keep energy costs down permanently is through renewables and not with energy subsidies. The highest UK subsidies are applied to oil and gas for example, in order to help keep energy costs down.

E-Si Ltd asks the States of Guernsey to use government policy to encourage the deployment of micro-renewable energy technologies, and support training and promotion of these technologies, and encourage an uptake of new engineers into the industry.

School leavers should be encouraged into engineering positions of all types, from local industry to further education, on and off Island.

Macro renewable energy generation such as off-shore tidal and wind power will simply plug into, and augment on-shore micro-generation, which will be ‘icing on the cake’ and longer-term, but E-Si believes it is essential to commence macro-renewables business model development now.

E-Si Ltd also considers that the Island’s energy solution should be viewed as one ‘system’, that should be analysed holistically and planned in achievable stages regardless of the pressures from various quarters to maintain status quo.

Most importantly, the Island should have a cohesive ‘energy system’ policy.

Regarding some scenarios, if every Guernsey property had solar photovoltaic panels of 3kW output, total peak output on 21 June at midday would be about 90MW (assuming 30,000 properties), which is currently close to the peak electricity demand for Guernsey (although this occurred in the winter.)

If every property had solar photovoltaic panels of 5kW, total peak output would be 150MW, which is about 15% of the output of a typical nuclear plant of 1GW. Peak output on a sunny winter’s day would be only a little less.

In the case of any power output larger than our instant load use, it would be necessary to store the electrical energy in a battery or perhaps by compressing or freezing air or manufacturing a fuel with the energy such as hydrogen or a low carbon alcohol, or export the electricity to continental Europe.

By installing a heat pump and a small photovoltaic system, homeowners can reduce their heating energy costs by 90%.

By increasing the size of the PV installation, total energy costs can be reduced by up to 100%. Any surplus electricity generated can be exported to the grid.

Base and Peak load demands will rise as heat pump installations increase. Other technologies will come on-line such as fuel cells which will be complementary to heat pumps and photovoltaic systems.

The Island will require back-up power from oil generators and the French nuclear cable link until large-scale battery back-ups or other energy storage technologies become commercially viable and available..

E-Si are undertaking R&D on battery back-up and ‘off-grid’/’on-grid’ hybrids to provide these services for customers in the near future.

The electricity grid infrastructure will be maintained by Guernsey Electricity, which will charge for its use.


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