1. Choosing a brand
Choosing a reputable brand gives you some assurance over quality and the availability of parts and support now and in the future. Many e-bike "brands" aren't really brands at all - they are imported by people who've bought a bunch of bikes off the internet from an unknown factory in China and had a logo printed on them. Often they've specified a couple of standard bike components with their order to claim their product is "designed in New Zealand for our unique conditions". You wouldn't spend $1500 or $2000 on a TV from "John's amazing televisions", nor should you do that with an e-bike.
We see many customers who've purchased a cheap "Alibaba" e-bike that is no longer working. Usually we can't help because the parts are specific to the bike and often the original importer is nowhere to be found.
Bosch motor on Gepida Reptila
Rear hub drive on the Magnum Ui5
German-made Brose motor on Bottecchia Newton
13ah frame mount battery on the Magnum Ui5
500wh Panasonic battery on the Bottecchia Kripton
Magnum Ui5 with throttle & console
Bosch pedal assist control console on the Gepida Reptila
Gepida Reptila 900, a step-through frame for a comfortable, upright ride
Bottecchia Newton, a strong frame for serious off-road use
Shimano Nexus shifting system on a Gepida Reptila
Disc brakes on the Magnum