Seafront luxury villa, Porto Heli
Porto Heli Seafront, 21061 Porto Heli, Argolid, Greece
€4,200,000
Architect-designed Porto Heli seafront estate above a private bay. The largest load profile in the portfolio: pool, guest wing, two EVs and jetty services on an exposed coastal feeder.
- Living area
- 410 m²
- Rooms
- 10
- Built
- 2023
- Occupants modelled
- 6
- Heating
- Heat pump
- Region
- Argolid / Peloponnese
Site & energy profile — Argolid / Peloponnese
Solar conditions
- Unshaded south flat roof over the main volume
- 200 m² usable roof area
- 1,600 kWh/kWp regional yield · 2% shading derate
- Modelled at 1,568 kWh/kWp → 47,040 kWh/yr from 30 kWp
Load drivers
- Infinity pool, jetty services and outdoor lighting
- Heat pump comfort across 410 m² plus a guest wing
- Two EVs and a boat charging point on three-phase supply
- Staffed high-season occupancy of six or more
Resilience context
Coastal Peloponnese feeder — storm-related and seasonal-load outages.
Remote seafront estate with a long feeder run: whole-property backup and generator hand-over protect guests, jetty and water systems.
Indicative storage for this profile: 29 kWh.
Home Energy IQ summary
Home Energy IQ score
Porto Heli Seafront, Porto Heli, Argolid
Argolid / Peloponnese · 1,568 kWh/kWp modelled yield
Energy demand
42 kWh/m²a
Running cost
€7,180/yr
CO₂ footprint
14.56 t/yr
Potential after retrofit
Indicative annual saving
€6,227
Highest-impact next step
Rooftop solar PV
≈ €7,357/yr saved · payback 5.9 yrs
Modelled retrofit plan
Modelled for this Argolid / Peloponnese property at 1,568 kWh/kWp, with a €45,000 indicative budget and a resilience and independence objective. Adjust the assumptions in the simulator to model your own scenario.
Annual saving
€6,227
Net investment
€43,500
incl. €0 subsidies
Simple payback
7.0 yrs
CO₂ avoided
12.45 t/yr
Your recommended Home Energy IQ configuration
ISLAND ENERGY 30+
Why this fits your property
- A 410 m² property using about 34,667 kWh of electricity a year sits inside the ISLAND ENERGY 30+ band (Sized to site load and outage profile).
- Your roof in Argolid / Peloponnese supports roughly 31,360 kWh of production a year, which the 15–20 kW inverter and 30–60 kWh battery are sized to use rather than export.
- A heat pump, pool circulation, more than one EV and a separate guest house push the evening load up, so storage is sized above the entry system.
- Island or weak-feeder supply with reported outages makes whole-home backup the deciding factor, not just savings.
Projected solar production
31,360 kWh/yr
20 kWp · 1,568 kWh/kWp in Argolid / Peloponnese
Self-powered
58%
Catalogue range 80–100%
Estimated backup
8.3 h
Whole-home comfort loads at ≈2.9 kW
Indicative investment
from €34,900
≈ €368/month over 10 years, excl. VAT
All figures are indicative model estimates for comparison, based on the details you entered. Production, self-powered share and backup duration depend on real weather, occupancy and tariffs. Nothing here is a quotation or a guaranteed performance figure.
Included in this configuration
- Solar PV
- 15–20 kWp
- Battery
- 30–60 kWh LFP
- Hybrid inverter
- 15–20 kW three-phase
- Generator
- Optional / recommended
- Connectivity
- Ethernet + Wi-Fi + 4G fallback
- Whole-home backup
- Automatic generator start
- Battery recharge from generator
- Smart load shedding
- 4G monitoring
- Remote reset
Indicative installed price. Final pricing is subject to property survey, electrical infrastructure, grid connection, roof conditions and final engineering design.
Step 3 · Configure upgrades
Optional improvements
Your system works without any of these. They are shown because something in your inputs suggests they could be worth discussing at the assessment.
EV CHARGE
Charges the car on surplus solar instead of peak-tariff grid power — typically €300–€600 a year on the mileage assumed here.
You reported more than one electric vehicle.
Charge power and savings depend on your vehicle, tariff and daily driving pattern.
V2H READY
Prepares the electrical architecture so the vehicle could later support the house during an outage.
Only worth adding while the installation is being designed — retrofitting is more disruptive.
