Artificial light can prematurely age the champagne too, so make sure any artificial lights in the storage space aren’t on for the majority of the time. If you don’t have a windowless room, thick curtains, or cupboard space, you can always cover up the champagne bottles with a thin dark cloth.
The freezer is not a good storage place! Leaving it there will quickly flatten the champagne and make it undrinkable. If there is no basement in your home, invest in a wine rack and place it in a dark area that you can easily keep cool, such as a pantry or a small room with few windows. A cooling unit or thermostat could regulate the temperature of your storage room. A refrigerator isn’t the best solution for long-term storage, as food needs to be kept at colder temperatures than champagne to stay fresh. Under a month is fine, but champagne shouldn’t be in the fridge for months or years.
Using a portable air conditioner and adjusting it according to the season could help to keep the temperature of the storage area consistent. Generally, you can keep a house on the cooler side by using insulated curtains and LED light bulbs, and by using fans to encourage airflow. You can also warm up an area during colder seasons by keeping radiators clear and sealing drafty windows, in addition to the simpler solution of adjusting any home heating systems accordingly. This is why sheds and garages are not ideal for storing champagne. If the temperature fluctuates too much, the champagne won’t last. An area inside your home is much better.
A temperature sensor installed in your storage area can monitor both temperature and humidity. This will alert you to any changes that happen while you’re storing champagne.
This is why storing champagne in the refrigerator is purely a short-term solution, as too much time in the fridge will alter the wine’s flavor.
Extra aging for months or years after you buy champagne can bring out the wine’s more complex flavors. Make a note when you store each bottle so that you’ll know how long you have to drink them. A vintage bottle of champagne has a longer shelf life. It can be stored for another 5 to 10 years after you get it.
Another option would be to stick a metal spoon into the neck of your open champagne bottle. The metal acts as a conductor to keep the bottle (and the champagne) cold, which again helps maintain bubbles.
