Fotovol Guide — Q&A
Short answers to the most common questions about solar panels, the Casa Verde program and real-world costs.
Solar inverters — brands, types, and how to choose
String vs hybrid, brands on the Romanian market (Huawei, Sungrow, Fronius, SolarEdge), MPPT, efficiency, and what to check on the datasheet.
Updated 26 April 2026
Solar panels — brands, what to look for, what to avoid
How to filter panel brands (the Bloomberg Tier-1 list), why 450 W is the residential sweet spot, and what to verify on the datasheet.
Updated 26 April 2026
How to identify if your service is single-phase or three-phase
Four quick methods to check your connection type: the switchboard, the meter, the wire count, or a call to your grid operator.
Updated 26 April 2026
Single-phase vs three-phase — what it means for your solar system
The real 6–9 kW single-phase limit, when you need three-phase, upgrade steps and costs, and how it affects PV sizing.
Updated 26 April 2026
How to choose the right solar panel installer
ANRE certifications, AFM validation, what to ask on the first call, red flags, and why 450 W panels are the residential sweet spot.
Updated 10 July 2026
The Casa Verde Fotovoltaice subsidy — how it works
How Romania's AFM Casa Verde Fotovoltaice subsidy works: the RON 20,000 cap, who qualifies, application steps and common rejection causes.
Updated 26 April 2026
Fotovol newsletter — monthly solar tips
One email per month with the most useful tips for your solar home. Unsubscribe any time.