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Solar panels for your home: how to use AI to cut through the confusion and compare like for like

A lot of people are looking at solar panels now for a different reason than you might expect. It is rarely about getting the money back as fast as possible. It is about heading into retirement with a lower, more predictable energy bill — one less thing to worry about when you are trying to plan your costs for the years ahead.

I looked into a solar installation for my own home recently, and I will be honest: the amount of information out there is confusing. Almost everything I found was written to sell a system rather than to help me understand one. The numbers seemed to contradict each other, the terminology assumed I already knew what it meant, and every quote seemed to be for a slightly different combination of panels, inverters and batteries — which makes it very hard to tell whether one price is actually better than another, or just smaller.

This is exactly the kind of situation AI is well suited to. Not to make the decision for you, but to help you understand what you are actually being offered, work out what you need in the first place, and compare quotes on a level footing rather than by gut feeling.

A word before we start. This post explains how to use AI to understand the subject and organise your thinking — it is not financial advice, and rules around VAT, grants and export payments do change. For anything involving a significant amount of money, get quotes from more than one MCS-certified installer and check the current position for yourself before signing anything.

Why it feels so confusing

Solar quotes look inconsistent because they usually are. One installer might quote for ten panels rated at 380 watts each, another for twelve panels at 415 watts, with completely different inverter brands and sizes, and one of them might include a battery while the other only offers it as an optional extra. On the surface you are looking at two prices for "solar panels", but underneath you are comparing two genuinely different systems.

None of this is necessarily anyone trying to deceive you — the technology comes in a huge range of combinations, and every roof is a bit different. But it does mean the headline price on its own tells you very little, and that is where most of the confusion comes from.

Start by asking AI to explain the basics

Before comparing anything, it helps to understand a handful of terms that come up in every quote. AI is a patient way to get there, since you can ask the same thing worded five different ways until it actually clicks.

"Can you explain, in plain English, what kWp means when talking about solar panels, and how it's different from kWh?"

"What does a solar inverter actually do, and what's the difference between a string inverter and a hybrid inverter?"

"If I add a home battery to a solar system, what does that actually change about how my electricity is used and paid for?"

"What is the Smart Export Guarantee, and how does it work if my panels produce more electricity than I use?"

You do not need to become an expert. You just need enough of a working understanding that when a sales team uses these words, you know roughly what they mean and can ask a sensible follow-up question.

Work out what you actually need

The most useful thing you can do next is exactly what works for any big AI-assisted decision: describe your situation and ask AI to question you, rather than the other way round.

"I am considering solar panels for my home. Before you suggest anything, can you ask me some questions about my home, my electricity use and what I am hoping to get out of it?"

A good back-and-forth will usually end up covering things like: roughly how much electricity your household uses in a year, whether you are home during the day or out at work (which affects how much of the solar power you would actually use yourself versus export), which direction and angle your roof faces, whether there is any shading from trees or nearby buildings, whether you want a battery as well as panels, and what matters most to you — the lowest possible bill, protection from rising energy prices, some backup power during a cut, or all three.

Once AI has that picture, it can give you a realistic sense of the size of system that would actually suit your home, rather than the size a particular installer happens to have in stock that month.

A tick-list to take to every sales conversation

Every installer will present their own system as the sensible choice. Going in with the same list of questions for each one is the single best way to keep the comparison fair. You can ask AI to build this out around your own situation:

"Can you put together a tick-list of questions I should ask any solar installer before I decide, so I can compare their answers fairly against other quotes?"

At minimum, the list is worth including:

The total system size in kWp, the exact number of panels, the wattage of each one and the panel brand.
The inverter brand, type (string or hybrid) and its own separate warranty length — inverters typically fail before panels do.
Whether a battery is included or optional, its usable capacity in kWh, and its warranty.
Whether the installer and equipment are MCS-certified — this is what allows you to register for the Smart Export Guarantee and matters for any warranty claim.
Whether they are TrustMark registered, and what happens if there is a dispute — as of January 2026, complaints about installers who follow the Renewable Energy Consumer Code go through the independent Green Homes Dispute Resolution service, not the installer's own complaints team.
Who handles the paperwork — registering the system with your electricity network and setting you up with a Smart Export Guarantee tariff — and whether that is included in the price.
What the workmanship warranty covers, separately from the panel and inverter warranties.
What a realistic, rather than best-case, estimate of your annual saving looks like, and how they arrived at that figure.

Asking every sales team the exact same questions, in the exact same order, makes it far easier to spot who is being straightforward with you and who is glossing over something.

Comparing quotes like for like

Once you have two or three actual quotes, AI is genuinely useful for laying them side by side. Type or paste in the specifications from each one and ask something like:

"Here are three solar quotes I have received [paste in the details of each]. Can you compare them fairly, working out the price per kWp, and flag anywhere the specifications aren't directly comparable?"

"Based on these three quotes, which warranty terms are strongest, and is there anything unusual or worth questioning in any of them?"

"One of these quotes includes a battery and the other two don't. Can you help me work out roughly what a similar battery would add to the other two quotes, so I can compare all three properly?"

This will not replace doing your own homework, but it turns three confusing, differently-formatted quotes into one clear comparison — and it will happily point out anything that looks like an outlier, in either direction.

If you would like help turning any of this into a checklist or a clear message to send an installer, the Build a Great AI Prompt tool on this site can help you put one together.

On the numbers themselves

A few things are true at the time of writing, though it is always worth checking they still are: residential solar installations currently attract 0% VAT, a relief that is due to run until March 2027. The Smart Export Guarantee pays you for electricity your panels generate but you do not use — the rate varies considerably between suppliers, from a few pence per unit to considerably more, so it is worth asking AI to help you understand a supplier's SEG tariff alongside their installation quote. None of this is financial advice, and for a decision of this size it is worth checking the current schemes for yourself and, if you are at all unsure, getting independent advice before committing.

Going into it with a clear head

The point of all this is not to turn you into a solar engineer overnight. It is to walk into every conversation with a sales team already understanding what they are talking about, already knowing what questions matter, and already able to tell whether a quote genuinely compares well against another one — rather than simply trusting whichever salesperson explained things most confidently.

That is a more comfortable, and considerably less confusing, way to make a decision that is going to affect your bills for years to come.