June 1Jun 1 comment_21114 Good Day, I want to make sure if my calculations are correct. I added a Dyness PowerBlock Max 16kWh battery to the database. Please just check if my Discharge Cycles are correct below: Report
June 4Jun 4 comment_21121 Dear Mark, Thank you for your inquiry. Since you cannot enter 8,000 cycles at 70% EOL (DoD), enter 10,000 cycles at 60% EOL (DoD) (and have the remaining values calculated). Report
June 11Jun 11 Author comment_21158 When I try to change the value at 60% DOD to 10000 and do the Calculate cycles then that value just returns back to the values that it was. Nothing changes. Also please give me the formula to determine a batteries DOD at 60% from the datasheet. Report
June 17Jun 17 comment_21185 Dear Mark, We apologise: for lithium iron phosphate batteries, the reference value used to calculate discharge cycles is not a DoD of 60% (as with lead-acid batteries), but a DoD of 40%. You can simply enter these four values manually: We are still awaiting feedback from our development department regarding the formula. Report
June 20Jun 20 Author comment_21200 Thanks, please share with me as soon as you get that formula. Report
June 23Jun 23 comment_21211 Dear Mark, Thank you for your message. For lithium iron phosphate batteries, the reference value used to calculate discharge cycles is based on a DoD of 40%. This results in the following factors for the discharge cycles: DoD Value 0.2 2.206563 0.4 1 0.6 0.598166 0.8 0.397315 Report
June 23Jun 23 Author comment_21216 Good Day, my question was actually, what the formula is to calculate the battery DOD at 40%. As per below, it does not reflect what you are getting. Report
June 29Jun 29 comment_21244 Dear Mark, Thank you for your message. The formula is correct, but the exponent (0.55) is not a standard constant; it varies depending on the battery type and even within a single battery type. PV*SOL Premium uses a value of 1.3278; this value models lithium iron phosphate batteries with sufficient accuracy. Unfortunately, we are unable to model higher accuracy (using variable exponents). Report
June 29Jun 29 Author comment_21247 Thanks, so in place of the 0.55 constant I must use the 1.3278 constant. Correct? Report
June 30Jun 30 comment_21254 Dear Mark, Thank you for your message. Yes, we confirm that you must use the exponent 1.3278 instead of 0.55. Report
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