All the product sin this size range are intended for
installation in a plant room, and thus only suitable for guest houses,
small hotels, residential homes or small commercial buildings. All
require the addition of a peaking boiler and may be installed in cascade
with a number of other CHP units or alternative heating sources.
Normally the electrical and thermal output can be
modulated to optimise the value of electricity produced by matching it
to the internal demands of the property or by maximising run hours as
desired. In some cases the products are offered on an ESCO (Energy
Service Company) basis to minimise the capital invested by the customer.
Not suitable for individual homes, but, according to
the UK government official definition of "microgeneration" as being any
generation source below 50kWe, it is "micro CHP".
This product incorporates a package of components including the
engine/generator, a supplementary boiler, heat exchanger and integrated
control system. Rather uniquely it offers a sophisticated control
with the option of heat or electrically led operation, with the engine
being capable of a wide modulating range. It is ideally suited to
that difficult to address middle ground between individual homes and
multi-occupancy buildings and is included here for those with an
interest in small apartment blocks, sheltered housing etc.
Both diesel and gas-fired versions are available, each with electrical
output of up to around 15kWe. The gas-fired model is based on a
Toyota engines renowned for reliability and long life, whilst the diesel
and biodiesel models use Deutz engines.
The Yanmar product was recently launched
in the UK market following installation of around 600 units in
Unlike the EC Power unit, Yanmar offer a
packaged system which is somewhat less flexible than the EC Power
unit, although this should be offset by their offering the product
in a range of sizes between 4-25kWe.
In late 2007 Yanmar initiated a 3 year
demonstration programme of their biodiesel variant which will
eventually become available with an output of 25kWe.
Yanmar packaged units, suitable for
external location, are now available from
ENER.G with outputs of 4kWe, 10kWe
In September 2009, VW announced a plan
to install 100,000 of their 20kWe "EcoBlue" mini CHP units in
collaboration with energy service partner Lichtblick.
Initially units will be available in the
Hamburg area, then from 2010, Lichtblick plan to expand their market
into the remainder of Germany.
The units will be leased by customers
who will pay an initial deposit, a monthly service charge and a
favourable unit price for each kWh of heat and electricity consumed.
The most recent addition to the Vaillant
CHP product range is the ecoPOWER 20.0kWe, launched in 2013.
It is aimed at buildings with an annual
thermal demand in excess of 150,000kWh, such as apartment blocks,
restaurants, hotels, sports halls and swimming pools.
£23,000 depending on variant
Not for sale; customer pays €5000
deposit plus a monthly charge for service and kWh price for heat and
€50,000 less €3,500 subsidy