I just finished installing my 7.2KW solar system , SMA inverter, rapid shut down, Iron ridge racking and JA 315w panels, all permits and fees and parts. $7300.....$3400 after tax incentives from state and fed. Of course my labor was free.
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Shadow from that chimney might be a problem.
Fire Hazards and Overheating Caused by Shading Faults on Photo Voltaic Solar Panel
Free labor is huge. When I had solar systems quoted, I feel like the labor was outlandish, but they justified it by the federal rebates and "reasonable" payback periods. I do hope the labor comes down, feel it should with more competition.That free labor really makes a huge difference in the affordability.
NIce !
That looks almost exactly like the projects the volunteer group I am part of puts up.
One detail though: that exhaust pipe is going to wreck havoc with your generation, particularly in a serial setup. Are you able to monitor output ?
I meant serial, and I was presuming that this array is all in one series.Do you mean parallel? Shading one section of a panel in series should only cut out 1/3 of the panel. However if two strings are in parallel lowering voltage on one string throws off production on the other string forcing it to operate off its MPPT. The great thing about the new SMA inverters is each string can be on its own tracker so shading losses are minimized.
I know the system is not optimal, but the house is not big and has a hip roof. I used all the available space on the southern roof i could. You kind of have to work with what you have. I hopefully oversized it some to compensate for shading. there are 2 strings that have separate MPPT tracking in the SMA inverter. All I can do is hope for the best. The roof faces about 195-200 Deg. south/west. If worst comes to worst I can add another small string on the south/east side later. I will post some figures after the meter is set by the power company. Sometimes it can take weeks. I am waiting for the city inspector as I type this.NIce !
That looks almost exactly like the projects the volunteer group I am part of puts up.
One detail though: that exhaust pipe is going to wreck havoc with your generation, particularly in a serial setup. Are you able to monitor output ?
I know the system is not optimal, but the house is not big and has a hip roof. I used all the available space on the southern roof i could. You kind of have to work with what you have. I hopefully oversized it some to compensate for shading. there are 2 strings that have separate MPPT tracking in the SMA inverter.
Listen to NWDiver and not me, but monitor generation if you can. If the shade cast by the pipe is a big deal you can always remove a panel or two, or place them somewhere else on a separate string.You kind of have to work with what you have.
Impressive sir!I just finished installing my 7.2KW solar system , SMA inverter, rapid shut down, Iron ridge racking and JA 315w panels, all permits and fees and parts. $7300.....$3400 after tax incentives from state and fed. Of course my labor was free.View attachment 304489 View attachment 304489 View attachment 304490
I just finished installing my 7.2KW solar system , SMA inverter, rapid shut down, Iron ridge racking and JA 315w panels, all permits and fees and parts. $7300.....$3400 after tax incentives from state and fed. Of course my labor was free
If that $2.35/watt is before federal tax credit, it is dirt cheap too.That is very impressive, for such a system at just 1000 /kw , whereas the least quote for install I got was $2.35/W.
You should be fine; That's what I really love about the new SMA inverters; the latest version has up to 3 MPPTs. IMO having each string on its own tracker is really all you need as long as every panel on a string is facing the same direction. I've got an old-school single MPPT inverter. If 1/3 of 1 of 42 panels gets shade I can easily lose ~5% since the voltage of the other 2 strings must drop also. If each string has its own tracker you're really only losing the shaded section. String-level optimization is just as effective as module-level at a fraction of the cost.
Have you tested your Secure Power Supply without ANY AC power? We had to rethink how we implement SPS on our inverters due to rapid shutdown. Rapid shutdown needs AC to turn the panels on and with SPS you need DC from the panels to get AC... still trying to figure out the best way around that. Rapid Shutdown with SMA appears to be somewhat of an after thought especially the module level shutdown that's required next year. They essentially outsourced it to TIGO.