Solar for Weekend Homes: Special Case

The Problem

You have a house you visit on weekends. You're not there Monday–Friday.

This changes everything about solar economics.

Why Weekend Homes Are Different

Factor Permanent Home Weekend Home
Days occupied 365 104 (Sat–Sun)
Solar generated Mon–Fri Consumed immediately Exported or stored
Self-consumption rate 50–65% 20–35%
Battery usefulness High (daily cycling) Low (weekly cycling)
Peak solar hours Someone is home House is empty
Evening consumption High (cooking, heating) Moderate (short stay)

Self-consumption: Solar power used immediately in your home. The rest is exported to the grid at a low feed-in price. For weekend homes, most solar is generated Monday–Friday when nobody's there — so it all gets exported at pennies per kWh.

Real Weekend Home Math

Example: Taliándörögd, Hungary

Permanent Weekend
Annual consumption 6,200 kWh 2,200 kWh
8 kWp solar generation 8,160 kWh 8,160 kWh
Self-consumption 65% (5,300 kWh) 25% (2,040 kWh)
Export 35% (2,860 kWh) 75% (6,120 kWh)
Feed-in value (5 Ft/kWh) 14,300 Ft 30,600 Ft
Self-consumption value (36 Ft) 190,800 Ft 73,440 Ft
Gross annual value 205,100 Ft 104,040 Ft
Maintenance 60,000 Ft 60,000 Ft
Net value 145,100 Ft 44,040 Ft
System cost (2.5M Ft)
Simple payback 17.2 years 57 years

At current prices, solar doesn't pay back for a weekend home.

The Battery Trap

"But I can store weekday solar for the weekend!"

The water tank analogy: Imagine a 1,000-litre water tank. You fill it all week while you're away. On Friday you arrive and need 200 litres for the weekend. The tank overflows all week, wasting water. You only use 200 litres. The tank was massively oversized for your actual need. A battery works the same way — it fills up Monday, then has nothing to do until Friday.

Reality check:

Month Weekday Surplus Weekend Need Battery Useful?
Jan Small High (heating) Yes
Feb Moderate Low Partial
Mar Large Low No
Apr Very large Very low No
May Very large Very low No
Jun Very large Very low No
Jul Very large Very low No
Aug Very large Very low No
Sep Large Low No
Oct Moderate Low Partial
Nov Small Moderate Yes
Dec Small High (heating) Yes

Battery is only useful in January, November, and December.

For the other 9 months, weekend solar covers your weekend consumption. The battery sits full.

Real Battery Cycles (Weekend Home)

Month Equivalent Full Cycles
Jan 0.5
Feb 0.3
Mar 0.2
Apr–Sep 0.1–0.2
Oct 0.2
Nov 0.4
Dec 0.6
Annual total ~10–15 cycles

At 10 cycles/year:

Cycle: One full charge and discharge. A battery cycled daily gets 365 cycles/year. A weekend home battery might get only 10–15 cycles/year. It's like buying a gym membership and going once a month.

When Solar DOES Work for Weekend Homes

✅ You have an EV and charge it there (uses weekday surplus)
✅ You work from home some weekdays (increases self-consumption)
✅ You have a heat pump running all week (maintains temperature)
✅ You have time-of-use tariffs (store cheap, sell expensive)
✅ You value energy independence above money (emotional purchase)
✅ You plan to retire there full-time (future permanent home)

Strategies for Weekend Homes

Strategy 1: No Solar, H-Tarifa AC (Best Financial)

Strategy 2: Small Solar (4–5 kWp), No Battery

Strategy 3: Large Solar + Battery (Worst Financial)

Strategy 4: Large Solar + EV Charging

The Honest Weekend Home Verdict

Priority Action Cost Payback
1 Insulation 500k–1M Ft 3–7 years
2 H-tarifa AC 1M Ft (sunk) 2–3 years
3 Small solar (4 kWp) 1.5M Ft 15–20 years
4 Large solar (8 kWp) 2.5M Ft >25 years
5 Battery 1.1M Ft Never

For weekend homes: Insulation + H-tarifa first. Solar is optional. Battery is a luxury.

Last updated: May 2026