Despite my balcony power plant in the backyard and lower electricity consumption, electricity costs keep going up. According to the http://strom-report.de, KWh of electricity costs an average of 34.6 cents. New contracts currently cost as much as 41 cents. It is therefore necessary to think about cost-effective alternatives and to add another module to my existing Balkan power plant. But can I connect 2 different PV modules together at all? Do I need a new inverter for two modules or can I continue to use the two old micro inverters?