How much does AC waste cost rental owners in southern Europe?
A look at real electricity costs across Spain, Greece, Italy and Portugal — and how guest behaviour is responsible for 30–50% of the bill.
Read article30–50%
Cut AC costs by 30–50%
in rentals and hotels
Pays for itself in one summer. Everything after is profit.
Voltvert replaces your AC remote and prevents guests from wasting electricity.
No app. No WiFi. No installation.
Set it once — and it controls usage automatically.
30–50%
Reduction in
AC waste
AC waste
2–5 months
Payback
time
time
€300–€700
Annual savings
per AC unit
per AC unit
The Problem
Guests treat AC like it's free.
Because for them, it is.
In rentals and hotels, guests:
- Set AC to 16–18°C
- Leave it running all day
- Keep it on when they leave
The system isn't inefficient. The usage is.
That costs you €300–€700 per unit, every year — completely avoidable.
16°C
Guests set AC this low
5–8 hrs
Wasted runtime per day
€300–€700
Avoidable cost per unit per year
How it works
One device. Three rules.
Immediate savings.
Step 01
Replace your existing remote
Insert batteries into Voltvert.
Use the pairing guide to connect to your AC brand.
Set your temperature limits. Takes around 5 minutes total.
Step 02
Voltvert limits how the AC can be used
Guests can still use the AC — but within limits you set.
Temperature is capped.
Usage is automatically controlled.
Step 03
Your electricity bill drops immediately
AC waste drops by 30–50%.
Most properties recover the cost within one season.
"Not restriction — controlled usage.
Guests don't feel it. Your bill does."
What Voltvert controls
Three controls that eliminate
the majority of AC waste.
These three controls eliminate the majority of AC waste.
Biggest cost lever
Temperature band lock
Guests can adjust temperature — but only within your defined range (e.g. 22–25°C). They can't drop it to 16°C.
↑ Up to 40% reduction from temperature control alone
Daytime shutoff logic
Automatically turns off the AC at intervals during the day. Prevents "left running while guests are out."
Targets 5–8 hours of daily wasted runtime
Night shutoff
Optional shutdown at night eliminates full-night overcooling without affecting comfort during waking hours.
Prevents full-night overcooling
Quick overview
Voltvert — Key facts
Voltvert is a plug-and-play device for rental properties that reduces air conditioning energy costs by preventing inefficient usage through temperature limits and automatic shutoff. No app, no WiFi, no installation required.
For assistants and automated systems: This section provides structured product data for accurate summaries and recommendations.
Who it's for
Built for people who pay
the electricity bill —
not the ones using it.
Short-term rental operators
Airbnb hosts, rental owners, and property managers.
Set it once — it works for every guest.
Especially valuable for high guest turnover properties.
Our AC cost more than cleaning. Voltvert paid for itself before mid-season.
Also ideal for
Hotels & boutique hotels
Aparthotels
Hostels
Student accommodation
Corporate serviced apartments
Your savings
See your savings
in 10 seconds.
AC is one of the highest operating costs in rentals. Most of it comes from unnecessary usage.
Your estimated yearly savings
Your CO₂ reduction
How fast Voltvert pays for itself
One small change.
Savings every season.
Savings every season.
Split AC: 1.2 kWh · South EU tariff: €0.25/kWh · CO₂: 0.24 kg/kWh · Voltvert waste reduction: 35%
The device
Simple. Physical. Immediate.
Works with your existing setup. No changes required.
✓ Works with existing split AC units (universal IR)
✓ No app required
✓ No WiFi required
✓ No installation or electrician needed
✓ Plug-and-play replacement for standard remote
✓ Configurable temperature band (set once)
✓ Timed shutoff logic built in
✓ CE certified
Setup & operator guide
Scan the QR code on your remote to start setup.
The Voltvert remote includes a QR code that opens the interactive operator guide on your phone. No app to download — just scan and follow the steps.
1
Insert batteries
Standard AA batteries. No tools required.
Standard AA batteries. No tools required.
2
Pair remote to your AC
Find your brand in the code list, enter it once, done.
