Question 1

How much energy does a solar panel produce?

Accepted Answer

How much energy a solar panel produces depends on its manufacturer and exposure to the sun. A good-quality solar panel typically has a power output of about 300 watts per hour, but this can vary from about 240 to 360 watts. How much energy your solar panel will produce per day depends on how many hours of unshaded daylight it’s exposed to.

Here’s an idea of how much energy you could expect a large commercial solar panel installation to produce in a year.

Solar panel system size, No. of solar panels, Annual electricity output

11kW, 44, 9,350kW

20kW, 80, 17,000kW

30kW, 120, 25,500kW

40kW, 160, 34,000kW

50kW, 200, 42,500kW

Question 2

Is solar thermal worth it in the UK?

Accepted Answer

We certainly think solar thermal is worth it in the UK. While we have cold winters that affects the amount of sunlight we get during those months, solar thermal panels can still generate a little heat in the winter on sunny days, and your back-up boiler or immersion heater can do the rest. The average cost of a 6m2 solar thermal system in the UK is £4,500. While that might seem like a lot of money up front, you’ll be able to make back some of that cost through Renewable Heat Incentive (RHI) payments. The RHI is a Government scheme that pays you for every unit of renewable heat that you generate, and a 6m2 system could earn you up to £525 per year over seven years. That means you could end up paying less than £1,000 for free renewable heat for your home! As well as the RHU, you’ll see a saving on your fuel bills since you’ll be less reliant on your traditional form of heating. If you have a natural gas boiler, you could save up to £60 a year on your bills, while if you’re switching from LPG the savings could be as much as £100 per year. So, we definitely think solar thermal is worth it in the UK! Plus, you’ll be reducing your carbon footprint and contributing to cleaner air for everyone in the country, so you can feel good knowing that you’re doing your bit.

Question 3

How much do solar batteries cost?

Accepted Answer

How much solar batteries cost depends on the brand and type of battery and its capacity. At the moment, the cost is quite high because the technology is still new – but they will probably reduce, just like we saw the cost of solar panels reduce as the technology became more popular. It’s a great idea to get a solar battery installed with your solar panel system if you’re out most of the day. If you didn’t have a battery, all that electricity would simply go to the National Grid – but if you have a storage system, then while your solar panels are generating electricity in the day, it would get stored in the battery ready for you to use when you get home. Lithium-ion solar batteries are the most widely-used ones at the moment because they generally have a higher capacity and are more cost-effective. For a 3-4kWh battery, which would store enough electricity for a typical 4kW solar panel system, it will set you back an average of £3,400. If you need a larger battery, it could cost anywhere up to £6,000. Lead acid batteries are cheaper, and it can seem tempting to ask an installer to fit one for you – but they aren’t cheaper in the long run. While a 4kWh lead acid battery may only cost around £2,000, their life cycle is only around 1,800 cycles. A lithium-ion battery that costs around £4,000 would have a life cycle of about 4,000 cycles. That means that while the upfront cost is more, you won’t have to replace it as quickly as a lead acid one.

Question 4

How much are Tesla solar batteries?

Accepted Answer

Tesla solar batteries are some of the most expensive solar battery storage systems on the market. The Powerwall and Powerwall 2.0 are both excellent options for homes that generate a lot of electricity from their solar panels, but they might not be worth it for those that only have small solar panel systems. But exactly how much are Tesla solar batteries? Since the Tesla Powerwall 2.0 is the latest solar battery, we’ll focus on this one. With installation, you can expect to pay anywhere between £6,500 and £9,000. Other lithium-ion batteries, like SolaX or the LG Chem, will cost around £4,000, so you can see the difference in price. The benefit of the Tesla solar batteries is that they have a huge capacity. Most battery storage systems have a useable capacity of somewhere between 4-8 kWh, whereas the Powerwall has a useable capacity of 13.5 kWh. This is excellent if you have a large solar panel system that generates a lot of electricity, since you’ll be able to store all of it to use yourself rather than sending any back to the grid. However, if your system can’t generate that much, it might not be worth spending the extra money on a Powerwall. Another thing to consider is how long Tesla solar batteries last. The Powerwall 2.0’s standard warranty is 10 years, and Tesla state that it should work at at least 70% capacity for those 10 years. That’s a pretty good warranty, and Tesla says that the battery should last way beyond that. So you could have the Powerwall for around 20 years, making it seem like a better investment. Just consider whether you need such a high-capacity battery before making your purchase.

Question 5

Which commercial properties suit 11-50kW solar panels?

Accepted Answer

It’s vital to purchase a solar panel system that suits your property. If you’re investing in a solar panel system, it makes the most financial sense to get the biggest one possible. However, whether you can do this or not depends on budget and space.

