Two years ago, the owner of a Toyota HiAce Retreat Anniversary camper van installed a Stage 21 One Cool 21 12V air conditioner. The installation cost approximately 490,000 yen and took one week, with a loaner vehicle provided. The unit can run from both the battery and a direct external power connection. The owner states the device is compact and does not obstruct the interior. Overnight battery operation with a 200Ah capacity is only sufficient if no other appliances (lights, refrigerator) are used. The air conditioner is used for both camping and daily driving. No failures have occurred over two years of use.
