> LUMPINV is shown in the period in that the construction starts (e.g. one period before the period of commissioning year)
No. LUMPINV and INSTCAP are reported for the commissioning period. The vintage index is also reported, and so you should see the vintage being different from the period in such a case.
> all the annual investment payments are just discounted to the beginning of the commissioning year k associated to each payment stream, right
Yes. In effect, this means that in the case where no ILED and no NCAP_DISC is specified, LUMPINV divided by the installed capacity will be equal to the average NCAP_COST defined for the years k of each stream (and if NCAP_COST is constant, then you would even get LUMPINV = NCAP_COST × VAR_NCAP).
No. LUMPINV and INSTCAP are reported for the commissioning period. The vintage index is also reported, and so you should see the vintage being different from the period in such a case.
> all the annual investment payments are just discounted to the beginning of the commissioning year k associated to each payment stream, right
Yes. In effect, this means that in the case where no ILED and no NCAP_DISC is specified, LUMPINV divided by the installed capacity will be equal to the average NCAP_COST defined for the years k of each stream (and if NCAP_COST is constant, then you would even get LUMPINV = NCAP_COST × VAR_NCAP).