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Photovoltaic panels have high current but generate electricity very slowly
If your panels aren't producing any electricity when you'd expect them to, it's most likely a fault with the inverter or problem with the wiring. Occasionally the generation meter might fail. [pdf][FAQS about Photovoltaic panels have high current but generate electricity very slowly]

Does Deye make photovoltaic inverters
Deye, a manufacturer of photovoltaic system inverters, is devoted to a number of supporting industries, including the manufacture of electronic PCBs, moulds, and injection moulding machines. [pdf]
What is the voltage of photovoltaic series inverter
A solar inverter or photovoltaic (PV) inverter is a type of which converts the variable (DC) output of a into a (AC) that can be fed into a commercial electrical or used by a local, electrical network. It is a critical (BOS)–component in a , allowing the use of ordinar. Input voltage (Vcc): this value must be equal to that of the battery (12, 24, 48 V). Output voltage (Vac): this value must be normalized (230 Vac). [pdf]
Will connecting photovoltaic panels in parallel increase voltage
When connecting solar panels together in parallel, the total voltage output remains the same as it would for a single panel, but the output current becomes the sum of the amperage of each panel. [pdf][FAQS about Will connecting photovoltaic panels in parallel increase voltage ]