The son of the previous owners of my dad’s van used a Permobil power wheelchair, and they had installed a Permobil-specific EZ Lock system on the floor of the van. It’s simplicity itself: there’s a bracket on the van floor; a bdocking base attached to the bottom of the power wheelchair clicks into the bracket.
Hmmm . . . maybe I should say that using it is simple. Installation is probably another matter.
An alarm system confirms when the chair is docked correctly, or warns that it needs to be re-secured. Brackets vary, depending on the type of wheelchair used, and probably require dealer installation owing to drilling, heavy-duty bolts, and electrical requirements. The bracket is released electronically, but there is a mechanical emergency release, too
EZ Lock also offers a docking system for manual wheelchairs, but I’m guessing from the illustration that stabilizing the chair sufficiently to use a dock means that it no longer folds.
One caveat: We discovered that my dad didn’t have the fine-tuning skills that would allow him to dock his power chair in this kind of base — something you’d want to consider before buying one for the chair you own. There just wasn’t any safe way for me to maneuver his power chair with him in it, so I couldn’t dock it either. We use a manual chair when he goes out. For information about how we secure it, see Buying a Used Accessible Van, Part 8 — Securing the Wheelchair.