https://envoy.local/production.json gives:
{"production":[{"type":"inverters","activeCount":12,"readingTime":1727961428,"wNow":567,"whLifetime":2463751},
{"type":"eim","activeCount":1,"measurementType":"production","readingTime":1727961444,"wNow":0.0,"whLifetime":0.049,"varhLeadLifetime":1.963,"varhLagLifetime":1395.445,"vahLifetime":10187.493,"rmsCurrent":-0.0,"rmsVoltage":243.464,"reactPwr":-0.0,"apprntPwr":0.0,"pwrFactor":0.0,"whToday":0.049,"whLastSevenDays":0.049,"vahToday":23.493,"varhLeadToday":0.963,"varhLagToday":3.445}],"consumption":
[{"type":"eim","activeCount":1,"measurementType":"total-consumption","readingTime":1727961444,"wNow":-0.714,"whLifetime":-7186.364,"varhLeadLifetime":-0.29,"varhLagLifetime":31.743,"vahLifetime":257393.467,"rmsCurrent":-0.165,"rmsVoltage":243.403,"reactPwr":0.423,"apprntPwr":-40.238,"pwrFactor":-1.0,"whToday":0.0,"whLastSevenDays":0.0,"vahToday":575.467,"varhLeadToday":0.0,"varhLagToday":0.743},
{"type":"eim","activeCount":1,"measurementType":"net-consumption","readingTime":1727961444,"wNow":-0.714,"whLifetime":-7993.991,"varhLeadLifetime":1.673,"varhLagLifetime":1427.187,"vahLifetime":257393.467,"rmsCurrent":-0.165,"rmsVoltage":243.403,"reactPwr":0.423,"apprntPwr":-40.238,"pwrFactor":-1.0,"whToday":0,"whLastSevenDays":0,"vahToday":0,"varhLeadToday":0,"varhLagToday":0}],"storage":
[{"type":"acb","activeCount":0,"readingTime":0,"wNow":0,"whNow":0,"state":"idle"}]}
“wNow”:567 seems to give the current production in Watt…
“whLifetime”:2463751 seems to give an even better cumulative figure as it can be deducted from the prior read out to get the last production in kWh