How susceptible to weather, moisture, humidity, dust or sand is the battery you purchase. Where will you want place it in your property.
Only some batteries can operate in outside conditions and even then you have to understand what the temperature range is they can operate within, specifically during extreme cold or heat.
The IP (Ingress Protection) rating of the system is how they are graded for which environment they are suitable for.
Puredrive systems can work both indoors and outdoors.