Optimized for large water volumes at low pressure, the 50-tube panel allows water to circulate directly in the collector tubes. No pressure is applied; typically systems are vented to the atmosphere.

Solar pool heating, hotel, apartment and industrial applications with large volumes of water in a central location use these 5 square meter area solar panels.

Operates on thermo siphon principle, typically in large systems.

· Graded Al-N/Al selective coating, high energy absorption and low heat transfer losses

·  highly evacuated with pressure ≤5×10^-2 Pa in the space between outer and inner covers, so no heat loss

·  High transparency with boron silicon glass, high resistance to cold water shock

·  Low pressure applications

·  50 tube panels can be joined in series