Solar Performance
“Why is my solar generating less than usual?”
Not sure what a fault code means, why your solar generation has dropped or whether your battery is behaving normally? Send your question to Mr Solar and our team will help you understand the sensible next step.
You do not need to know the technical language. Tell us what the system is doing, include any warning code you can see and we will help point you in the right direction.
“Why is my solar generating less than usual?”
“What does this red light or error code mean?”
“My solar has completely stopped producing electricity.”
“Why is my battery charging or discharging differently?”
“Will this change affect my Feed-in Tariff or export payments?”
Some questions can be answered from the information you provide, but no remote assessment can electrically test your system, inspect hidden wiring or confirm that an installation is safe.
Common causes including inverter problems, FIT meter issues, dirt, wiring and installation faults.
Solar generation guide →Error-code guidance and professional diagnosis for legacy and modern solar PV inverters.
Inverter fault guide →Professional testing, inspection, inverter replacement, battery diagnostics and system takeover.
Repair support →Ongoing support, servicing and membership options for suitable orphaned solar and battery systems.
Rescue Service →Mr Solar provides professional solar PV and battery testing, inspection and repairs across Norfolk and Suffolk, including systems originally installed by other companies.




Send the details directly to our team and include as much information about the system or fault as possible.
Gorleston: 01493 289118
Norwich: 01603 394104
Keep your existing Contact Form 7 form here.
We can often narrow down the likely cause from the symptoms, fault code, monitoring screenshots and equipment details, but some faults require electrical testing or an engineer on site before a diagnosis can be confirmed.
Only follow the manufacturer’s published user restart procedure. Do not open the inverter or disconnect solar DC connectors.
Yes. Yes. We provide professional repair and Rescue support for suitable systems installed by other companies as well as our own installations.
Yes. We can explain general FIT, generation-meter and export issues. Specific metering or compliance questions may require us to review your system paperwork.
The inverter or battery make/model, exact fault code, postcode, when the issue started and what the monitoring app is showing are all helpful.
Send your question to our Norfolk team for guidance, or book professional support when the problem needs testing or an on-site visit.
There are a few reasons why your solar inverter might not be working. Here are some of the most common causes:
If you think your solar inverter might not be working, there are a few things you can do to troubleshoot the problem. First, check to see if there is a power outage. If there is, you will need to wait for the power to come back on before you can troubleshoot the inverter.

If there is no power outage, you can check the wiring between your solar panels and your inverter. Make sure that all of the connections are tight and that there are no damaged wires. You can also try resetting the inverter by turning it off and then back on again.
If you have checked the wiring and reset the inverter and it is still not working, you may need to call a solar technician to diagnose the problem. The technician will be able to check the inverter for any faults and make repairs if necessary.
Here are some tips to help you prevent your solar inverter from not working:
By following these tips, you can help to keep your solar inverter working properly and avoid any problems, If for some reason you may need our help as we are the best solar panel installers in Norwich please use the contact form below and some will be in touch about how we can help you.
Solar Photovoltaic cells are often advertised as an investment that saves you money in the medium/ long run. Let’s consider a a house in East Anglia, The average home electricity power use is;

2,900 kWh per year, priced at 28.34p Per KWH, £822 Per year electricity charge for metered electricity. (According to OFGEM)
Now, the house has a standard concrete roof, tiled, facing South, no Shading, standard
4.0kw (11 Solar Panels) generating 3,600kwh Electric per year;
2,900 kwh (we will use electricity per year )x 28.34p = £821 Per Year
4.kw Solar PV cost £4,995, pay back 6 years + Added re-sale value to the property + added protection of future increases in electricity costs.
If you have fixed your tariff until 2023 in favour of potential future savings as energy sky rockets in price, the maths looks like this,
2,900 kwh per year x 40.0p = £1,160 cost of 4.kw Solar PV £4,995 pay back 4.3 years pay back + Added re-sale value to the property + added protection of future increases in electricity costs.
we can add electricity storage systems, divert solar energy to the hot water emersion if you have a tank for hot water. The above is a simple example and reflects good conditions, so tell us about your situation and we will do the maths for you to check.
You can do some sums on our free Solar PV Calculator
A calculator is a useful starting point, but a credible result needs roof direction, pitch, shading, usable dimensions and local solar data — not simply a postcode and panel count.
Chimneys, roof windows, ridges, edges and access zones reduce the number of modules that can actually be fitted.
South is not mandatory. East and west arrays can perform well and spread output more evenly through the day.
Trees, neighbouring roofs, chimneys and aerials can affect individual modules and the inverter design.
Temperature, cables, inverter conversion, dirt, mismatch and downtime mean annual AC energy is not simply panel wattage multiplied by sunshine hours.

