In comparison to motor-driven locks (note: all Metra locks are motor-driven), solenoid locks have good holding but rather poor pulling force (force to power ratio). This makes them sensitive to vibrations, e.g. door slams, and also causes difficulties in proper functioning when there is too much force (tension) on the door from the inside (e.g. a large bag inside a locker).
If by “best” you mean the most convenient way/technology for users to operate lockers, then we would suggest WiFi/4G, for a number of reasons With WiFi/4G electronic lockers can be opened from anywhere (yes, anywhere in the world where your mobile phone has a network signal). Secondly, a user interface is not required to open lockers which a) saves you money, and b) enables the visual appearance of locker installations to stay intact or “clean” (no RFID readers).
The second best option in our opinion is using Bluetooth, whereby lockers can be opened when users are just a couple of metres away from a Bluetooth user interface/reader, still within range of a Bluetooth signal.
NFC (Near Field Communication) doesn’t really provide “remote” locker usage as users have to be within 4cm of a NFC user interface, which is basically the same as with normal RFID cards.
Additionally, Wifi, 4G or Bluetooth technologies are all included in every new smartphone on today’s market, which isn’t always the case with NFC.
In short: Yes. However, it is necessary to choose an open/close combination. Metra electronic locks have three open/close modes or combinations to choose from, depending on your locker installation requirements and needs:
The first two modes do not require locker doors to have handles.
For multiple small offices we suggests the Metra individual locking solution, where each locker is opened directly on a locker door (a Metra electronic lock with a built-in RFID reader). Perhaps a combination of existing RFID employee cards (if your company already uses these) and the MyMetraKey app as a ‘backup’ locker key, or the MyMetraKey app as the sole locker key for even easier and remote use of lockers.
Yes. Each Metra electronic lock can be mounted on the left (right door hinges) or on the right side (left door hinges), which suits you best. “Z” shaped 2-tier lockers actually open to the left (left door) and to the right (right door).
The majority of new smartphones need 1A of power to recharge, whilst tablets require even more, ca. 2-2.5A. Some locks do have a built-in USB charger, but they normally provide only up to 500mA of power. This means that it takes a long time to recharge devices, plus there is a certain electric risk if too many users try to charge their phones and tablets on the same locker installation/electrical grid at the same time. A separate cabling for charging purposes is probably a better (and safer) solution.