In summers i collect about 50 litres of my air conditioners water. The water is distilled i.e. free of any salts hence ideal to be used as
1. Viper fluid
2. Coolant diluter
3. Lead acid Battery refill
4. Steam iron refill
Using salt free i.e. distilled water has many advantages..,it will not clog up your car's windscreen sprinkler nozzles, used in coolant ensures the water body does not get narrower over time with salt deposits, battery lasts longer, steam iron lasts for ever.
50 litres last all winter and run into next summer.