Is solar energy worth it? We answer your questions

Before answering that, we need to give a bit more context on how solar energy works in Costa Rica. This matters because every grid-tied system has to be reported to the power company that serves the area (ICE, CNFL, Coopeguanacaste, etc.). That means meeting all the standards and procedures the companies require, such as plans, inspections and, in some cases, a bidirectional meter, among other requirements.

Solar energy regulations in Costa Rica

One way the power companies regulate solar systems is that they're required to let users export to the grid, per circuit, up to 15% of each circuit's total capacity. By circuits, we mean the specific zones the grid is divided into, such as neighborhoods or regions.

Another form of regulation is that the company decides how much each user can export to the grid. This includes homes, shops, industries or any person or company connected to the grid with an electricity meter. Each person or company that decides to generate their own electricity takes up part of that 15% of the circuit's total capacity.

These factors, together with uncompetitive rates and caps on total generation, make installing solar panels (and exporting to the grid so the company credits that energy) unappealing. Because of this, most people who install solar choose zero-export systems and self-consumption systems with batteries. That way they store their surplus in batteries and use that energy when there's little sun or at night.

How much can I really save on my electric bill?

Savings depend directly on whether the system includes batteries. Even so, the percentage usually falls between 70% and 95%. It's worth noting that there are currently financing options with preferential rates, designed specifically to promote renewable energy projects. This makes the technology easier to access.

If I have solar panels, will I always have power?

This is one of the most common myths. A grid-tied solar system needs to receive a signal from the power company in order to work. It's a safety measure: if there's a fault and crews are working on the lines, the system has to stop sending power to prevent accidents. So if the grid goes down, you'll be left without power, even if the sun is out.

The solution: hybrid systems with batteries can act as backup during outages. They're usually set up to back up "critical loads" such as the refrigerator, lighting and internet. It's technically possible to back up the whole house if you want to, though.

How long does it take to pay back the investment?

The return on investment (ROI) varies. At EcoVolt, we recommend an electric bill of at least $200 a month for a project to be highly profitable. Under those conditions, the payback period is usually between 3 and 5 years.

Are there tax benefits or subsidies for installing panels?

Yes. Law 7447 provides tax exemptions for key components such as solar panels, inverters and batteries. These benefits go to the end user, which significantly lowers the upfront cost of the system.

What happens to my power on cloudy days or at night?

Today's solar panels are very efficient and produce energy even on cloudy days, though less than on a clear day. At night, production drops to zero. This is where systems with batteries make the difference: they store the surplus generated during the day for use at night, so you don't draw from the grid.

How many solar panels do I need for my home or business?

There's no one-size-fits-all answer; it depends entirely on your monthly use in kWh. Ideally, a technical study is done based on your electric bill or, in more complex cases, an energy analyzer is installed to measure your actual consumption habits.

Do I need to replace all the wiring in my house?

Usually not, as long as your current electrical installation is in good condition and meets safety standards. However, if very old or deteriorated wiring is found, it will need to be fixed to keep both the system and the house safe.

How long do solar panels last?

Current technology offers a service life of 25 to 30 years. In fact, most manufacturers offer power output warranties covering that same period.

What kind of maintenance is needed?

Maintenance is simple. One or two visits a year are recommended to clean the panels and inverters, plus a preventive check of all electrical connections.

Do I need permits?

If the system will be grid-tied, you're required to complete all the paperwork with the power company (ICE, CNFL, Coopeguanacaste, etc.). This includes plans, inspections and, in some cases, installing a bidirectional meter.

Important note: in Costa Rica, power companies cap grid export at 15% of the circuit's capacity. Because of this, and because the rates paid for exported energy aren't always competitive, at EcoVolt we usually recommend zero-export systems with batteries to make the most of your energy without depending on the utilities' limits.

Final thoughts on solar energy in Costa Rica

Solar energy is a viable, sustainable option. Despite the regulations and limitations, the benefits are clear. With advances in technology and financing options, more and more people and businesses are choosing it. If you're thinking about making the switch to solar, make sure you get good information and weigh your options. And remember, at EcoVolt we're here to help you find the best energy solution for you.