What Happens After Solar Panels Are Installed?

Your System Starts Generating from Day One

Once your solar panel installation is complete and the inverter is switched on, your system starts generating electricity immediately. There is no waiting period. From the moment the panels are live, any electricity they produce is used by your home first, reducing what you draw from the grid.

But there are a few admin steps that happen in the background. Here is exactly what to expect in the days and weeks after installation.

Step 1: MCS Certificate Issued

Your installer issues an MCS (Microgeneration Certification Scheme) certificate within a few days of completion. This is your proof that the system was installed to the required standard by a certified company.

The MCS certificate is important because:

• You need it to apply for the Smart Export Guarantee (SEG)
• It is required for any warranty claims
• It confirms the system is compliant with building regulations and electrical standards
• It adds value if you sell your home

Keep this document safe. Your installer should also register the installation on the MCS database, which you can verify online.

Step 2: DNO Notification

Your installer notifies the local Distribution Network Operator (DNO) that a solar system has been connected to the grid. In Milton Keynes, that is typically UK Power Networks. This is a legal requirement handled entirely by your installer — you do not need to do anything.

In 2026, there is no wait for a meter change or export meter installation. Smart meters already track imports and exports automatically, so your system is fully operational straight away.

Step 3: Monitoring App Setup

Most modern inverters (SolarEdge, GivEnergy, Huawei, Fox ESS) come with a monitoring app. Your installer should set this up before they leave, or provide login details so you can do it yourself.

The app shows you:

• Real-time generation — how many watts your panels are producing right now
• Daily, weekly, and monthly totals — how much electricity you have generated
• Self-consumption vs export — how much you used at home vs sent to the grid
• System health — alerts if a panel or inverter has an issue

Check it regularly in the first few weeks. It helps you learn when your system produces the most and adjust your usage to match.

Step 4: Apply for the Smart Export Guarantee

The SEG pays you for every kWh of electricity you export to the grid. Rates vary by supplier but typically range from 7-15p per kWh. You need to apply with an energy supplier that offers an SEG tariff — it does not have to be your current supplier.

To apply, you will need:

• Your MCS certificate number
• Your MPAN (meter point administration number — on your electricity bill)
• Confirmation that you have a smart meter or export meter

The application takes 10-15 minutes online. Payments are usually made quarterly. For a 4kWp system exporting around 1,800 kWh per year, that is roughly £130-270 per year in export income.

Step 5: Adjust Your Energy Habits

The biggest savings come from using electricity when your panels are generating. Simple changes make a real difference:

• Run your washing machine, dishwasher, and tumble dryer during daylight hours
• If you have an EV charger, set it to charge midday when solar output peaks
• Use timers on your immersion heater to heat water during solar hours
• Consider adding a battery later to store surplus for evening use

Ongoing Maintenance

Solar panels need very little maintenance. Rain keeps them reasonably clean, and there are no moving parts to wear out. A few things to keep in mind:

• Annual check — A visual inspection of panels, cables, and the inverter once a year is good practice
• Panel cleaning — Only needed if you notice heavy soiling (bird droppings, tree sap, moss). Professional cleaning costs £50-100
• Inverter lifespan — String inverters typically last 10-15 years. Budget for a replacement around year 12-15. Microinverters last 20-25 years
• Panel warranty — Most panels carry a 25-year performance warranty guaranteeing at least 80% output at year 25

What to Do Now

If you are thinking about getting solar installed, use our free solar calculator to get a quick estimate of system size, cost, and savings for your home. It takes two minutes and shows you what to expect from day one onwards.

Frequently Asked Questions