Solar panel 500 W: when to take it, and when 400 or 600 W is better
Customers ask us for a 500 W panel for the typical private roof in Ukraine: pitched metal tile, 30-50 m² of usable area. Classes 530-570 W come in the 144 half-cell format (about 1.13 × 2.28 m each), weighing around 28 kg. This is our baseline for sizing a home 5 kW PV system: 9-10 panels of 555 W each deliver 5 kW peak. The brand we keep in stock: Veichi VCS-144H series.
Technically this is monocrystalline PERC+ with 20.5-22.1% efficiency (per the manufacturer datasheet). Working voltage Vmpp 41-43 V, Voc 49-51 V: a string of 8 in series gives roughly 400 V Voc, which fits the MPPT window of most hybrid inverters at 60-500 V. Our warehouse most often ships VCS-144H-555-P (555 W), because it gives a round panel count for a 5 kW inverter with no excess.
First question we ask: mono or bifacial
Standard monofacial (P models): classic panel with a white backsheet, mounts onto a pitched metal-tile roof. Bifacial (D models) has glass on both sides and adds 10-25% generation via albedo (reflection from the surface) but requires a 15-20 cm gap from the roof and a light surface underneath. Bifacial on a roof is rarely worth the premium. On a ground array or trackers, yes, it pays off. We ask up front: roof or ground mount. Without that, selection cannot proceed.
What else we ask. First: which inverter is installed or planned, because the MPPT window dictates string length. Second: is there shading from a chimney or trees after 11:00 (even one shaded cell on an old panel without bypass diodes used to drag down the whole string; modern 144 half-cell with 3 bypass diodes loses less, but still cuts 10-15% of generation). Veichi warranty: 12 years on materials, 25 years linear performance (84.8% of nameplate after 25 years, per the datasheet). We ship from our Kyiv warehouse in 1-3 days.
| Model | Power | Efficiency | Type | Application |
|---|---|---|---|---|
| VCS-144H-530-P | 530 W | 20.51% | Mono-facial | Residential PV, budget option |
| VCS-144H-550-P | 550 W | 21.28% | Mono-facial | Home PV 5–10 kW |
| VCS-144H-555-P | 555 W | 21.48% | Mono-facial | Best value per watt |
| VCS-144H-560-D | 560 W | 21.67% | Bifacial | Ground mount, trackers |
| VCS-144H-570-D | 570 W | 22.06% | Bifacial | Maximum output from limited area |
500W solar panel manufacturers
Veichi is a Chinese industrial equipment manufacturer specializing in variable frequency drives, hybrid inverters, and solar panels. The VCS-144H series includes modules rated 530–570 W built on 144 half-cut monocrystalline cells. Veichi panels carry IEC 61215 and IEC 61730 certifications, a 12-year materials warranty, and a 25-year performance guarantee. Open-circuit voltage of 49–51 V ensures stable operation in series strings with most MPPT controllers.
Solar panels by specifications
- 400W Solar Panel: compact modules for small roofs and balcony PV systems
- 600W Solar Panel: high-power modules for commercial and industrial systems
- Solar Panels for Home: selecting the right power for household needs
- Batteries for Solar Panels: energy storage for off-grid capability
- 5 kW Hybrid Inverter: ideal pairing for a 10-panel 500 W array
Warranty and support
All 500W solar panels come with the manufacturer's official warranty: 12 years on materials and workmanship, 25 years on performance (minimum 84.8% of rated power after 25 years). Our engineers will calculate the required number of panels, select the inverter and batteries for your project. Payment by bank transfer for businesses or by card. Delivery across Ukraine with secure packaging.
