Frequently asked questions

  • Do I need a solar PV or other renewable energy system to take advantage of a WATTSTOR™ system?

Yes, the WATTSTOR™ system saves electricity generated by your PV or other renewables systems for later use rather than exporting it to the grid.

  • How does the WATTSTOR™ work?

The WATTSTOR™ detects when power is being exported from the property. When this happens it will firstly supply your domestic loads (washing machines, tumble dryers, dishwashers etc.) and when these are satisfied it will then divert the surplus renewable power to charge the batteries. If there is still surplus power available this will be diverted to the immersion heater in a hot water tank to provide FREE hot water. When there is no renewable power being generated, the batteries will supply power to your property.

  • How much electricity can I store in the batteries?

The WATTSTOR™ 3/3 can store 3kWh (units) of electricity.
The WATTSTOR™ 5/6 can store 6kWh of electricity.
Thereafter in multiples of 3kWh extension packs.

  • How long is the warranty on a WATTSTOR™ system?

The standard warranty for the whole WATTSTOR™ is 5 years. The battery warranty can be extended to 10 years for a small additional cost.

  • How much electricity do I need to consume to make a WATTSTOR™ worth installing?

This depends not just on your usage but also when the electricity is consumed. Generally a household consuming more than 4000kWh per year which is typically unoccupied during the day would benefit from a WATTSTOR™. All properties are different and the WATTSTOR™ can be tailor-made to suit.

  • What happens when the batteries are full and I’m still generating electricity?

When the batteries are full and hot water tank is up to temperature, any surplus electricity is then sent to the grid. This can be avoided by adding additional batteries.

  • What happens if there is a power cut?

The WATTSTOR™ will continue to supply electricity to your home until the batteries are exhausted. However, your PV or other renewable energy system will still be able to generate electricity and can be used to supply your appliances and recharge the batteries. Without a WATTSTOR™, your renewable energy system would shut down.

  • Can I increase the storage capacity?

Yes, the available storage can be increased in multiples of 3kWh.

  • Where can the WATTSTOR™ be installed?

The WATTSTOR™ can be located in any covered area, e.g. garage, utility room, external housing. Ideally, it should be sited as close as possible to the electricity meter or consumer unit. The Wattstor surveyor will be able to advise you.

  • Will I lose any FiT (Feed in Tariff) income?

No. For renewable systems up to 30kW capacity (90% of UK systems) the amount you export to the grid is not metered so no income will be lost.

  • Is it compatible with the solar iBoost? 
    YES! - There is no need to change to the wattstor equivalent. The solar iBoost is completely compatible. The excess energy will be sent to your Wattstor first and then your IBoost, once they have taken what they need all other energy will be exported to the grid.

SE Electrical Services 
Unit 3
Village Workshops,
Four Crosses
SY22 6ST  


01691 839447 

E-mail: se-elec@outlook.com

Emergency contact number

Outside office hours, please dial: 07810874905

Print Print | Sitemap
SE Electrical Services is a part of © SkyEnergy Installations ltd Agricultural, Domestic, Commercial, Industrial, Testing, Rewire, Solar, Nest, Building, Battery back up , Solar PV Lighting, Led. Areas covered: Electrician Welshpool, Electrician Oswestry, Electrician Shrewsbury, Electrician Llanfair, Electrician Llanfyllin, Electrician Llanymynech, Electrician Pant, Electrician Meifod, Electrician Llansantffraid, Electrician Montgomery, Electrician Churchstoke, Electrician Wrexham Units 3 & 4, The Village Workshops, Four Crosses, Llanymynech, SY22 6ST