Solar powered arduino uno

Hello guys,
i use 2x18650 batteries(NCR18650B) INLINE for 7.2v and 3400mAh for my arduino uno project. How can i use TP4056 or someone other module to charge them with solar power.
I found only solutions for 1 battery..
thanks

is one cell charging IC

some other solutions please?

What type of charge controller are you using MPPT or PWM?

Have you checked this thread? charging 2 AA batteries with 1 solar panel (NO arduino) - #12 by Sagirokach

nothing bought yet. Do you have suggestions for this?

I use these, Amazon.com

they do not have a useless display and use less battery power to operate.

ok thanks, but what about MPPT or PWM ??
whats the best solution for this with 2 18650 bat?

You could type words into an internet search engine.

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