Photovoltaics
Photovoltaics includes solar panels, inverters, battery storage and installation accessories for residential and commercial PV systems. Choose panels by brand and output (Wp), inverters by power and number of phases (1-phase / 3-phase), and batteries by usable energy (kWh) and voltage (low-voltage / high-voltage). Everything needed to build a complete solar power system in one category.
We offer a wide selection of photovoltaic panels ideal for domestic and commercial applications. You can choose from our AEG, Aiko Solar, Canadian Solar, Hanersun and Jinko Solar brands. High quality and reliability of the panels are guaranteed, as they are one of the leading manufacturers in the industry.
In addition to the panels, you will also find inverters in this category, essential for converting solar energy into electricity suitable for household appliances. The inverters are reliable, efficient and easy to install. You can choose the inverter according to the brand, the power itself or the number of phases.
For those who want to maximize the use of solar energy, we also offer different types of batteries. These batteries allow excess energy to be stored for later use, making them ideal for areas with limited access to the power grid, increasing energy independence, or efficient use of stored energy. We offer batteries from quality manufacturers in brands such as AEG, BYD, Dyness, Goodwe, Huawei, LG ES, Marstek, Pylontech, SolarEdge, Solinteg, Solis, Soluna, Victron Energy, and Vision Battery. Another option is commercial energy storage. You can also choose by voltage from both low-voltage and high-voltage batteries.
Finally, our category includes many accessories, including smart meters LAN, or Wi-fi modules, Optimisers, Monitoring devices, Solar heating and Connectors
With our comprehensive range of photovoltaic systems, you will step towards a more sustainable future. For more information or individual advice, please do not hesitate to contact our team of experts, who are ready to assist you in choosing the ideal solution for your needs. Discover the power of solar energy with us and start your journey to a greener and more efficient home today!
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Photovoltaics: components, selection tips, and compatibility
This category brings together the key parts for building a complete solar power system: PV modules (panels), inverters (grid-tie, hybrid, off-grid, microinverters), battery storage, mounting systems, and electrical installation material. The assortment includes 993 items, with 219 products currently in stock.
You can choose from brands such as AEG, Aiko Solar, Canadian Solar, Hanersun, Jinko Solar, and other manufacturers available via filters.
“When choosing a PV system, decide first whether you need battery readiness - that determines a hybrid vs grid-tie inverter. Then match inverter phases (1-phase / 3-phase), and only after that fine-tune module choice by Wp and cell technology.”
— PV Specialist Ladislav, ONSA Plus
What is included in a photovoltaic system?
A typical PV system consists of solar modules that generate DC power, an inverter that converts DC to usable AC power, optional batteries for storage, and the supporting parts—mounting, cabling, connectors, and electrical protection. The right combination depends on your installation type (home vs commercial), roof construction, and energy goals (self-consumption vs backup).
How to choose photovoltaic modules (panels)
Start with panel power (Wp) and physical constraints (available roof area). Then compare module type (monofacial vs bifacial), and choose the most suitable cell technology: TOPCon, N-type monocrystalline, HJT (heterojunction), or Mono PERC. Finally, check practical details such as frame color and connector type (e.g., MC4, EVO2, T4/T6).
- Higher Wp can reduce the number of panels needed, but may require enough space and compatible string design.
- Bifacial modules can gain additional yield when installed with reflective surfaces and correct spacing.
- TOPCon / N-type / HJT are often chosen for performance and temperature behavior—match them to your design goals and budget.
Which inverter type do I need: grid-tie, hybrid, off-grid, or microinverter?
Inverters define how your system interacts with the grid and whether storage is supported. On this page you can filter by inverter Type: grid-tie, hybrid, off-grid, and microinverter.
- Grid-tie: standard grid-connected PV focused on producing and feeding/consuming energy.
- Hybrid: designed for PV + battery storage and often supports advanced energy management.
- Off-grid: for standalone systems that do not rely on the public grid.
- Microinverters: installed per panel; useful on complex roofs and in shading scenarios.
1-phase vs 3-phase inverters: what’s the difference?
