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Hi. As far as I understand the electronic circuitry, the absolute majority (if not all) of modern electronic power supplies have a rectifier at the entrance, converting the AC from the grid to DC. Then its built-in inverter turns DC back to high-frequency AC in order to use a tiny ferrite-based...

The proper "commissioning" of Sunny Boy SMA SB7.7 or turning it on after the maintenance is connecting the AC, and then turning on the DC solar disconnect switch. That's according to the instruction. If I do that early morning or late afternoon when the sun is low, there are no issues, and the...

I'm trying to add battery storage (highlighted in yellow on the screenshot below) to my existing grid-tied solar installation with the primary goal to mitigate demand fees during peak time. You can see that discussion in a separate topic...

Hi. I'm from Phoenix, AZ with 12.96kW grid-tied system up and running. It has 5 strings of panels and two SMA grid-tied inverters working in parallel. They are AC coupled before solar meter. It's a standard design recommended by SRP (utility company) published on their Web-site I'm on "Customer...

SMA Sunny Boy inverters SB7.7-1SP-US40 and SB6.0-1SP-US41 have a "Secure Power Supply" (SPS) component, which can be wired to a separate SPS outlet. It can provide up to 2kW of 120V AC power in SPS mode in case of a grid failure. In such a case, it must be manually activated via an SPS switch...

Which affordable software can be used for designing of site plans and 3-line diagrams similar to those in attached samples? "AutoCad Electrical" would be ideal. But it's very expensive and it gives only 30 days of free trial period. I doubt it's possible to learn such complicated package within...