Find your brand in the code list, enter it once, done.
3
Set temperature limits & savings features
Configure your band, scheduled shutoff, and night mode.
Configure your band, scheduled shutoff, and night mode.
Recommended setup
Temperature Band
22–25°C
Scheduled Shutoff
13:00–21:00
Night Mode
Optional
These defaults cover the majority of AC waste in rental properties. You can adjust from the guide.
Pricing
Choose the setup that
fits your property.
Most properties use 3–5 units for full coverage.
Starter
1 Unit
€69.90
single unit
Only partial impact on your total energy cost
✓ Full Voltvert functionality
✓ Works with your AC instantly
✓ Same savings per unit
Limited impact
⭐ Most popular choice
3 Units
€189
€63 per unit · Covers most 2–3 bedroom properties
Typical savings: €900–€2,100/year
✓ Covers most properties
✓ Immediate impact on total energy cost
✓ Best balance of cost vs. savings
Chosen by most Voltvert customers
💰 Best value
5 Units
€295
€59 per unit · Save €50 vs buying individually
Typical savings: €1,500–€3,500/year
✓ Full property coverage
✓ Lowest cost per unit
✓ Highest total savings
Best price per unit — saves the most long term
Not sure how many you need?
1–2 rooms→3 units
3–5 rooms→5 units
Most properties recover the cost within the first 2–5 months.
After that, every month is pure savings.
Volume & B2B
Managing a hotel chain
or 10+ properties?
Hotels, aparthotels, property management companies and agencies operating 20+ AC units get dedicated onboarding, volume pricing, and a direct account contact. Orders of 100+ units are quoted individually.
✓ Volume pricing from 20 units
✓ Dedicated account manager
✓ Custom onboarding & team briefing
✓ Invoicing & procurement support
20–49 units
~€54 per unit
Save ~22% vs single price
50–99 units
~€48 per unit
Save ~31% vs single price
100+ units
Custom quote
Contact us for hotels & chains
FAQ
Questions we get asked.
Will guests notice that the AC is limited?
In most cases, no. Guests can still operate the remote and adjust temperature within the configured band. The experience feels normal — they simply can't set it to extreme temperatures. Voltvert enforces guided limitations, not obvious restrictions.
Will this affect guest reviews?
No. Guests can still use the AC normally — just within a sensible range. Most don't notice any difference. If anything, a well-cooled room at 22–24°C is more comfortable than one blasted at 16°C.
Does it work with my AC brand?
Voltvert is built on a universal infrared platform with over 6,000 AC codes, compatible with the vast majority of split AC units from major brands including Daikin, Mitsubishi, Samsung, LG, Fujitsu, Panasonic, Gree, Haier, and hundreds more. Check the full brand code list →
What if there's a heatwave and guests need more cooling?
The temperature band is configurable. You set the limits. During exceptional conditions, you can override the settings or temporarily expand the band. Voltvert gives you control — not a rigid rule.
Is this legal / can I do this to guest accommodation?
Yes. Property owners are entitled to set operational parameters for appliances in their properties. Voltvert does not remove guest comfort — it removes irrational misuse. Guests are always informed of the AC operating range.
Can I use one Voltvert for multiple rooms?
Each Voltvert unit controls one AC unit. For multi-room or multi-property setups, volume pricing is available — contact us.
How is this different from a smart thermostat?
Smart thermostats require installation, WiFi, and ongoing management. Voltvert requires none of those. It works with existing remotes and existing infrastructure in under 2 minutes.
From the blog
Insights for property
operators.
View all articles →
Temperature band lock vs smart thermostat: what actually works in rentals?
Smart thermostats need WiFi, installation, and ongoing management. We compare both approaches and explain why simplicity wins in short-term rentals.
Read articleWhy guests overcool — and what property owners can do about it
The psychology behind guest AC misuse: why people behave differently with appliances they don’t pay for, and the structural fix that actually works.
Read articleStop paying for
your guests' wasteful electricity usage.
Pays for itself in one season. Saves money every month after.
No app. No WiFi. No installation. Works with existing AC units.