Stone-and-white villa, Paros
Naoussa Hillside, 84401 Naoussa, Paros, Greece
€1,890,000
Parian marble-and-whitewash villa above Naoussa bay. Solar is already installed — adding storage converts midday Cycladic surplus into evening independence and outage cover.
- Living area
- 245 m²
- Rooms
- 6
- Built
- 2015
- Occupants modelled
- 5
- Heating
- Heat pump
- Region
- Cyclades
Site & energy profile — Cyclades
Solar conditions
- South-west flat roof above the stone wing
- 120 m² usable roof area
- 1,650 kWh/kWp regional yield · 4% shading derate
- Modelled at 1,584 kWh/kWp → 13,306 kWh/yr from 8.4 kWp
Load drivers
- Pool and garden irrigation on the terraced hillside
- Heat pump cooling across the stone and rendered wings
- Seasonal rental occupancy of five in high summer
- Existing 8.4 kWp rooftop array with no storage
Resilience context
Cycladic island network — constrained summer capacity and repeated outages.
Existing 8.4 kWp array covers daytime load, but without storage every Parian outage still takes the villa dark.
Indicative storage for this profile: 24 kWh.
Home Energy IQ summary
Home Energy IQ score
Naoussa Hillside, Naoussa, Paros
Cyclades · 1,584 kWh/kWp modelled yield
Energy demand
70 kWh/m²a
Running cost
€3,448/yr
CO₂ footprint
7.10 t/yr
Potential after retrofit
Indicative annual saving
€1,437
Highest-impact next step
Smart energy manager & hydronic balancing
≈ €174/yr saved · payback 10.3 yrs
Recommended Home Energy IQ system
Island location with a high resilience requirement.
Modelled retrofit plan
Modelled for this Cyclades property at 1,584 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
€1,437
Net investment
€23,280
incl. €600 subsidies
Simple payback
16.2 yrs
CO₂ avoided
2.88 t/yr
Your recommended Home Energy IQ configuration
ISLAND ENERGY 30+
Why this fits your property
- A 245 m² property using about 22,486 kWh of electricity a year sits inside the ISLAND ENERGY 30+ band (Sized to site load and outage profile).
- Your roof in Cyclades supports roughly 31,680 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 and pool circulation 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
31,680 kWh/yr
20 kWp · 1,584 kWh/kWp in Cyclades
Self-powered
79%
Catalogue range 80–100%
Estimated backup
12.4 h
Whole-home comfort loads at ≈1.9 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.
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.
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
€119.75/month
Net €-211.87/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: Cyclades · 20 kWp modelled at 1,584 kWh/kWp
- · Modelled outcomes: 31,680 kWh/yr solar · 79% self-powered · ≈12.4 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
70 kWh/m²a
€3,448/yr · 7,097 kg CO₂
After recommended plan
66 kWh/m²a
€2,011/yr · 4,214 kg CO₂
Projected class movement
Cumulative saving over 10 years (with 3% annual energy price inflation): €16,474
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.
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
- €174
- Payback
- 10.3 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
- €21,480
- Saving/yr
- €1,210
- Payback
- 17.8 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.