1) Charge time is affected first and foremost by the type of battery.
2) Lithium batteries can "pull" much more charge and much faster than lead-acid or AGM batteries. For example, if you hook up a lead-acid battery to a 600 watt charging source, the lead-acid battery would absorb about 10-20% of that power. Meanwhile, a lithium battery hooked to the same power source would absorb 100% of that power.
3) When charging from a solar panel you have to take into account that the sun isn't always at an optimal angle. This heavily affects how effective a solar panel is.
4) Lithium batteries cannot charge below 0 degrees celcius
This means every day with your expected load, you will use {{ estimatedDailyUsagePercentage.toFixed(1) }}% of your total battery capacity.
Based on your {{this.selectedInput ? this.selectedInput.output : ""}} Watt input, it will take {{ (hoursUntilFullyCharged * (estimatedDailyUsagePercentage.toFixed(1) / 100)).toFixed(1) }} hours to replenish your daily use.