Tesla model S battery

[jager]

Hi, I am in the process of planning an off grid system and am a bit uncertain about the battery capabilities. My goal is to have about 3 days of power backup, using about 15 kw per day. From what I've read, the battery is rated at 85 kwh, but also lists it as a 5.3 kwh battery. Simple question is how many batteries would I need to store the estimated 45 kw of power? More in-depth, can someone explain, or link me to a basic explanation of the difference of the 85kwh rating vs 5.3 kwh? Thanks in advance for any help. And don't worry, I will be hiring an expert in the end, but I want to understand my system before spending the money.

 

[markb]

85 kWh is the pack, which is made up of 16 modules, each 5.3 kWh.

The nominal voltage of the module is around 22 V (+ or - depending on charge state), which is nice and safe (no electrocution risk, but there's still a fire risk). These are wired up in series in the pack, making for about 350 V, which will easily kill you, so extreme caution is necessary when dealing with a whole pack.