How Much Can You Save with Solar Panels in 2025?

At Renovae Energy we get a key question every day: is it really worth installing solar panels? The answer is yes, but the savings depend on several factors such as your consumption, the size of the installation or your electricity tariff. In this article we show you how to calculate it and what results you can expect this year.

What do solar savings depend on?

Your annual electricity consumption: the higher it is, the more return you’ll get.
The size and orientation of your installation: they affect energy production.
Your contracted electricity tariff: it affects the value of the kWh you stop paying for.
Whether or not you have batteries: this affects your total self-consumption capacity.
Surplus compensation: it lets you recover money for the energy left over.

A practical savings example in 2025

Let’s take a home that consumes 4,500 kWh a year and contracts a 5 kW installation without a battery:

Estimated annual production: 7,000 kWh
Direct self-consumption: 30% (2,100 kWh)
Surplus compensation: 3,500 kWh x €0.08/kWh = €280
Estimated total savings: €210 (self-consumption) + €280 (compensation) = €490/year

In an average installation without a battery, savings can range between €400 and €700 a year, depending on usage. If a battery is added, these savings can rise to up to 70% of the annual bill.

What if electricity prices keep rising?

Then the savings will be even greater. One of the big benefits of installing solar panels is that you shield part of your consumption against future rises in the electricity market.

How long does it take to pay off the installation?

It will depend on the final price and the annual savings. But as a reference:

Installation without a battery: payback in 6 to 8 years
Installation with a battery: payback in 9 to 12 years

Remember that solar panels last more than 25 years, so you’ll have many years of net savings once the investment is recovered.

At Renovae Energy we help you calculate your real savings

Not all homes consume the same, nor do all installations generate the same. That’s why at Renovae Energy we carry out a free, personalised study so you can see, with concrete figures, what you can save based on your home, your roof and your habits.

Would you like to receive a proposal with your estimated savings? We’ll help you with no obligation.