Up to 20% off your electricity bill

Save up to 20%
on your electricity bill

We look at your actual bill: potencia contratada (contracted power), time bands, grid charges and the tariff you are on. We tell you whether you are paying too much and what is worth changing. No building work and no changes to your installation.

Typical saving: between 15% and 20%

Includes

Analysis of your bill

Switching supplier

Adjusting your contracted power

Up to 20% off your electricity bill

Save up to 20%
on your electricity bill

We look at your actual bill: potencia contratada (contracted power), time bands, grid charges and the tariff you are on. We tell you whether you are paying too much and what is worth changing. No building work and no changes to your installation.

Typical saving: between 15% and 20%

Includes

Analysis of your bill

Switching supplier

Adjusting your contracted power

Resources

English

Cut your bill first.
The panels after.

Rated 5.0

Costa del Sol · free review

Free analysis

No tie-in period

Switching with no loss of supply

Client reading through their solar installation quote

You are paying too much and your bill does not tell you

In most of the bills we review there is surplus contracted power or a tariff that does not match real consumption. The bill gives you a total, never the reason behind it.

Group of people chatting outdoors at a neighbourhood gathering

Too much power

Most homes have more contracted power than they use. You pay for it every month, come rain or shine, and hardly anyone ever checks it.

Person checking their panels' generation on a phone

A tariff that does not fit

There are time-band tariffs and flat tariffs. If yours does not match the hours when you actually use energy, you pay more every month without realising.

Single-storey house with a garden and porch in Marbella

Charges you do not need

Maintenance plans you never asked for, add-on insurance, assistance services. Small lines that add up over the year.

How we do it

Technician analysing electricity consumption data

We review your bill.
Free.

You send us a recent bill. We look at contracted power, tariff, hourly consumption and add-on charges, and we tell you how much it can come down without touching anything in your home. No obligation.

Villa lit up at night beside the pool

We switch your tariff.
No power cut.

We handle the switch of supplier from start to finish. There is no loss of supply, nothing to do to your meter and nothing changes at home: only next month's bill goes down.

Family enjoying their home powered by solar energy

We fit the panels.
If it adds up.

With your real consumption already measured, we size the solar installation that genuinely suits you. If the numbers do not work, we say so: we would rather lose a sale than sell you more than you need.

Installer carrying a solar panel onto a flat roof

And we stay on it.
Every year.

Tariffs change and so does your consumption. We review your bill once a year so you never overpay again, and if anything goes wrong with the installation, we are the ones who answer.

The bill first. And if panels are right for you, these are the real numbers for an installation on the Costa del Sol.

System cost

€4,000–14,000

The usual market range for a turnkey residential installation on the Costa del Sol, before grants and tax deductions.

Payback

5-7 years

The usual payback period without a battery on the Costa del Sol, and faster still with the IRPF (Spanish income tax) deduction and municipal tax reductions.

Self-consumption

85%

Average annual self-consumption of a properly sized Sun System installation with a battery. Without a battery it usually sits between 50% and 70%.

Total savings

€32,000

Net savings over 25 years, allowing for equipment degradation and battery cycles, and assuming no rise in electricity prices: if prices rise, you save more.

Guide · Your bill

Your electricity bill, line by line

Tap each item to see what it is, whether it can be negotiated and where people usually overpay. It’s a typical Spanish household bill (2.0TD tariff) with usual 2026 prices.

Example supplier

Electricity bill

Amount due

€91.91

Billing period
01/09 – 30/09/2026
Tariff
2.0TD · fixed price
Contracted power
P1 5.75 kW · P2 5.75 kW
CUPS
ES0031 •••• •••• 0F
01 / 06

The kilowatts you can use at the same time. You pay for it every day of the month, even when you’re away.

● Yes, it can be lowered

Where people overpay

Many homes have more power than they use. Getting it right can save around €30–⁠45 a year for each spare kW.

Check this on my bill
Total€91.91

Does your bill look different? Every supplier lays it out its own way, but the items are always the same.

Do it yourself

5 things you can check today

01

Too much power?

If your power never trips, you’re probably paying for kW you don’t use.

02

Fixed or indexed?

If your kWh price changes every month, you’re at the mercy of the market.

03

Paying for unused services?

Maintenance plans and insurance added at signing that nobody removed.

04

When do you use power?

If most of it is at peak times, a time-of-use tariff penalises you.

05

Has your discount ended?

First-year promotions disappear without warning.

Not sure? Send us your bill and we’ll check it for you, free.

Send my bill

Free review

Send us your bill. We’ll explain it within 24 h.

  • Your bill explained, line by line and in your language.
  • The tariff that fits best with your real usage, and how much you’d save.
  • Whether solar panels pay off, with an estimated saving.
★ 5.0 on GoogleLocal team · EsteponaNo obligation
Drag your bill here or click to choose itPDF, JPG or phone photo · max. 10 MB

What would you like to know?

We’ll reply in

Prefer WhatsApp? Send it to +34 744 716 950

How it actually works

Aerial view of a residential development on the Costa del Sol
01

Analyse

We look at your real consumption, not estimates. How much you use, when you use it and where the energy goes.

02

Design

03

Install

04

Monitor

01

Analyse

We look at your real consumption, not estimates. How much you use, when you use it and where the energy goes.

02

Design

03

Install

04

Monitor

FAQs
Lo que más nos preguntan

How much can I really save?

Most people cut their bill by between 40% and 70%. The exact figure depends on your home, your consumption and the size of the system, but we always work through realistic scenarios before installing so you know what to expect.

What happens if there is a power cut?
How long does the installation take?
Is it worth it if I might move?
Am I still dependent on the grid?
What maintenance does it need?

Not sure where to start?

Start with your bill. We review it, work out how much you could save and tell you honestly whether it is worth it or not.

Work out what you would save

Geometric pattern inspired by installation design
124,8

kWh of solar production

8.4 h

Work out what you would save

Geometric pattern inspired by installation design
124,8

kWh of solar production

8.4 h
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Green Sun System S.L.

Sun System is a solar installation company working in Marbella, Estepona and across the Costa del Sol, with an office in Estepona. We design, install and maintain photovoltaic systems, batteries and electric car chargers for villas and homes throughout the area. We work with leading brands in the sector and every project is sized around the home's real consumption, with a warranty on both the equipment and the installation. All rights reserved.

Sun System

Rated 5.0 on Google · 22 reviews