Instant CALCULATION!
Could You Break Even on a Solar Installation in 3-5 Years?
The solar calculator below is the only one in Jávea and surroundings (that we know of) which estimates your break-even period – also called your “payback period”.
In 2-3 minute, you will find out:
- Your recommended system size
- Expected annual savings for the next 10 years
- Expected break-even period
- Estimated installation cost
Using the Solar Break-Even Calculator
You’ll need an electricity bill to use the solar break-even calculator.
Any electricity bill for your property dated within the last 6 months will let you use the calculator and generate an instant result.
PLEASE NOTE: This Solar Break Even Calculator does not factor in the cost of a solar battery. If you’d like a break even estimation including a solar battery, heat pump, car charger or any other appliances you can click here.
Solar Break Even Calculator ↓
FREQUENTLY ASKED QUESTIONS
How to Use the Solar Break-Even Calculator
How do I use the calculator?
There are two steps to the calculator.
Once you’ve entered the required information, you’ll need to click the yellow button. Your calculation results will now appear below.
Once you have completed Part 2 and seen your savings estimation, you can change the figures you have introduced and see your estimations change instantly.
How long does the calculator take?
There are 4 steps which should take no more than 1-3 minutes to answer.
The result is generated instantly.
What do I need to use the calculator?
You need a copy of your an electricity bill for your property in Spain to hand.
The Solar Break Even Calculator asks for your electricity consumption (in kWh) and bill amount (€).
This is calculate your current electricity costs (€/kWh) and produce a break even estimation result.
You will need a bill from the last 6 months.
What if my electricity consumption is low?
The calculator does not work for properties with an average electricity consumption under 450 kWh per month – or under roughly €90.
This is because the break-even or payback period is usually longer.
If your consumption is lower than 450 kWh and you’d still like a break-even estimation for your property, click here.
What if my my property is a new-build or new home?
The Solar Break Even Calculator uses your existing electricity consumption to calculate your break even.
It will not work if you have no electricity bill yet in your property.
If you still want a break even estimation for your new property in Spain you can click here.
Do I need to give my contact information?
No, you do not need to provide any contact information.
Anonymous usage data is stored in the calculator software, so we can periodically review submissions and improve the estimations – no data such as your IP address is ever stored, so nothing can be traced back to you.
How accurate is the Solar Break Even Calculator?
The Solar Break Even Calculator is the only one we know of in the Jávea area which calculates your break-even or payback period.
But there are more elements we have included to improve the accuracy:
- We use climate data for the Costa Blanca North to estimate the system size you need (in kW), based on average annual peak solar hours received by this region
- We use recent quotes in 2025 to estimate the installation cost for your recommended system size.
- We provide two savings results: one is your annual savings each year for the next 10 years, and the other is your accumulated annual savings over the next 10 years.
- We estimate your annual savings based on your current electricity costs (€/kWh) with your current provider – not including taxes and charges – and we factor in an inflation rate of 1.9% over the next 10 years.
- We account for a slight and normal decline in the output of your solar panels.
- We assume you will save no more than 80% of the solar produced by your system. We find with MiSolar clients that at least 20% of solar electricity produced is either not consumed, or sold to the grid for a lower price than it’s bought back.