Have a Question?
Our Frequently Asked Questions (FAQ) page is designed to provide you with quick and easy answers to common questions about our products and services. We have tried our best to cover all the generic questions that our customers may have, and we hope that you will find the information you are looking for on this page.
However, we understand that you may have specific questions or concerns that are not addressed in our FAQ section. In such cases, please do not hesitate to reach out to our friendly and knowledgeable staff. We are always happy to assist you and answer any questions you may have.
What is the Tesla Powerwall?
The Tesla Powerwall is a rechargeable home battery that stores electricity for later use. It can store energy from:
- Solar panels
- The grid (especially off-peak electricity)
It helps power your home during outages and reduces reliance on the grid.
How does the Tesla Powerwall work?
The Powerwall stores energy and automatically supplies it when needed:
- During the night (if charged by solar during the day)
- During power cuts (backup power)
- During peak electricity prices
It works seamlessly with solar systems or as a standalone battery.
How long can a Tesla Powerwall power a home?
- A single Powerwall stores 13.5 kWh
- It can power essential appliances (lights, fridge, Wi-Fi) for hours to a full day
- Larger homes may need 2–3 units for extended backup
Actual duration depends on your energy usage.
How do you monitor and control it?
You use the Tesla app to:
- Track energy usage in real time
- See solar production and battery levels
- Control backup settings and charging preference
Can the Tesla Powerwall work without solar panels?
Yes. You can charge it directly from the grid:
- Store cheap electricity (e.g., overnight tariffs)
- Use it during expensive peak times
However, pairing it with solar maximises savings and sustainability.
Does installing a battery effect my feed in tariff?
No it doesn’t effect F.I.T payments.
You get paid to generate electricity even if you were to use all the electricity you make you would still be paid.
You also get paid an export rate which is usually a few pence per kWh. Some energy company estimate you will use 50% of what you generate, in this case you will be paid 50% export so adding a storage system won’t effect you at all. If you are paid per kWh to export you might find yourself around £20 per year worse off but the amount you’ll save by having the battery far outweighs this.
Do I have to notify my F.I.T payment services that I’ve installed a battery?
Every 3 month, 6 months or 12 months when you submit your generation meter readings, the provider may/will ask have you made any changes to the system. This is the opportunity to let them know you’ve installed a battery. Sometimes schematic drawings are required which we can supply.
How long do batteries last ?
Anywhere from 15-30 years depending on the manufacturer and the amount of cycles the batteries are capable of.
Are batteries big in size?
Depending on the manufacturer batteries are available in all different shapes, sizes and capacities. Over the last 10 years batteries have become significantly smaller, Most battery cells are around
500mm length x
400mm height x
200mm depth per cell
They can either be wall mounted or stacked on top of each other.
How long does it take to recoup your initial outlay?
Close to the fuse board, meter and main incoming ac supply. Some houses have fuse boards under the stairs, up high in the corner of the room near the coving, in kitchen cupboards or potentially in a sunken electrical box on the outside of the property.
Batteries needs their own ac supply and a data cable connection to monitor consumption in the property the data cable needs to be connected to the main incoming ac supply. Some clients prefer the battery system to be installed in the attic area close to the Solar inverter, this is fine and easy for us to facilitate.
Where is the best place to install a battery?
Our Frequently Asked Questions (FAQ) page is designed to provide you with quick and easy answers to common questions about our products and services. We have tried our best to cover all the generic questions that our customers may have, and we hope that you will find the information you are looking for on this page.
However, we understand that you may have specific questions or concerns that are not addressed in our FAQ section. In such cases, please do not hesitate to reach out to our friendly and knowledgeable staff. We are always happy to assist you and answer any questions you may have.
Is monitoring the battery difficult ? How is it monitored?
Monitoring your battery is easy. From the lux monitoring app that can be downloaded onto any iOS device, android ,laptop or computer, the end user and ourselves have the ability to login to your personalised portal from anywhere in the world,providing there is internet. From the portal you can see the household consumption, battery capacity, your generation for the day and exactly what is being generated at that point and finally your export back to the national grid.
How does a battery charge ?
There are 2 ways in which the battery will charge. The first is from any excess power you generate but don’t consume, instead of exporting back to the grid the battery will automatically charge up.
The second charging option is directly from the national grid during the night when electricity is cheaper to purchase from your energy supplier, this is known as a smart charging.
The Agile tariff from octopus or economy 7 tariffs from British Gas, Eon and ulility warehouse are the most popular among our clients.
How long does it take to install a battery storage system ?
Installations takes between 1 and 3 hours depending on its location and accessibility.
Can a batteries capacity be increased ?
Yes, battery capacity can be increased as and when it’s necessary.
You can have a maximum of 8 cells to each battery control unit.
How fast can a battery charge and discharge ?
The lux control units are 3600 watts the maximum charge and discharge rate is 3.5 kwh, meaning in 1 hour you can either store or use 3.5kwh from your battery system.