I’m having a little challenge with a quotation I’m having from my supplier over a battery bank and standby time they’re promising.
The load profile of these two installation average 4.5kW and 3kW respectively. And the battery banks 12V 250Ah x 35pcs(8750Ah) and 12V 250Ah x 26pcs(6500Ah) all for at least 10hrs with batteries DOD of 50%.
I raised raised doubts about how that would be possible and their response was that, I should consider the battery’s voltage of 12v and multiply it with the ampere-hour to get the total KWh of the bank which then becomes 105kwh and 78kWh respectively.
Will I be safe going by these method of estimating the bank please? I will not want to embarrass myself after the installation. Thanks.