Re: [RE-wrenches] string fusing with 3-channel MPPT inverters

2017-05-26 Thread Brian Teitelbaum
Hi Kirk, Yes that is correct. On a three-input inverter, you could have as many as 6 strings of modules, 2 per MPPT input, and you would not need any overcurrent protection on any of the strings. One of the beauties of inverters with multiple MPPT inputs. Along with the fact that the strings

[RE-wrenches] string fusing with 3-channel MPPT inverters

2017-05-26 Thread Kirk Herander
I'm installing a 3-input SMA 7.7kw inverter. Someone just mentioned to me string fusing, normally required for >2 inputs may not be required since each input has it's own MPPT circuit. In essence treated like separate single MPPT inverters for fusing's sake. I don't believe it, but opinions? Thanks

Re: [RE-wrenches] Canadian Electrical Code question about load side taps

2017-05-26 Thread penobscotsolar
I'll rephrase this and possibly someone has a suggestion. In the Bahamas (they use CEC 2015), they are currently not allowing any load side taps in gentran switches. They suggest including a large, expensive load center with backfed breakers to combine the utility and pv ac output before connecting