Hello, it is recommended to look at the vacuum tube type, bracket thickness, water tank material and sturdiness of the buyer (after-sales service is very important, because the price after-sales for a single warehouse is still relatively high)! At present, under the condition of ensuring quality, the general market price outside a single warehouse is between 110-150 yuan/tube. Because the dealers are different, the prices are also different. It is recommended to refer to the following. several companies.
Recommended "Dr. Sun" solar energy, three warehouse models (no need for water level probes and solenoid valves), heating and hot water utilization rates are fast in rainy weather, and the after-sales service rate is also greatly reduced, saving time. It also saves electricity. This model only takes 20 to 30 minutes to heat upr without sunlight, while a single warehouse takes 2-3 hours