@smartie2076 I think it was not the only issue or maybe I am mistaken. Can you have a look with me at the calculation of the annuity? the following is an example:

        "costs_investment_over_lifetime": {
            "value": 234123.56763754043
        },
        "costs_om_total": {
            "unit": "currency",
            "value": 13512.586121289185
        },
        "costs_total": {
            "unit": "currency",
            "value": 481759.72139637003
        },
        "costs_upfront_in_year_zero": {
            "value": 234123.56763754043

costs_total are equal to the sum of the other three. Now, to simplify the example, I will divide by the capacity (209.0389):

costs_investment_over_lifetime = 1,120
costs_om_total = 64.64 (which is 10/CRF -- 10 being o&m and crf = 0.154699)
costs_upfront_in_year_zero = 1,120
costs_total = 2,304.64 which is then multiplied by the CRF to get the annuity_total

is this the way you wanted to calculate the annuity? because I myself feel that there is some redundancy. the current PV LCOE is 0.3 !

costs_total are equal to the sum of the other three. Now, to simplify the example, I will divide by the capacity (209.0389):

costs_investment_over_lifetime = 1,120
costs_om_total = 64.64 (which is 10/CRF -- 10 being o&m and crf = 0.154699)
costs_upfront_in_year_zero = 1,120
costs_total = 2,304.64 which is then multiplied by the CRF to get the annuity_total

Actually, costs_upfront_in_year_zero should not be added to cost_total, as they are included in costs_investment_over_lifetime. This will then decrease the LCOE back to 0.15...

There must be another issue besides this one.