How the 2026 REWS solar grant actually works in Malta

What the 2026 REWS scheme actually is

The REWS (Regulator for Energy and Water Services) is the Maltese authority that regulates electricity, water, and renewable energy. Once or twice a year it opens a grant scheme for residential solar installations. The 2026 edition — formally Call 2026/RES, published in Government Gazette No. 21,625 of 17 April 2026, Notice 597 — runs from 20 April to 30 November 2026, subject to funding availability.

The scheme splits into three distinct options, and you need to know which one applies to you before you even call an installer:

• Option A — new photovoltaic system with a hybrid inverter (for homeowners who don't have solar yet, or who are replacing an old non-hybrid inverter)
• Option B — retrofit hybrid inverter for an existing PV system that has been grid-connected for at least six years
• Option C — standalone or add-on battery storage (stackable on top of Option A in a single application)

Each option has its own grant rate, its own cap structure, and — crucially — its own eligibility conditions. Getting the wrong one means leaving money on the table or, worse, submitting a claim that REWS rejects outright.

Option A — new PV install with hybrid inverter

Option A covers the installation of a new solar PV system paired with a hybrid inverter. The grant rate is 65% of eligible cost, capped at the lower of €3,000 per system or €645 per kWp (kilowatt-peak) of installed capacity. That two-cap structure matters: the per-kWp cap tends to bite on smaller systems, while the flat €3,000 ceiling bites on larger ones.

Work through a 4 kWp example. The kWp cap gives you €645 × 4 = €2,580. If your system costs €5,200 installed, 65% of that would be €3,380 — but €3,380 exceeds both the kWp cap (€2,580) and the flat cap (€3,000). Your actual Option A grant is therefore €2,580. A system priced at €4,000 would yield 65% = €2,600, which is still above the kWp cap, so you'd still get €2,580. The kWp cap is almost always the binding constraint on a 4 kWp system.

The hybrid inverter requirement is non-negotiable under Option A. A standard string inverter doesn't qualify. This matters because hybrid inverters cost €500–€900 more than standard ones, so factor that into your comparison when an installer offers you a "cheaper" quote with a string inverter — the grant difference almost always swings it back toward hybrid.

You can model your roof, bill, and system size against the 2026 REWS math in the Solar ROI Calculator to see how the caps interact at your specific kWp. The calculator also compares this grant route against the no-grant 15c/kWh alternative, which can be the better deal for systems without a battery.

Option C — battery storage

Option C covers battery storage, whether standalone or added to an existing or new PV system. The grant rate is 75% of eligible cost, capped at the lower of €6,000 per system or €600 per kWh of usable storage. Both the rate and the cap are more generous than Option A because batteries are the harder part of the economics to justify on their own merits.

The critical detail: Option C is stackable on Option A. If you're installing new panels and a battery in the same cycle, you submit one application and claim both. You don't have to choose.

Take a 6 kWh battery as an example. The kWh cap gives €600 × 6 = €3,600. If the battery costs €5,000 installed, 75% = €3,750 — above the kWp cap, so your grant is €3,600. Combined with the Option A example above (€2,580), a 4 kWp + 6 kWh system in a single application yields €2,580 + €3,600 = €6,180 in REWS grants before the NZIA bonus.

Battery payback is slower than panel payback, and the direct calculation often looks unexciting. But batteries change the self-consumption ratio dramatically — and self-consumed energy is worth more than exported energy at almost every ARMS tariff band. Run your electricity bill through the Solar ROI Calculator to see whether adding a battery actually changes your net-present-value over 25 years, not just your upfront cost.

Option B — retrofit for existing PV

Option B is for homeowners who already have PV panels and whose system has been grid-connected for at least six years. The six-year clock runs from the official grid-connection date — not the invoice date, not the installation date. If you're not sure of your date, check the letter from Enemalta or the DSO (distribution system operator) that confirmed your meter swap.

Option B itself splits into two sub-grants:

• Hybrid inverter sub-grant: 75% of eligible cost, capped at the lower of €1,800 or €350 per kWp of your existing system capacity
• Battery sub-grant: 75% of eligible cost, capped at the lower of €6,000 or €600 per kWh — identical terms to Option C

There is no grant on new panels under Option B. The assumption is that your panels are still producing adequately; what you're upgrading is the inverter (to unlock hybrid/battery capability) and optionally adding storage. If your panels are degraded and you want to replace them, you'd need to consider whether Option A is a better fit — but Option A requires the full system to be new.

