The way the deltaQ charger work is simple, no real "intelligence", except dor the protections.
It charge CC-CV, than once the MBB and BMS detect one or more cells reach the max volt o fthe CC-CV, it disable the trigger wire signal ( circuit open) that make the charger to go in the low current mode ( balance current) just enough to equalize all cells and nor overcharge.
It can be done with any other meanwell power supply that have CV and constant power regulation like the RSP serie that limit the power input. You just need one that dont exceed that max power your AC supply can do. and you add a current limiting resistor controlled by a relay that is activated by that trigger wire.
The power supply charge full power and once one or more cell bank reach the max voltage, the trigger enavble the relay that open so the max current is disabled but the balance current continu thru that resistor to finish the equalizing job.
You might have to disconnect the power suply one the battery is full to not stress the cells with thrickle charge current.
you can get these 2000W ( 2500 W measured) RSP-2000-48 mean power supply for about 430$ wich is teh same price as one delta Q of about 950W... and ... the meanwell aere 3 time smaller in volume! so they fit under the seat!
You can also connect them in serie to crank up the voltage to match your battery voltage by adding a reverse current protection diode in parallel with each serie charger. It work with my 3 meanwell RSP-1000-48 !
These work on 100-240Vac so no worrie.
But again, the max power you can put depend on where you connect the "charger" on the battery... and what is the AC power you have access
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