Skywalker X8 Solar Panel

I’m planning to use Solar Panel on my Skywalker X8 wing.

I’m a beginner in this. I read some articles regarding Solar Panels to increase the flight time.

Can anybody suggest me exact panel or anything?

I’m using custom made 4S7P lithium ion battery and I have TP 4056 with me.

The battery is 21000mAh and I wish to charge it with 1A current.

What I’m looking is that a Power module that can charge and discharge LI-Ion or Li-Po batteries at same time. (Just like our Smartphones)

Also a set of flexible light weight solar panels for this application.