How to make battery controller with arduino?
After night of researching, i seems to figure out correct schematics for this by myself. Haven't tested this yet, but theoretically it should work. Only requires that N-mosfet gate open voltage is below +4 Vgs, and P-mosfet open is near -10 Vgs. Illustration is as following:

PS. For mosfet models seems i have to hunt powerful low-Rds models in TO220/247 cases, to diminish heat waste, because 0.2C charge current for 200Ah battery could be 40A. Something like IRF4905 P-FET should fit the task. Charging would require 550-600W charger and for P-FET with Rds=0.02Ohm, Vdrop would yield 0.8V and 30-35W would be dissipated as heat. And any cheap, even low power TO-92 N-FET, that opens somewhere at Vgs +2..+4V to control -10V P-FET's gate from +5V arduino PWM signal.