In layman's terms (and I'm a layman): Not if the voltage is not high enough to push the amps into the battery. It is like filling a tire to 65 psi with a compressor only putting out 70 psi (takes forever), versus a compressor putting out 140 psi. Volts are pressure, amps are volume or quantity. Both are needed to put a charge back into a battery.
Further, charging at 13.x volts will lead to sulfation. Sulfation gradually diminishes the capacity until the battery is shot. The battery needs 14.4v charging, give or take, to remove each usage cycle's accumulation of lead sulfate from the plates and fully recharge it.