A 5kWp array is the combined laboratory-rated peak power of its modules. Annual generation is measured in kilowatt-hours and varies with the location and roof.
For example, ten 500W panels equal 5.0kWp, while twelve 450W panels equal 5.4kWp. The larger array will not necessarily deliver the best household value if much of its output is unused or the roof has different shading.
No. Savings also depend on electricity use, tariff, export rate, battery behaviour and future energy prices.
Use the exact input requested. Array size in kWp is panel wattage multiplied by panel quantity and divided by 1,000.
Orientation, pitch, shade, local weather, inverter design and downtime can all differ.
Tell Mr Solar about your property, electricity use and future plans. We will recommend a system around the building and the way you actually use energy.
The amount of electricity that a solar panel produces depends on the amount of light it receives. Solar panels work best in direct sunlight, but they can also produce some good electricity on cloudy days. 
Solar panels are a clean and renewable source of energy. They do not produce any emissions, so they are good for the environment. Solar panels are also a relatively affordable way to generate electricity.
Here is a more detailed explanation of how solar panels work:
Solar panels are made up of many photovoltaic cells. These cells are connected together in series, which means that the current from each cell flows into the next cell. This creates a larger current that can be used to power appliances or to feed into the electricity grid.
Solar panels are a great way to reduce your reliance on fossil fuels and to help the environment. If you are considering installing solar panels, there are a few things you should keep in mind:
If you are interested in learning more about solar panels, there are many resources available online and at your local library. You can also talk to a solar installer to get more information about your specific needs.
“Our trained solar experts will be happy to assist you with your decision to go solar.“
Mr Solar
- The Manufacture of the solar panel. We recommend brands like Canadian Solar & TRINA SOLAR, however there are some very good options for the cost.
- Solar Panel Cost. This is tricky to navigate as some of the cheaper panels may give better results when combined with the right inverter or other technologies
- Solar Panel Quality. Quality panels are backed by great warranties on solar energy production
- Energy Efficiency. this is a score, but if combined with the wrong inverter or failing to account for shading will seriously affect the production of electricity
- Temperature Coefficient. this is a range of temperature where the panels work best, some panels may not do so well in hot climates
- Durability.
- Size, colour, depth all need considering
- Types of Solar Cells Used, polycrystalline, monocrystalline and thin-film
What are the Benefits of Going Solar?
If you are looking for a way to save money, reduce your environmental impact, and invest in a sustainable future, solar panels are a great option.
How It Works
A lot will depend on two factors, outlay money and your energy usage. The cost of Solar Panels has come down dramatically over the last 10 years so looking for an affordable package is quite easy compared to the early days of the feed in tariff which saw 4kw been sold for £18,995. We now do 4kw Solar pv systems for under £4,995 as a installed and commissioned system with options to upgrade with electricity battery storage.
Electricity consumption, the following figures apply: Low consumption is estimated as being between 1,800kWh and 2,400kWh. Medium consumption at 2,900kWh to 4,200kWh. High consumption is between 4,300kWh and 7,100kWh per year. We will need to check your bills if you don’t know and work out the best system for your needs.
Mr Solar We will provide a detailed proposal taking into account all the areas where we can see to reduce your energy consummation and reduce your bills.
The number of solar panels you need will depend on a number of factors, including:
A solar panel’s wattage rating tells you how much electricity it can generate under ideal conditions. To calculate how many solar panels you need, you can divide your annual electricity usage by the wattage rating of the solar panels you are considering.
For example, if your annual electricity usage is 10,000 kWh and you are considering solar panels with a wattage rating of 300 watts, you would need about 33 solar panels.
However, it is important to note that ideal conditions are rarely met. The amount of sunlight your roof receives will vary depending on your location, the time of year, and the weather. You may need more solar panels than the calculation above suggests to generate enough electricity to meet your needs.
It is also important to consider the efficiency of the solar panels you choose. More efficient solar panels will generate more electricity per watt, so you may need fewer of them.
If you are serious about installing solar panels, I recommend getting a quote from Mr solar. They can help you assess your needs and recommend the right number of solar panels for your home.
Here are some additional things to keep in mind when calculating how many solar panels you need:
Solar PV panels, also known as photovoltaic or PV panels, will last more than 25 years. In fact, many solar panels installed as early as the 80s are still working at expected capacity. Not only are solar panels remarkably reliable, solar panel durability and efficiency has increased dramatically over the last 20 years.
We now see power outputs up to 600kw per solar pv panels. In the early days most were limited to 250kw. With the development of technology solar is now the most affordable type of energy for the home.
The industry standard for the lifespan of solar panels is 25 to 30 years. However, a solar panel won’t die after 25-30 years – rather, its power output will decrease a significant amount below what the manufacturer projected.
The amount of power output loss over time is called the degradation rate. The median solar panel degradation rate is about 0.5%-1.5%, which simply means that a solar panel’s energy production will decrease at a rate of 0.5% per year. So, after 20 years, your panels should still be working at about 90% of its original output.
There are a few factors that can affect the lifespan of solar panels, such as:
Overall, solar panels are a very durable and long-lasting investment. They can generate clean energy for decades, helping you save money on your electricity bills and reduce your environmental impact.
Here are some additional things to keep in mind about the lifespan of solar panels:
If you are considering installing solar panels, it is important to factor in the lifespan of the panels into your decision. Solar panels can be a great way to save money on your electricity bills and reduce your environmental impact, and they can last for many years.