Recharge and use in parallel with different P

[Mike90250]

Sure, uncertified and unmatched parts off aliexpress com Be sure to contact them when your stuff burns up. I would not bother with it. At the very least the batteries all have to be the same. Just a couple of trash salvaged cells from a dump, in a new heat shrink sleeve, built into the pack, will ruin your day, and hopefully not mine.

[Ginozor]

Too many " IF's "

If the batteries are both the same chemistry, it might work.
If the batteries both have compatible internal BMS, it might work

Short term, you could likely hook it up and it would work. Recharging would take longer, since it's now a larger battery pack and you said nothing about a new charger.

Early failure would not be considered a surprise.

The charger are mppt solar booster CTK-EV-300 , https://www.youtube.com/watch?v=omAhsQqwWSo

[Ginozor]

Too many " IF's "

If the batteries are both the same chemistry, it might work.
If the batteries both have compatible internal BMS, it might work

Short term, you could likely hook it up and it would work. Recharging would take longer, since it's now a larger battery pack and you said nothing about a new charger.

Early failure would not be considered a surprise.

The charger and mppt is this https://www.aliexpress.com/item/E-Bi...48784c4dSx48YW

And this is bms https://www.aliexpress.com/item/E-bi...3da24c4dYzHipz

But the size of cells are different , 10s 3p 26650 adn 10s 8p 18650

[Mike90250]

Too many " IF's "

If the batteries are both the same chemistry, it might work.
If the batteries both have compatible internal BMS, it might work

Short term, you could likely hook it up and it would work. Recharging would take longer, since it's now a larger battery pack and you said nothing about a new charger.

Early failure would not be considered a surprise.

[Ginozor]

Hi everyone , I'm building a solar bike and I would like to connect 2 packs of 36v batteries in parallel, the first is a 10s3p and the second is a 10s 8p. it is possible to use and recharge (mppt booster) at the same time the 2 batteries in parallel ? I have already considered the fact that when I combine the 2 batteries I will bring them to the same voltage.