Case Study: Installing a 6 kW Solar System at Home in Bucharest

★★★★★ Vasile Stan in Bucharest
 "I am very happy with Sunhome. Installing a 6 kW solar system has reduced our electricity bills by almost half, and the process was smooth and professional. I feel more in control of my energy and confident about future expansion, like adding a battery or an EV charger. The team guided us clearly through every step, from choosing the system to monitoring production. Highly recommend Sunhome to anyone considering solar for their home!"

Household Background and Motivation

Our household consists of three people living in a detached house with a pitched roof and good sun exposure in Bucharest. Electricity bills were rising and unpredictable. Appliances like the washing machine, dryer, and cooking devices are often used during the day. We wanted a solution that could reduce costs and give us control over our energy.

Key Insight:  Homeowners with consistent daytime electricity use and minimal roof shading can see significant benefits from a solar system without a battery.

Choosing the Right Solar System: Why 6 kW Instead of 10 kW

At first, we considered a 10 kW system, but we realized several practical factors:

• ✔ Current energy needs: A 6 kW system covers most daytime consumption. Oversizing to 10 kW would generate excess electricity exported to the grid at low compensation.

• ✔ Budget considerations: A 10 kW system would require a much larger initial investment. 6 kW allowed us to invest responsibly.

• ✔ Roof space and flexibility: Our Bucharest home could accommodate 6 kW comfortably, and future needs (like an EV) can be addressed by expanding the system later.

Selecting the Installer

Choosing the right installer was the most stressful part. Some quotes looked cheap but didn’t clearly include permits, monitoring, or grid registration. Others were more expensive without clear explanations.

Tips for choosing an installer:

• ✔ Transparent breakdown of total costs

• ✔ Clearly specified panel and inverter brands

• ✔ Warranty information provided upfront

• ✔ Clear timeline and response to technical questions

Installation Process

The installation took just a few days and went smoothly. The team was organized, safety-conscious, and respectful of our home. Paperwork and grid connection took longer than the physical installation but didn’t disrupt daily life.

Solar System Equipment Overview

• ✔ Solar panels

• ✔ Inverter

• ✔ Mounting structure

• ✔ Electrical protections and cabling

• ✔ Monitoring app

• ✔ Optional battery

First Months of Using Solar Energy

Once we could see real-time production in the monitoring app, we naturally adjusted habits:

• ✔ Running the washing machine and dryer during sunny hours

• ✔ Charging devices during peak solar production

Insight: This isn’t just about saving money — it gives a real sense of control over our energy use.

Production, Electricity Savings & Investment

In our region, a 6 kW solar system with proper orientation and minimal shading typically produces 5,000–7,000 kWh per year. For our household, this covers most daytime electricity use and significantly reduces monthly bills.

Example of monthly electricity production (kWh) for a 6 kW system in Bucharest

Lessons Learned

• Start with realistic system size: Oversizing early can waste money if electricity can’t be used.

• Installer choice matters: Cheap quotes may hide long-term problems.

• Equipment integration is key: Coherent branded systems reduce technical issues.

• Adjust consumption habits: Using electricity during peak solar production maximizes savings.

Recommended Questions Before Installation

•  What brands are included for panels, inverter, and battery?

•  Is the system fully integrated and compatible?

•  What does the total price include (installation, permits, monitoring)?

•  Who handles grid connection and registration?

•  How are component failures handled?

•  Can the system be expanded later?

•  What monitoring data will I have access to?

Final Thoughts

We didn’t install solar to follow a trend. We did it to gain control over our long-term electricity costs. The system doesn’t eliminate bills entirely, but for a home like ours, it makes a real, measurable difference. Take your time, compare options, and ask questions — the right decision should feel confident, not rushed.

Thanks to Vasile Stan, Bucharest, for sharing his solar journey. We hope this case study helps other homeowners considering a 6 kW solar system in Romania.

Results are specific to this household and may vary depending on roof orientation, consumption patterns, and local conditions.