For X1-Hybrid-LV under EPS mode, why the battery charging current is very low?

Please be advised that under EPS mode, The battery charging logic can only charge with a constant current and cannot control the battery voltage, so it can only be charged with a small power. So under EPS mode, the charging current cannot reach the maximum charging current (the charging current is 0.25 times of the maximum charging current). If the charging current is too large, it is easy to cause fluctuations in the battery voltage, PV cannot supply power to the load, and it is also unfavorable to the battery life.