Posted in the Solar Energy Forum
#1 Sep 18, 2013
OK, so i got 10ea. Sharp Solar ND-250 HAT Modules. What next? Im wanting to have a grid/off grid system that will charge my batteries(future purchase) then send power to grid. Once the grid goes down my inverter comes on. Im not wanting to run my entire house at this time, just 2 refigeraters, TV/SAT, and a few lights. I do plan to get 10 more panels and expand once I have my head around this. I suppose my next step in a charger/inverter combo, but not sure which ones to consider,
#2 Sep 19, 2013
There are basically three types of solar PV systems. The grid tied system with no battery backup is the most bang for the buck. Then there are grid tie systems with battery backup, but if it is grid tied, if the power fails, then the inverter(s) will also shutdown to prevent back feeding into the grid. Then there's off grid. Schneider formally Xantrex has the XW6048 system that can be programmed to be a grid tie, grid tie with battery back up and off grid. I believe there are other manufacturers that have the same options. There is the Radian, haven't seen an offering from Fronius, but have heard they have or will have a multi-programmable system also.
The grid tied panel and micro-inverter systems are less susceptible to shading and are set up to monitor over the internet. They are less prone to mass failure like string type panels connected to one large inverter. With the internet monitoring, one can troubleshoot problems with single panel and micro-inverter combinations. You can also add one panel and one micro-inverter at a time to increase the system size in small increments.
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