Usefulness Of MPPT Technology
This isn't a trick question. I wish to take a "Short Course" in the reality versus hype of MPPT control... Users who have MPPT and can report real-life experience... Let's say I get a pair of panel...
Forum Discussion
Mex, you talking about this unit here for AC ? LG5000WM
Says 515W and 4.8 amps.
You know you'll have losses along the way, not the least is that your solar panels eventually lose up to 20% efficiency as they get older.
6 or 7% loss at the charge controller, 1 to 2 % with the wiring, another 5 or 6% at the inverter, 10 to 20% at the panels as they age. Loss of capacity at the batteries with age too. Plus resistance to charge as they near top off and generate heat, and fizzies at 15.0V to get them to 14.8 or 29.6V when you need 30 V.
Storage of electricity is killing your efficiency.
Do you see a theme here? Probably the number of panels you really need is X+1 or 2 the number of panels you think you need. 6 instead of 4?
Cut your losses short, pump your watts back on to the grid, and let the utilities store it until you need it back. Run your meter both ways.
Says 515W and 4.8 amps.
You know you'll have losses along the way, not the least is that your solar panels eventually lose up to 20% efficiency as they get older.
6 or 7% loss at the charge controller, 1 to 2 % with the wiring, another 5 or 6% at the inverter, 10 to 20% at the panels as they age. Loss of capacity at the batteries with age too. Plus resistance to charge as they near top off and generate heat, and fizzies at 15.0V to get them to 14.8 or 29.6V when you need 30 V.
Storage of electricity is killing your efficiency.
Do you see a theme here? Probably the number of panels you really need is X+1 or 2 the number of panels you think you need. 6 instead of 4?
Cut your losses short, pump your watts back on to the grid, and let the utilities store it until you need it back. Run your meter both ways.
