PowerFlow ERS MINI, Installation And User Manual, Page: 6 / 20

3. Product Description
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PowerFlow E.R.S MINI is a grid connected energy diversion system which converts surplus AC
electrical energy, or export, from any grid connected solar or wind generator into heat via a hot
water or space heating resistive load element. By performing this function, surplus energy
generation, which is unable to be used, can be stored and used at a later time when demand
for hot water or heating is required. This results in less energy consumption and in turn leads
to cost savings.
E.R.S MINI is completely independent from the solar or wind generator other than it uses a
current measurement device or CT to calculate in which direction energy is flowing and how
much energy is available for storage. E.R.S MINI performs energy capture purely based on this
measurement alone. This enables E.R.S MINI to work during any time of the day and, together
with the solar or wind generator, to ensure that maximum energy capture is possible.
During times when export occurs, the amount of energy available continually changes due to
changes in generation and changes in building demand. E.R.S MINI automatically adjusts it ’ s
output power level input every 200 milliseconds to match export levels ensuring that only
surplus energy is sent to the heating load.
This method of fast accurate power measurement, combined with fast reacting automated self
adjusting output power makes E.R.S MINI unique. By utilising these control techniques, the
maximum possible self consumption can be achieved through the system.
Only a single E.R.S MINI device can be used on a single phase. For three phase installation,
three devices can be used on each independent phase. E.R.S MINI has also be designed to be
used in conjunction with the PowerFlow Sundial battery storage system.
The diagram below illustrates a typical system layout.