Actual vehicle-to-home operation depends on vehicle compatibility and applicable regulation.
SMART VILLA
Adds circuit-level metering and automatic load shifting, so the pool pump, heat pump and boiler run on solar rather than at night.
A pool pump is one of the largest shiftable loads on this property.
Circuit visibility requires CT clamps at the distribution board; without them, circuit values are estimated.
GENERATOR BACKUP
Extends backup from hours to days by starting automatically and recharging the battery when an outage runs long.
Island or remote supply with outages long enough to outlast a battery.
Requires a suitable generator, fuel storage and a site survey; sizing is confirmed at assessment.
CONNECTIVITY+
Keeps monitoring and alerts working through a dedicated gateway with 4G backup when broadband drops.
Remote properties frequently lose fixed-line connectivity before they lose power.
Coverage depends on the mobile network at the property.
BATTERY CAPACITY UPGRADE
Adding around 75 kWh of storage would carry more of your evening load and lift the modelled self-powered share by roughly 5–10 points.
Modelling puts you near 58% self-powered, at the lower end of this system's range.
Battery expansion is confirmed against your measured consumption profile at the technical assessment.
ENERGY CARE
Continuous monitoring, alerts and an annual performance review so underperformance is caught early rather than at year end.
Recommended for every installation; can be added or dropped later.
A recurring service subscription, separate from the installed system price.
Step 4 · Payment options
≈ €331.62/month
10% deposit (€3,490) · 10 years · 4.90% p.a. illustrative rate
Modelled energy saving
€518.92/month
Net +€187.30/month
Illustrative repayment estimate only — not a credit offer, quotation or approval. It assumes an indicative 4.90% annual rate, equal monthly instalments and the indicative system price before VAT and any subsidy. Actual terms depend on the lender, your circumstances and the final assessed price.
Step 5 · Confirm with an assessment
Confirm your Home Energy IQ plan
A site assessment validates roof and mounting, the electrical panel and connection, permitting requirements and the final price. Everything above stays an indicative model until an engineer has seen the property.
Your plan so far
- · Recommended system: ISLAND ENERGY 30+ (Energy Resilience) — from €34,900 excl. VAT, indicative
- · Property profile: Argolid / Peloponnese · 20 kWp modelled at 1,568 kWh/kWp
- · Modelled outcomes: 31,360 kWh/yr solar · 58% self-powered · ≈8.3 h backup (Whole-home comfort loads)
- · Options to discuss: base configuration only
- · Financing interest: not reviewed yet
Prefer to read first? Detailed financing calculator · How assessments work
Today
42 kWh/m²a
€7,180/yr · 14,560 kg CO₂
After recommended plan
42 kWh/m²a
€953/yr · 2,107 kg CO₂
Projected class movement
Cumulative saving over 10 years (with 3% annual energy price inflation): €71,386
What your recommended system delivers
Every line below is delivered by ISLAND ENERGY 30+ or one of its optional Home Energy IQ modules — ranked by impact per euro against your goal and budget.
Rooftop solar PV
Generates power at roughly a third of grid price for 25+ years.
Delivered by your recommended Home Energy IQ system
- Net cost
- €43,500
- Saving/yr
- €7,357
- Payback
- 5.9 y
Catalogue options outside your budget
Smart energy manager & hydronic balancing
Cheapest measure per euro saved and the data layer for everything that follows.
Optional add-on: SMART VILLA module
- Net cost
- €1,800
- Saving/yr
- €199
- Payback
- 9.0 y
Home battery storage
Shifts midday solar into evening use and raises self-consumption to ~70%.
Delivered by your recommended Home Energy IQ system
- Net cost
- €25,580
- Saving/yr
- €1,462
- Payback
- 17.5 y
Smart EV charger (11 kW)
Charges on surplus solar instead of peak-tariff grid power.
Optional add-on: EV CHARGE module
- Net cost
- €1,900
- Saving/yr
- €74
- Payback
- 25.7 y
All figures shown are indicative estimates generated from standardised building models and average market prices. They are not a certified energy performance assessment, an engineering report, or financial advice. Actual savings, costs, subsidies and payback depend on an on-site assessment of your property.
All figures shown are indicative estimates generated from standardised building models and average market prices. They are not a certified energy performance assessment, an engineering report, or financial advice. Actual savings, costs, subsidies and payback depend on an on-site assessment of your property.