10/5/2023 0 Comments Calibre dedrm plugin syntax error![]() Setting Up Sublime Text for Javascript Development Please comment if you know more! We used the kettle in the truck, and it worked, so this calculation is supported by empirical evidence :). Don’t know how serious or not serious that is. ![]() So, even though we only need 16.7% of battery, the rate of consumption takes the battery voltage below 7.2V for (200s - 123.95s) = 76.05 seconds Summaryīoiling a kettle uses 16.7% of battery capacity, but for the last 76 seconds the battery is pushed into operating outside of the designed parameters due to rate of discharge. So the battery can supply the necessary current for 123.95 seconds, but we need 200 seconds to boil the kettle. If we assume a linear degradation of voltage, then time to 7.2V (based on battery’s Cold Cranking Amps (CCA)) at 217.82A draw is: 30s / (217.82A/900A) = 123.95 seconds So, boiling a kettle drains: 11.98Ah / 72Ah = 16.7% of battery However Time to boil: 200s Battery Usage Amount of Energy needed: 2200W * (1h * 200s / 3600s) = 122.22Wh F-150 Battery Voltage : 12VĬranking Amps: 900A (we can safely draw 900A for 30s, with voltage staying above 7.2V) The Kettle Average Power Usage: 2200W ![]() This post documents the calculations for posterity. We were thinking of bringing an electric kettle with us, but we wanted to know if the truck’s battery would be up to the task of boiling the kettle. This question came up when my girlfriend and I were packing for a road trip in our F-150 truck. This post will deviate from computer-related posts and document a life-hack calculation instead.
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