A. Keyboard pay go solar product. With correct code to unlock it; after payment from end user, will generate a code to end user mobile to unlock it. Days, Weeks, months, 1 year, choose you want to make payment to generate new code.
B. Cloud platform 4G/2G communication control pay go solar product, after payment from end user, distributor will set timer from cloud platform page for end user, then automatically turn on the product. This is smartest model, no matter where you are, you can watch all key parameters, device address, and control it.
Pay as you go models has one more payable module inside of the product, so that distributors can control it, no pay no go, no need to make full payment. So that the end clients could be buying from you easily.