Is the AP20 legal to ride as a Class 3 e-bike?

It is listed as Class 3, which in most US states means pedal assist up to 28 mph. Its rated 31 mph top speed exceeds that, so check your local rules before riding on bike paths or roads.

How far can it really go on a charge?

AOVOPRO rates the 48 V 18 Ah battery at up to 50 miles. Expect less at high speed, on hills or with a heavy rider, since range drops sharply as you approach the 31 mph top speed.

Can it climb hills with a 750 W direct-drive hub?

Direct-drive hubs are smooth and quiet but produce less low-speed torque than geared motors. Moderate hills are fine, especially with pedaling, but steep sustained climbs will be slow and drain the battery.

How does it compare with a 20-inch fat-tire e-bike?

It is heavier and more motorcycle-like than most 20-inch fat-tire e-bikes, with full suspension and a bigger battery. Those rivals are easier to pedal and carry but usually offer less power and range.

What is included with the bike?

The listing covers the bike, battery and charger. AOVOPRO does not list extras such as a rack, lights or fenders, so plan to add them if you need them.

Is it safe to charge indoors?

No NRTL listing is stated, so the battery and charger have not been shown to meet UL or equivalent safety standards. Charge it on a hard, non-flammable surface and avoid charging unattended or overnight.