Here’s an idea of how much roof or ground space you’ll need to install a few different sizes of commercial solar panel system.

Solar panel system size, No. of solar panels, Approximate area required

11kW, 44, 64m²

20kW, 80, 116m²

30kW, 120, 173m²

40kW, 160, 231m²

50kW, 200, 288m²

Question 6

Are solar panel batteries worth it?

Accepted Answer

Whether solar panel batteries are worth it depends on how much you’re at home and how big your solar panel system is. If you’re at home most of the day and your solar panels only generate enough electricity for you to use while for that day, then a battery probably isn’t worth investing in. However, if you have a large system that generates more than you can use or you’re out most of the day, then solar panel batteries are definitely worth it.

A solar battery storage system works by storing the electricity that your solar panels generated until you need to use it. That’s why they’re great for people that are out all day – your solar panels generate electricity all day whilst the sun’s out, but no one’s home so you’re using minimal energy except for things like your fridge and any appliances on standby. Most of the electricity charges your solar panel battery. Then, when you get home, your battery will discharge, and you’ll use all the solar electricity that your panels generated during the day.

Solar batteries are also excellent for people with large solar panel systems that generate more than they use in the day. Any electricity that you don’t use during the day will charge the battery, so in the evening when the sun goes down, you’ll just use the excess electricity that’s stored in the battery.

To work out whether solar panel batteries are worth it for you, you’ll need to work out how much of your solar electricity you’re using already. If you’re at home and you’re able to run your appliances all while your solar panels are generating electricity, a battery might not be worth it. Also, if you’re receiving export payments from the Feed-in Tariff Scheme (FITs) or the Smart Export Guarantee (SEG), you might want to look at the rate you’re getting paid. If it’s a good rate, it might be more cost-effective to continue exporting unused electricity to the grid. Speak to an MCS-registered installer that will be able to help you work this out.

Question 7

How many solar thermal panels do I need?

Accepted Answer

Generally, the amount of solar thermal panels you need depends on the number of people living in your home. Experts say that as a rule of thumb you’ll need 1m2 of solar panels for each adult living in your home. So if you live in a 4-person household, you can expect an MCS-registered installer to recommend you a 4m2 system. However, if you have any obstructions near your home that could increase shade on your panels, you might be encouraged to go up to nearer 2m2 per person. You want to make sure that your panels can produce enough hot water for your home as you’ll rely less on your back-up form of heating, which might be a gas boiler or electric immersion heater. Maximise the free energy from the sun and you could save up to £60 per year if you have a gas boiler, £70 if you have an immersion heater or £100 if you have an LPG boiler. Of course, you’ll also need to make sure you’ve got enough roof space for the amount of solar thermal panels that you want, but your installer will be able to advise you on the best course of action.

Question 8

How much do solar panels cost?

Accepted Answer

The cost of solar panels has reduced significantly over the years. While a system may have cost you up to £20,000 in the early days, that’s not the case anymore. So how much do solar panels cost today? The cost of an average 4kW system on an average home will set you back between £4,500-6,500. But pair that with the savings on your electricity bills and payments that you can receive from the Smart Export Guarantee (SEG), the net cost could be much less. The SEG is a payment from your energy supplier for any electricity that you don’t use and send back to the grid. Each energy supplier can set their own rate, but it must be above zero at all times. This replaces the Feed-in Tariff Scheme (FITs) which used to pay solar panel owners per kW of electricity they generated as well as that which they sent back to the grid. This was a much more lucrative scheme which saw homeowners earn back the cost of their system within a few years, but it ended in March 2019. Now, with the SEG and your savings on your electricity bills, you could save up to £330 a year – meaning you could break even within 14 years. Solar panel systems are likely to last up to 25 years, so they’re still well worth investing in. Combine that with the saving of 1.29 tonnes of carbon dioxide every year, and you’ve done your bit for the environment.

Solar Panel Installer job	Solar Panel Installer cost in 2026
Solar panel in Hockley	£2,925-£7,065
Solar thermal in Hockley	£3,000-£4,600
Commercal solar pv 11kw - 50kw in Hockley	£11,200-£16,800
small Commercial solar panel system in Hockley	£7,200-£10,800
Commercial solar pv 51kw+ system in Hockley	£44,000-£66,000
Thermodynamic (solar hot water) in Hockley	£4,125-£6,325
Solar battery in Hockley	£2,140-£6,195
Supply-only solar electricity in Hockley	£2,600-£4,875
Solar repair and maintenance in Hockley	£375-£575
Supply-only solar thermal panels in Hockley	£2,280-£4,275
Solar tiles in Hockley	£4,760-£7,140
Solar panel cleaning in Hockley	£100-£200
Solar panels with battery in Hockley	£3,400-£5,100

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