Solar energy in Colombia: the outlook in 2026

That solar energy makes more sense in Colombia today than five years ago is not the consequence of a single change, but of three that happened in parallel and reinforce each other.

The first is the cost of the equipment. Photovoltaic modules and inverters have followed a sustained downward curve for more than a decade, driven by the scale of global manufacturing. That fall is not a Colombian phenomenon: it is what has allowed photovoltaics to go from a subsidised technology to competing on cost.

The second is the tariff. While the equipment got cheaper, the price of the energy you buy from the grid went up. That is the other side of the equation and it usually gets less attention: the return on an installation improves not only because the system costs less, but also because each kWh you stop buying is worth more.

The third is regulatory stability. A framework that changes every two years makes it impossible to assess a twenty-five-year investment. The settling of net metering and of the tax incentives, with known rules, reduces that regulatory risk, which is a cost even though it appears in no quote.

The net metering scheme is probably the most important conceptual change for a residential user, and also the worst explained.

A grid-connected system stores nothing. When it produces more than you consume at that instant, the surplus is exported to the grid; when it produces less, you take it back. The framework in force — CREG Resolution 174 of 2021, which replaced CREG 030 of 2018 — defines how that exchange is accounted for and offset for small-scale self-generators.

The practical consequence is that the grid works as a virtual backup, and that is why the vast majority of Colombian urban homes do not need batteries. Batteries solve a different problem: having power when the grid goes down.

There is a nuance worth being clear about from the start, because it changes the savings calculation: the energy you self-consume saves you the full tariff, whereas what you export is offset according to what the regulation sets, at a value that need not match that tariff. That is why two homes with the same system and identical consumption but different schedules save different amounts.

Law 1715 of 2014, amended by Law 2099 of 2021, establishes four mechanisms for non-conventional renewable generation projects: an income tax deduction on part of the investment, VAT exclusion on equipment and services, exemption from import duties on goods not produced in the country, and accelerated depreciation of the asset.

Decreto 829 de 2020 sets out the procedure: the benefits are granted on a project certified with UPME. They are not an automatic discount the installer applies to the invoice.

From that follows the part almost nobody explains: their value depends on your tax situation. A company with sufficient net taxable income can use the deduction across several periods; a household that does not file income tax gets nothing from that mechanism, although it can still benefit from the VAT exclusion applied to the project.

The practical consequence is twofold. If you are a company, involve your tax adviser in the assessment from the start, because the incentive can be a meaningful fraction of the return. And if you are a household, be wary of a proposal that presents the benefits already discounted from the price as though they were automatic.

Colombia has a particularity that works in favour of photovoltaics and that is usually summarised badly as 'there is a lot of sun'.

What matters is not maximum irradiation — there are deserts with more — but its stability. Because of the proximity to the equator, day length barely varies through the year and the sun stays high. That makes annual generation considerably more predictable than at latitudes with marked seasons, where a system produces a lot in summer and little in winter.

For anyone assessing an investment, predictability is worth as much as magnitude: it reduces the uncertainty in the financial model. And it has a concrete technical consequence, which is that roof orientation matters less than in other countries. A roof that would be ruled out in Europe on orientation grounds can be perfectly viable here.

What does vary a great deal within the country is regional irradiation. La Guajira and much of the Caribbean coast are clearly above average; areas of heavy cloud cover, below. That variation is why an estimated saving that does not say which region it refers to is an empty number.

Solar energy is still an investment assessed case by case. The radiation in your area, your tariff, your stratum and your consumption pattern determine whether the payback is a few years or many.

Nor has it changed that a grid-connected system shuts down during an outage, for the safety of whoever is working on the line. If you need continuity, that is a separate decision, with its own cost, and it is justified by what being without power costs you, not by extra savings.

And the information asymmetry has not changed either. The typical buyer is assessing a technology they do not know, facing sellers who do, and a solar quote has enough variables — capacity, brand, warranties, scope, paperwork — for two proposals to look comparable without being so.

So be wary of headlines promising a fixed saving for everyone. The figure that matters is the one for your project, calculated on your bill.

If there is a brake on adoption in Colombia in 2026, it is neither the technology nor the financing. It is the spread of quality in the installer market.

The sector's growth has attracted serious companies and also operators that subcontract inexperienced labour, skip legalization with the grid operator, or size systems by what the customer wants to hear rather than by their real consumption. A poorly executed installation does not fail on day one: it fails in year three, when leaks appear in the roof or the inverter has been down for months without anyone noticing.

There are verifiable signals before signing. That the proposal states the brand and model of modules and inverter, not 'equivalent'. That it separates the module warranty, the inverter warranty and the installation warranty, which are three different things with different terms. That it explicitly includes processing the connection with the grid operator. And that the estimated annual output comes with its assumptions: the irradiation used and the performance ratio, not a bare figure.

RETIE is the other filter. The electrical installation has to comply with it and that is neither optional nor negotiable in exchange for a discount.

The first step is not to buy, but to understand. Gather your last twelve months of bills: the monthly average in kWh is the starting point of any serious sizing, and no proposal that does not ask for it deserves trust.

With that, a preliminary estimate gives you the order of magnitude — capacity, investment and payback as ranges — before you talk to anyone. It does not replace a quote, but it lets you spot a proposal that falls outside the range for no reason.

Then come the quotes. Ask for at least three, check that they cover the same scope and compare them on cost per installed kWp, not on the total: two proposals of different sizes are not comparable on their bottom line.

And before signing, check the legalization. It is the process that generates the most cost surprises when the proposal fails to mention it, and without it the system cannot come under the net metering scheme.