I am designing my battery bank but I'm kinda confused :'( so I need you guys to help me. I did some research online on how to calculate sizing the correct battery bank for your system and almost every website had similar steps/instructions, but then I stumbled upon a pdf file from xantrex saying that whatever amp hour is required for your daily load after you add inverter efficiency which is normally 85% and discharge limit on battery which is a recommended 50% max depth of discharge you should also multiply the daily amp hour requirement by 2 to compensate for the fact that in case you have a in-rush load(s) on the system, meaning that instead of running some loads at the preset time you normally run them this time you decide to run all your required loads at the same time, which normally is not the case in a average household. Doing this would put more stress on the system and when you multiply the daily amp hour requirement by 2, the battery bank will be able to can sustain all the loads at once running each of them at the required time that they normally runs at.
Is this theory correct?
If the theory is correct does that mean that if I decide to have a 3 day or 5 day backup(days of autonomy), after I sized my battery bank would I still have to multiply the total batteries by 2 to compensate for the fact that in case I decide to run all loads at once running them at their required time daily and doing this method for each of the backup days?
Or this theory just applies to a one day backup? because when you configure the battery bank for a 3 day or more backup it would be quite large so it can withstand the in rush loads(stress) on the systems with each load running at the same time for each of the backup days?
Is this theory correct?
If the theory is correct does that mean that if I decide to have a 3 day or 5 day backup(days of autonomy), after I sized my battery bank would I still have to multiply the total batteries by 2 to compensate for the fact that in case I decide to run all loads at once running them at their required time daily and doing this method for each of the backup days?
Or this theory just applies to a one day backup? because when you configure the battery bank for a 3 day or more backup it would be quite large so it can withstand the in rush loads(stress) on the systems with each load running at the same time for each of the backup days?
Comment