The use case for Option B is compelling for anyone whose original 20-year feed-in tariff contract is entering its final years or has already expired. When your FIT income drops away, self-consumption economics take over. A hybrid inverter upgrade under Option B, combined with a battery, can dramatically improve the financial picture without the capital outlay of a full system replacement.

But run the numbers before you commit — a battery retrofit is not automatically a good deal. If you are still on an active 10c5/kWh feed-in tariff, the payback can be surprisingly long. The hybrid inverter has to be sized to your whole existing array, and the Option B inverter sub-grant is capped at €1,800 (or €350/kWp), so on a typical 5 kWp system you still self-fund roughly €1,750 of the inverter plus the un-grant-covered slice of the battery — about €2,650 net all-in. Against that, the battery's only job is to convert exported kWh (worth 10c5 under the grant FIT) into self-consumed kWh worth your marginal ARMS band. Because your existing panels already displace the expensive top-band consumption, that extra self-consumption is valued at a lower band — so on a modest bill the annual gain can be just tens of euros, pushing payback past 25 years. The retrofit turns clearly profitable when (a) your bill is high enough to keep the marginal saving in Band 4–5, (b) your original FIT has already expired so there is no export income to give up, or (c) you forgo the grant and re-elect the 15c no-grant tariff — valid for Option B applicants precisely because they have no active FIT. The calculator's "I already have solar" tab compares all three against your real bill, so you see the actual payback before an installer quotes you.

The +5% NZIA bonus

The NZIA (Net-Zero Industry Act) is an EU regulation designed to encourage domestic manufacturing of clean energy equipment. Under the 2026 REWS scheme, equipment certified as meeting NZIA criteria earns you an additional 5 percentage points on your grant — on top of the already-capped amount, not on top of the rate.

In practice: if your Option A grant comes out at the €3,000 cap, the NZIA bonus adds €150, giving you €3,150 total. If your combined Option A + Option C grant is €6,180 (the example above), NZIA adds €309, giving €6,489.

Most Maltese installers carry at least one NZIA-eligible inverter line specifically because this bonus is now a meaningful differentiator in competitive quotes. But you must confirm NZIA eligibility before signing the contract — the installer should be able to provide the relevant certification. Don't assume: some popular inverter brands are not yet NZIA-listed, and substituting them at the last minute can delay your application.

The NZIA bonus also applies to Option B's hybrid inverter sub-grant. If your retrofit hybrid inverter qualifies, you get the 5% uplift on that portion too.

How the maths interacts with the ARMS tariff and the feed-in tariff

The grant reduces your upfront cost, but your long-term return depends on two other numbers: the ARMS tariff you pay for grid electricity you don't self-consume, and the FIT (feed-in tariff) you earn for energy you export.

The ARMS residential tariff operates on a five-band structure. Band 1 (low-consumption households) pays roughly €0.1047/kWh; Band 5 (heavy users) pays €0.6076/kWh. The savings from every kWh you self-consume instead of buying from the grid are worth between €0.13 and €0.61 depending on which band your consumption falls in. Heavy users — air conditioning, electric vehicles, electric water heaters — get disproportionately better returns from solar because they're displacing expensive Band 4 and Band 5 units.

Energy you export earns 10c5/kWh (€0.105) for 20 years, fixed at the rate in your FIT election letter at the point of grid connection. That rate is below even Band 1 import prices, which means self-consumed energy is nearly always worth more than exported energy. This is why batteries help the economics even when their direct payback is slow: they shift export to self-consumption, and that gap — between €0.105 earned per exported kWh and €0.20–€0.60 saved per self-consumed kWh — compounds over 20 years. (A separate scheme offers 15c/kWh instead of the grant — see the no-grant alternative below for when that flips the maths.)

The Solar ROI Calculator walks your electricity bill through the ARMS band structure, applies the 2026 REWS grant caps automatically, and gives you a net-present-value figure that accounts for both the FIT income and the self-consumption savings together.

Worked example — a typical 4-bedroom Malta home

A four-bedroom home in Malta typically uses 6,000–8,000 kWh per year. For a household at the upper end of that range, a 4 kWp PV system paired with a 6 kWh battery is a commonly recommended configuration. Here's how the numbers look under the 2026 REWS scheme:

At a net cost of roughly €3,700–€4,000 (costs vary by installer), a household displacing 5,000 kWh per year from the grid at an average Band 3–4 tariff can expect a payback period of five to seven years. The 25-year net benefit — accounting for panel degradation, FIT income, and avoided grid bills — typically lands between €15,000 and €22,000, depending on consumption pattern and future tariff movements.

