Neo Sun Solar Water Heater 15 Tube 180L

Complete Stainless-Steel Construction for Rust-Free Longer Life

The neoSun Solar Water Heater is engineered for Nepal's harsh water and weather conditions. Unlike ordinary solar heaters that use MS or galvanized body, the entire neoSun system is made of Complete Stainless-Steel - outer tank, inner tank, stand, reflector, and all accessories. This guarantees 100% rust-free operation, no corrosion even with hard water in Kathmandu, Chitwan, Pokhara, and a service life of 15-20 years. Mirror-finish BA stainless steel gives it the premium look you see in the photo.

Corrosion-Resistant SS304 Inner Tank

The heart of the system is its inner tank. We use SUS304-2B Food-Grade Stainless Steel, 0.5mm thick - the same grade used in kitchenware and medical equipment. It is highly corrosion-resistant, non-reactive, and safe for drinking water. No scaling, no rust mixing in your hot water, no leakage for years. This is why we confidently give 5 years warranty on the tank.

High-Quality Three-Target Vacuum Tubes for Better Efficiency

neoSun uses Three-Target Vacuum Tubes - 58mm x 1800mm borosilicate glass with advanced ALN/AIN-SS/CU selective coating. Three-target sputtering technology gives 95% solar absorption and only 5% emission loss. The dark blue coating captures heat even in diffuse light and works efficiently at -15°C. Each tube works like a thermos flask - vacuum between two glass layers prevents heat loss. Result: faster heating and hotter water even on cloudy winter days.

60mm Polyurethane Foaming Insulation to Prevent Heat Loss

Most local brands use 40-50mm insulation. neoSun uses 60mm High-Density Polyurethane Foam (PUF) Insulation injected at high pressure between inner and outer tank. This ultra-thick insulation acts like a blanket and keeps water hot for up to 72-96 hours. Heat loss is less than 5°C overnight. You get hot water early morning from yesterday's sun - critical for Nepali winters.

Argon Arc Welding for Inlet, Outlet, Air Vents and Drain Outlet

Leakage is the #1 problem in cheap solar heaters. neoSun solves this with Precision Argon Arc Welding (TIG Welding) on all joints - inlet, outlet, air vent, and drain outlet. Argon welding creates seamless, crack-free, and 100% leak-proof joints that can withstand high pressure and temperature. No normal welding marks, no future rusting points, no water seepage.

Electric Heating Rod with Thermostat Included for Cloudy Weather

Nepal has 7-10 days of continuous cloudy weather in monsoon and winter. neoSun comes with a Built-in 1.5kW / 2.0kW Electric Heating Rod with Automatic Thermostat (as per model). When there is no sun, just switch it on - it works like a normal electric geyser and heats the same 150L tank to 65°C automatically. Thermostat auto cuts off for safety. One system works all 365 days.

Additional Drain Outlet for Easy Tank Cleaning

Nepali water has sediments and hardness that settle inside tanks. neoSun provides an Additional Dedicated Drain Outlet at the bottom for easy flushing and cleaning. Just open the drain valve every 6 months to flush out mud, lime, and sediments. This prevents blockage, keeps heating efficiency high, and extends tank life. Maintenance is easy without opening the whole system - a feature missing in 90% of other brands in Nepal.

Bottom Line by Solar Filter Nepal Expert:
If you want a buy-once, use-for-20-years solar water heater that never rusts, never leaks, and gives hot water even in Kathmandu's winter fog, the neoSun Complete Stainless Steel 15-Tube with 60mm PUF and Argon Arc welding is the right investment.