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The headache of any solar PV system owner ? exporting too much of power and no way to store them ! A 4kW produces above 3.5 kW during the peak hours and personally I have seen my system clocking more than 4 kW during sunny autumn months . 90% of that production is exported until the energy demand is properly managed.

That’s e where exactly our solar immersion switch comes in. The pv heater switch monitor the PV power and manage the load to maximize the system efficiency.

Several ways exist to store the surplus power and use it later when the demand increases. Batteries offer the facility to store the power, but maintenance could be an issue. Hydrogen storage needs innovations to make it safe.

In Europe, with its cold weather, probably storing the surplus power as hot water could be the most efficient way, as we buy costly energy to heat water. Why buy energy when you have surplus power inhouse ?

The solar pv controller monitor the pv production / house consumption  and divert the surplus power to the immersion heater to store the free energy as hot water for future use.  The savings ? Normal house hold that use gas for heating water saves around £100 and if you use oil, the savings could be much higher, standing at around £200. That makes the system a great investment offering full return of investment in less than 2 years. If you are at the old fit rate, the switch itself  is less than 3 months worth of the FIT payment.

On a normal day, the boiler hardly wakes up to heat the water and on a dull winter day, the effectively pre-heat water reducing the load on the boiler and saving on your gas bill.

The factors that are not considered here – The CO2 savings !

Now tell me – Does it not make financial sense to invest in these switches ?

Some of our clients were asking about the possibility of using an RF switch together with the solar PV heating switch – It looks very straight forward, simple to use when compared with a wired connection.

But we recommend to use the existing immersion wiring running from the consumer unit via an MCB for safety. It makes the whole system stable, secure and simple. You could also forget about replacing the batteries on the RF units . If the batteries run out on these units, either the immersion will never turn on or may remain turned on for ever ending up with a huge electricity bill. Poorly designed cheap RF switching units could interfere with other electronic units resulting in weird behaviour costing you money.

All our switches are designed to use the existing immersion wiring and to be installed near the consumer unit itself – So you could easily get access to the immersion wiring and the incoming grid lines to clip the sensor on.  That makes a neat install with a single unit managing the immersion heater with the safety of the inline MCB.

Replacing an existing immersion is a messy job, especially if you are in a hard water area. Plumbers usually use the thread sealing compound while they install the immersion and this makes the messy job a harder one. if done without care, you may end up replacing the whole tank itself!

Power reducer unit offer a very convenient way to reduce the existing 3 kW immersion to a 1.5 kW or a 2kW to a 1 kW immersion. This compact, simple add is easy to install and help to avoid the plumbers cost.

The new Mark II version of  the solar PV power controller switch is available now. The switch sense and measure the exported power to the grid from the PV system with a single sensor. The single sensor model makes the installation of the switch a very simple task. The existing immersion wiring from the consumer unit is used to control the immersion heater and this makes the switching circuit  stable and reliable.

The Mark II is designed and manufactured in UK to make sure the customer gets a quality product. The internal DIN rail offer the options to extend the system as per the customer requirements. for example, the switching capacity of the switch could extended from the internal 16A to any 50A with a simple DIN rail relay add-on.