Suggest a charge controller for lithium

[Willowflowage]

I'm building a small battery box for a new 6ah lifepo for charging phones lights ect.
Can anyone suggest a cheap efficient pmw charge controller?
50 amp solar panel and battery come to 80 bucks so what do I need for a fit for this please?

 

[Willowflowage]

I decided on one for 17 bucks from bougeRV

https://www.amazon.com/dp/B08TWX9SGW/ref=cm_sw_r_cp_apa_glt_fabc_S0G4AVRJEFV77EP8SXSB

which
Should give me a $100 system for my small portable box. The lithium battery with the new controller should meet my phone and ryobi battery charging needs. Any thoughts?

 

[HueyPilotVN]

Nice project.

Just a friendly suggestion.

You might want to put some kind of insulating pad under the inside top of your box to make sure that your battery terminals do not short out with a metal box.

Another minor suggestion would be a fuse in the positive wire between your battery and the outlet.

 

[ChasA]

I noticed the description of that controller stated positive ground. I don't have anything about solar. Better check with one of the solar gurus here.

 

[Willowflowage]

Nice project.

Just a friendly suggestion.

You might want to put some kind of insulating pad under the inside top of your box to make sure that your battery terminals do not short out with a metal box.

Another minor suggestion would be a fuse in the positive wire between your battery and the outlet.

Good advice. It is fused but hidden in the pic. Also it's hard to tell but I have a insulating liner glued in the lid.

 

[HueyPilotVN]

Then you get an A++ from me...LOL

 

[Willowflowage]

I noticed the description of that controller stated positive ground. I don't have anything about solar. Better check with one of the solar gurus here.

Thank you. I noticed this also and read up a little. It sounds like say for an rv if your grounding to the chassis that you'd hook the positive term to the chassis with a positive ground system. With my portable I'm not grounding to anything so it's just hooked up pos to pos, neg to neg. I think that's the deal.

I noticed the description of that controller stated positive ground. I don't have anything about solar. Better check with one of the solar gurus here.

I read up a bit on this,

What is a charge controller with a "positive ground"?

Specifically, what is the difference between these two Renogy 10A charge controllers? They are both identical in appearance, but one is "positive ground".

diysolarforum.com

And I think I'll be fine as it sounds like it shouldn't matter on my ungrounded system which is a portable box. Thanks for pointing it out.