obus Posted April 18, 2016 Share Posted April 18, 2016 http://m.aliexpress.com/item/32592016864.html?aff_click_id=5e87a766d35e48bbbfd71a5cdfba3334-1461008036097-09754-nquENfe&aff_platform=y Hello, I bought a 260w MCM4 and think how to expand to 520w in the future. This product Aliexpress need or can do? Thank you Link to comment Share on other sites More sharing options...
Tomek Posted April 18, 2016 Share Posted April 18, 2016 no idea what that is, but looks unnecessarily expensive. you just need a splitter for discharge wires: http://m.aliexpress.com/item/32587938790.html?aff_click_id=f9f964c936e34671af2cc93bea3e5615-1449873717245-04473-3yE3aame&aff_platform=y you'll also need a splitter for charge wires, but that you'll probably need to make yourself by soldering together two male and one female wire like those: http://m.aliexpress.com/item/32578493820.html?aff_click_id=f9f964c936e34671af2cc93bea3e5615-1449873717245-04473-3yE3aame&aff_platform=y Link to comment Share on other sites More sharing options...
Keith Posted April 18, 2016 Share Posted April 18, 2016 1 hour ago, obus said: http://m.aliexpress.com/item/32592016864.html?aff_click_id=5e87a766d35e48bbbfd71a5cdfba3334-1461008036097-09754-nquENfe&aff_platform=y Hello, I bought a 260w MCM4 and think how to expand to 520w in the future. This product Aliexpress need or can do? Thank you I agree with @Tomek, what ever electronics are in that unit I don't think you need them. If it stops a rush of current if you connect a discharged pack to a charged one it might be useful, but as long as you ensure both packs are at the same charge voltage when you connect them a simple Y-lead like is is all you need: http://www.hobbyking.com/hobbyking/store/__10265__XT60_Harness_for_2_Packs_in_Parallel_1pc_.html It makes sense to connect the charge leads in parallel as well, I'm not sure what charge lead the MCM4 uses, if it is as Tomek shows then you will probably will have to make it yourself, if it uses deans plugs then this should do it: http://www.hobbyking.com/hobbyking/store/__14524__T_Connector_Harness_for_2_Packs_in_Parallel_1pc_.html Link to comment Share on other sites More sharing options...
Chriull Posted April 19, 2016 Share Posted April 19, 2016 And "Input Voltage: DC 0-60V (suiltable for 48V or less Voltage Lithium Battery)" is not enough for EUC Battery Packs... Link to comment Share on other sites More sharing options...
obus Posted April 20, 2016 Author Share Posted April 20, 2016 In a video I found on a factory EUC, a battery is connected to the other and is to the motherboard. I guess it is best to ask the seller. Link to comment Share on other sites More sharing options...
Tomek Posted April 20, 2016 Share Posted April 20, 2016 12 minutes ago, obus said: In a video I found on a factory EUC, a battery is connected to the other and is to the motherboard. I guess it is best to ask the seller. it's just a way to wire it that saves one pair of plugs, even in such case the actual connection is parallel (i.e. "forked", like with a simple splitter cable). a serial connection (input of one battery connected to output of the other) wouldn't make sense : it would result in 135V output and fry the controller. btw. sellers in China are not that great in communicating technical details (including understanding your question well), so there is a chance you'll get a very wrong answer... just saying Link to comment Share on other sites More sharing options...
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