Power Inspired offer a comprehensive range of products for door access applications and we always recommend sine wave units. This is because a motor simply isn't designed to work with a non-sine output product. That said, we supply a lot of VIX series product to the door industry, particularly the heavy duty VIX2150 and they do seem to work just fine however, the long term implications of this for a motor are unclear. Hence our position is always if in doubt, choose a sine wave product. The VIS2000B is a popular choice due to its high capacity of 1400W and 2x10Ah internal batteries.
What's more the very nature of door access applications do have very particular problems when it comes to UPS. The first one is that the power to doors may be deliberately cut, for example in a factory unit where the power to a whole bay is disconnected for energy saving reasons, or to a remote outbuilding for security reasons.
When this happens the UPS will immediately revert to battery operation and may stay in this state for hours or days, slowly discharging the batteries to the point where they possibly cannot be recovered. What's worse is that when power returns the unit will not start as the batteries are too depleted to activate the internal circuitry. This is the reason we developed the GATEWAY. It has an internal bypass, meaning that when the unit is inactive due to being switched off, a fault, or depleted batteries, that power will always be available at the output terminals. Secondly, the unit is not designed to be left on, it is designed to be activated only when required. The front panel DIN socket can be connected to a remote key switch, or a wireless relay powered by a regulated 12V output from the unit. The unit will then switch on, and will switch off after 2 minutes - a feature designed to ensure that the unit won't be accidentally left on.