It is fully warmed up to 40 degrees in less than one minute.
Step 1: Sewing
In each panels tape connected in parallel 2x1m and has an independent power button.. It takes about 3A under 12V (36W) for each one or 72W together.
Step 2: "Soldering"
Step 3: Connecting
But as you can see sewed contact is colder than the tape itself (left contact).
Wraped contact (on the right) is more hotter than tape.
Step 4: Using as a modular system
Step 5: Using as a modular system
Step 6: Using as a heated module
On the inner surface of conventional jackets I sewed 4 pieces of Velcro.
Now I can at any time fix the heating panel on a jacket and make it heated.