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Battery Storage for Solar PV

 

How it works

‘Energy storage’ lets you store the surplus solar electricity, instead of exporting it. Battery storage lets you use more of your solar PV system’s output (in the jargon, it ‘increases ‘self-consumption’). This reduces the amount of grid electricity you need to buy, saving you money on your electricity bill.

During the day

  • The solar PV system generates solar electricity
  • The battery storage system will check if all the generation is being used to power your lights and appliances
  • If you’re not using all the electricity that the solar PV system is generating, then the system will ensure that any surplus energy is used to charge the battery
  • Once the battery is fully charged, if there is still more solar electricity being generated, this will be exported to the grid (or in some systems, will be diverted to other uses e.g. to an immersion heater)

In the evening or at time of low solar generation

  • The solar PV panels have a reduced or zero output
  • The battery system can discharge the stored electricity, providing you with renewable-generated electricity at no additional cost
  • Once the battery is discharged, if you need to use more electricity, you buy it from your electricity supplier
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Power-cut operation

Despite expectations, some storage systems will not provide power during a power-cut. Some battery storage systems however do have an ‘off-grid’ functionality, providing a limited amount of power to your home, or to essential equipment (such as your fridge-freezer, lighting etc). But a battery may run out of power before the power cut ends – or have already run out of power if it’s been discharging all evening and the power outage starts late at night or early in the morning. If you require your battery storage system to provide power during power-cuts it is important to talk this through with your storage installer from the outset as the system will need to be carefully designed and set-up to your specific requirements.

Does it affect my Feed In Tariff (FIT)?

The generation FIT is paid for every kWh generated by your solar PV system, as measured by your solar generation meter. In addition, the scheme estimates (or ‘deems’) that half of this will be exported back to the grid and pays an export tariff on that ‘deemed’ 50%.

Generation payment

Your generation payment is unaffected in any way by the installation of your battery storage system. The solar electricity that is used on site or that goes to charge the batteries is registered by the generation meter at the time it is generated regardless of whether it is used onsite or sent to your battery storage system.

Export payment

Your export payment is currently paid on a ‘deemed’ 50% of your solar PV system’s output, regardless of how much electricity you actually export or store.

Your FIT export tariff income will be unaffected if you store, rather than export, surplus solar electricity.

 

 

See our happy customers below

Elizabeth – Essex CM7

‘The fact the Solar Assisted Heat Pump is only dependant on air - as opposed to solar is a real advantage, because I am receiving really hot water at anytime of the day or night. It has been working brilliantly ever since it was installed and gives ne great satisfaction.’
5.0
2018-05-25T08:40:44+00:00
‘The fact the Solar Assisted Heat Pump is only dependant on air - as opposed to solar is a real advantage, because I am receiving really hot water at anytime of the day or night. It has been working brilliantly ever since it was installed and gives ne great satisfaction.’

George

A very friendly and professional company. Walked us they the whole process and have continued to pay great attention to customer care since installation.
5.0
2019-06-06T13:27:17+00:00
A very friendly and professional company. Walked us they the whole process and have continued to pay great attention to customer care since installation.

Nathan

What a fantastic service! Nothing was too much trouble and we can't recommend them highly enough!
5.0
2019-06-06T13:21:15+00:00
What a fantastic service! Nothing was too much trouble and we can't recommend them highly enough!

Jeanne , NR8

I cannot thank wise green energy enough for their professionalism and care over the installation of our solar panels, batteries and air source heating system. They are professional, caring and passionate about alternative energy sources as well as being able to explain how these work in a way I can understand! Our bills have gone down as well as us receiving the feed in tariff from our solar panels. Having recently had the air source heating system installed, I am waiting to see how much more our bills have gone down. We no longer put our radiators on when it gets chilly and have noticed that the quality of the air in our house is much improved. It never feels stuffy! I just wish we'd had it installed earlier before the heat wave this summer. Once again thank you to everyone at wise green energy for their knowledgeable, friendly and efficient staff. I would recommend you to anyone looking to do their bit for the planet and to reduce their bills.
5.0
2019-06-06T09:52:16+00:00
I cannot thank wise green energy enough for their professionalism and care over the installation of our solar panels, batteries and air source heating system. They are professional, caring and passionate about alternative energy sources as well as being able to explain how these work in a way I can understand! Our bills have gone down as well as us receiving the feed in tariff from our solar panels. Having recently had the air source heating system installed, I am waiting to see how much more our bills have gone down. We no longer put our radiators on when it gets chilly and have noticed that the quality of the air in our house is much improved. It never feels stuffy! I just wish we'd had it installed earlier before the heat wave this summer. Once again thank you to everyone at wise green energy for their knowledgeable, friendly and efficient staff. I would recommend you to anyone looking to do their bit for the planet and to reduce their bills.