Choose the number of phases primarily based on your electrical setup and the target system output. This category includes both 1-phase and 3-phase solutions (see “Number of phases” filter). 1-phase is common for smaller residential systems, while 3-phase is typical for higher outputs and balanced load distribution. Always align the inverter selection with your grid connection rules and project design.
Battery storage: how to choose usable energy (kWh)
Batteries help increase self-consumption and can support backup readiness when the system is designed for it. Choose by usable energy (kWh), charge/discharge power, and compatibility with your inverter. If you filter batteries by model series, you will see options such as BYD HVS and BYD HVM.
- Smaller kWh typically covers evening consumption and short peaks.
- Larger kWh supports longer coverage and higher autonomy (depending on usage patterns).
- Confirm whether your inverter is hybrid (battery-ready) or whether you need an alternative battery integration.
Mounting systems and electrical installation material
Reliable PV performance depends on safe installation and correct components. Use mounting systems matched to the roof type and load conditions, and select suitable electrical installation material (cables, protection devices, connectors) to meet safety and compliance requirements.
Quick comparison table
| Component | Main specs to compare | What it affects |
|---|---|---|
| PV modules | Power (Wp), module type (mono/bifacial), cell tech (TOPCon/N-type/HJT/Mono PERC), connector (MC4/EVO2), dimensions | Panel count, roof area usage, yield potential, cabling compatibility |
| Inverters | Type (grid-tie/hybrid/off-grid/micro), phases (1/3), model series, MPPT design (project-dependent) | Grid compatibility, battery readiness, performance in shading (depends on design) |
| Batteries | Usable energy (kWh), model series (e.g., BYD HVS/HVM), power, warranty (product-specific) | Self-consumption, backup strategy, autonomy time |
| Mounting & installation | Roof type suitability, material & corrosion resistance, load rating, electrical protection & connectors | Safety, longevity, compliance, installation speed |
FAQ: Photovoltaics
What does Wp mean on a solar panel?
Wp (watt-peak) is the panel’s rated power under standard test conditions. It helps compare modules; real output depends on temperature, irradiation, and installation conditions.
Are 500 W solar panels suitable for home installations?
Yes—if your roof space and mounting allow the panel dimensions and weight. Higher-Wp panels can reduce the number of modules, but the final design must match your inverter and string limits.
What’s the difference between bifacial and monofacial modules?
Monofacial modules generate power mainly from the front side. Bifacial modules can also harvest reflected light from the rear side, increasing yield when installed with proper spacing and reflective surfaces.
TOPCon vs N-type vs HJT vs Mono PERC - what should I choose?
These are cell technologies with different performance characteristics. As a rule, TOPCon, N-type, and HJT are often chosen for efficiency and temperature behavior; Mono PERC is a common cost-effective option. Match the choice to your budget and system goals.
Which connector is more common: MC4 or EVO2?
MC4 is widely used across the industry, while EVO2 may appear on selected product lines. Always match connector type to your existing cables and accessories—or use certified compatible adapters where appropriate.
Do I need a 1-phase or 3-phase inverter?
It depends on your electrical connection and target output. 1-phase is common for smaller residential systems, while 3-phase is typical for higher outputs and balanced loads. Follow local grid requirements and your system design.
What’s the difference between a hybrid and a grid-tie inverter?
A grid-tie inverter is focused on grid-connected PV generation. A hybrid inverter is designed to integrate PV with battery storage and energy management features (model-specific).
Can I add a battery later?
Often yes, but it depends on the inverter and system architecture. Hybrid inverters are typically battery-ready; with grid-tie setups you may need a compatible solution or system redesign—always check manufacturer compatibility.
How do I estimate required usable battery energy (kWh)?
Start from the energy you want to cover outside PV production hours (evening/night) and your peak loads. Then choose usable kWh that matches your goals (higher self-consumption vs longer backup), while staying compatible with your inverter and battery series.
When do optimisers or microinverters make sense?
They’re most useful on roofs with complex orientations or partial shading, where module-level control can reduce mismatch losses. The best choice depends on the layout and your design priorities.
Note: Final system sizing and compliance depend on your installation site, grid rules, and engineering design.