Those are directional figures. Your roof orientation, shading, annual bill, and installer quote all move the needle. Model your roof and electricity bill against the 2026 REWS scheme in the Solar ROI Calculator — it will give you a personalised payback curve and NPV figure, not a rounded estimate.

The no-grant alternative — 15c/kWh feed-in tariff

Malta runs a parallel scheme that swaps the upfront REWS grant for a higher feed-in tariff. Under Legal Notice 101 of 2026 (amending the Feed-in Tariffs Scheme Regulations, S.L.545.27), residential systems between 1 kWp and 40 kWp can elect 15c/kWh for 20 years on exported energy — versus the grant route's 10c5/kWh for 20 years. The two routes are mutually exclusive: you pick one at the time of grid connection, and you cannot switch later.

The arithmetic is straightforward. The no-grant route gives up roughly €2,580 of upfront subsidy on a 4 kWp install in exchange for an extra 4.5c on every exported kWh for 20 years. Whether that's a good trade depends entirely on how much energy you export — and that's largely driven by whether you fit a battery.

When the no-grant route wins. A 4 kWp system generating ~6,400 kWh/year with no battery typically exports about 70% of generation — around 4,480 kWh/year. The 4.5c FIT premium on that volume earns roughly €202/year extra, or about €4,000 over the 20-year fixed term. That's around €1,400 better than taking the €2,580 grant. The winning profile: small household relative to roof size, no battery, low daytime occupancy.

When the grant route wins. Add a 6 kWh battery and self-consumption climbs to ~75%; exports collapse to ~1,600 kWh/year. The 4.5c premium on that volume earns ~€1,440 over 20 years — but Option C now stacks ~€3,600 in battery grant on top of Option A's ~€2,580, totalling €6,180 of upfront subsidy. The grant route wins decisively for any household fitting a battery.

The capacity cap to know. The 15c scheme is capped at a national 12.8 GWh / 8 MWp per annum, first-come-first-served (Schedule 2 of S.L.545.27). Once the cap is exhausted, only the 10c5 grant route remains. Before you make a final decision, ask your installer to confirm with REWS that the no-grant allocation is still open for the current year.

The Solar ROI Calculator computes both routes side-by-side and highlights whichever has the better 25-year net benefit for your specific inputs — toggle the battery slider and watch the recommendation move.

Common gotchas

Funding is finite. The scheme runs to 30 November 2026 "subject to funding availability" — that qualifier matters. Previous REWS rounds closed ahead of the calendar deadline when the allocation ran out. If you're planning to install, applying early in the window reduces the risk of being caught out.

The "€/Wp" wording in the published notice. The Government Gazette text in places uses "€/Wp" (watts-peak) where context clearly means "€/kWp" (kilowatts-peak). €645 per Wp would be an absurdly large number; €645 per kWp is consistent with grant structures in previous REWS rounds. Treat it as kWp. Your installer will know this, but it's worth flagging if you're reading the original notice yourself.

The net-meter swap takes time. After installation, Enemalta needs to swap your meter for a bidirectional one before your system can legally export. That process typically takes four to eight weeks from application. Your panels generate from day one, but any surplus simply isn't metered until the swap completes — you can't claim FIT income for that period retroactively.

The six-year clock for Option B. It runs from grid-connection date, not invoice date or installation date. Some homeowners who installed in late 2019 or early 2020 and assume they qualify for Option B in 2026 may fall short by weeks. Check your Enemalta grid-connection confirmation letter before briefing an installer on Option B.

No retroactive claims. If you installed before the scheme opened (20 April 2026) you cannot claim under Call 2026/RES, even if work was completed days before the opening date. REWS is strict on this — the scheme specifically covers systems installed during the open window.

If cashflow is the constraint rather than the grant itself, it's worth knowing that some Maltese banks offer green personal loan products at preferential rates for energy improvements — see whether a green-loan add-on changes your borrowing position before ruling out the battery.

What this means for you

The 2026 REWS scheme is genuinely generous by EU standards — a net cost of under €4,000 for a 4 kWp + 6 kWh system is hard to achieve in most other European markets. But the three-option structure, the dual-cap maths, and the eligibility conditions mean it rewards preparation. Get your grid-connection date, know your annual kWh consumption, and confirm your preferred inverter's NZIA status before you start collecting installer quotes.

The Solar ROI Calculator builds in the 2026 REWS grant caps, the +5% NZIA bonus, and the full ARMS five-band tariff walk. Plug in your roof size, your current electricity bill, and whether you want a battery — it will tell you your personalised grant, your net cost, and your expected payback period in one step. That's the number you need before any installer conversation.