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EfficientPV ...thanks for your comments. Could you explain your % example a little more....as I'm a luddite here. Is this showing the improvements of your MPPT controller over just plain old direct connect? And what does each column refer to? Would your board work with my system...

Can you comment on how this system is working now that you've had it for a while? Also these comments in the manual put me off. Should I be concerned? It is for heating a cottage where I am away alot especially in the winter. COMMENT 1 "- The regulator must be absolutely disconnected...

2-300watt panels that will be roof mounted 48vdc 1000watt water heating element, but my reading suggests a higher resistence AC element may work better as Panels are rarely working at peak. The infloor system has it's own grid tied electric boiler so I am just trying to preheat the water to...

HI EPV Thank you for your information........I have been reading all kinds of info since your post and have not gotten back to you as I am new to this field. I am convinced an MPT controller type system is required to get the most out of my panels in an unfortunate spot in the world...

I plan to install a 48vdc 1000watt water heating element in an old Rheem 20gal water tank to use as a pre-heat buffer tank for an infloor hydronic system I put in this past winter. The infloor system has it's own electric boiler so I am just trying to preheat the water to save on...