Janice

We had our thermodynamic hot water panel fitted by Wise Green Energy approximately 3 years ago now and have been asked to provide some feedback, which we are happy to do.

Since we have had our new panel we have never had to use either the immersion or boiler and what we like about it is that we have hot water on tap all the time and it works at night and in the winter which our previous solar tubes could never do....also helping to extend the life of our poor 20 year old boiler.

From start to finish Wise Green Energy have been very polite, informative but professional and at the same time, as we feel that some companies we’ve dealt with in the past have been over friendly to compensate for their lack in professionalism...also too pushy and make promises they can’t keep.
5.0
2019-06-06T13:30:56+00:00
We had our thermodynamic hot water panel fitted by Wise Green Energy approximately 3 years ago now and have been asked to provide some feedback, which we are happy to do. Since we have had our new panel we have never had to use either the immersion or boiler and what we like about it is that we have hot water on tap all the time and it works at night and in the winter which our previous solar tubes could never do....also helping to extend the life of our poor 20 year old boiler. From start to finish Wise Green Energy have been very polite, informative but professional and at the same time, as we feel that some companies we’ve dealt with in the past have been over friendly to compensate for their lack in professionalism...also too pushy and make promises they can’t keep.

Catriona, Suffolk, IP17

‘I was delighted with how quickly and easily our solar assisted heat pump was installed. The guys had this on the wall and the compressor fitted within 4 – 5 hours with no mess at all. I can’t believe how it now provides all our hot water. I feel I want to rush out and tell everybody about it’.
5.0
2018-05-25T08:41:47+00:00
‘I was delighted with how quickly and easily our solar assisted heat pump was installed. The guys had this on the wall and the compressor fitted within 4 – 5 hours with no mess at all. I can’t believe how it now provides all our hot water. I feel I want to rush out and tell everybody about it’.

Mark , Gillingham , ME5

I made a substantial financial investment into solar energy, battery storage and air source hot water heating with Wise Green. A truly professional and courteous service from first contact through fitting of the units to a minor repair several months after installation when a valve failed. I spend my money carefully as it takes a long time to earn, but if you're interested in saving and making money while doing your bit to save our planet then I would wholeheartedly recommend you give Wise Green a call. Battery storage means that during the summer months I don't buy from the national grid and get paid as an energy supplier! Win win.
5.0
2019-06-06T13:32:04+00:00
I made a substantial financial investment into solar energy, battery storage and air source hot water heating with Wise Green. A truly professional and courteous service from first contact through fitting of the units to a minor repair several months after installation when a valve failed. I spend my money carefully as it takes a long time to earn, but if you're interested in saving and making money while doing your bit to save our planet then I would wholeheartedly recommend you give Wise Green a call. Battery storage means that during the summer months I don't buy from the national grid and get paid as an energy supplier! Win win.

Ana, Diss, IP21

I would like to praise the efficient way the work was carried out at my bungalow. The solar assisted heat pump is proving to be very successful with hot water every time we turn the tap on, no immersion heater needed which saves money and is very eco friendly’.
5.0
2018-05-25T08:41:15+00:00
I would like to praise the efficient way the work was carried out at my bungalow. The solar assisted heat pump is proving to be very successful with hot water every time we turn the tap on, no immersion heater needed which saves money and is very eco friendly’.

Alan and June, Sheringham, Norfolk

We are in the  8th week of enjoying our Air source heat pump system. During this time the weather has been unseasonably cool and we have never had to resort to using our gas boiler for heating.

The installation was smooth and efficient, the unit itself is attractive and unobtrusive.  We are loving guilt free warm air at the touch of a button, and intend to rely on green energy for as long as possible . As a retired couple we are active and not given to sitting around all the time but neither do we deny ourselves the comfort of heat.
We would recommend your product to anyone, especially given recent reports of the consequences of our reliance on fossil fuels. We feel we are doing our bit for the environment and in the longer term reducing our heating costs.
5.0
2019-06-19T10:31:07+00:00
We are in the  8th week of enjoying our Air source heat pump system. During this time the weather has been unseasonably cool and we have never had to resort to using our gas boiler for heating. The installation was smooth and efficient, the unit itself is attractive and unobtrusive.  We are loving guilt free warm air at the touch of a button, and intend to rely on green energy for as long as possible . As a retired couple we are active and not given to sitting around all the time but neither do we deny ourselves the comfort of heat. We would recommend your product to anyone, especially given recent reports of the consequences of our reliance on fossil fuels. We feel we are doing our bit for the environment and in the longer term reducing our heating costs.
5
9

This form collects your name and email address so that our support team can communicate with you and provide assistance. Please check our Privacy Policy to see how we protect and manage your submitted data.

I consent to Wise Green Renewables to collect my data via this form.