I just looked closely at the wiring
diagram for the Morningstar TS-45 controller which I am about to purchase
to manage my Aerogen wind generator
, and I realised that it is not quite the "black-box" solution I had expected.
In the manual, the wiring
diagram for the wind generator
with diversion configuration (picture attached) connects the wind generator
straight to the batteries. The regulator
then appears to switch on the diversion load (resistor style heater elements in my case) as required to shed excess power. I suppose I had expected the wind generator
to be connected to the regulator
and the regulator would "divert" excess power from the wind generator as required to the resistors, depending on the calculated state of the battery
Meanwhile I have a Votronic MPPT
420 controller managing the power from the solar panels
, which I am going to assume will account for most of my power generation.
While I felt comfortable with the concept
of the two controllers talking directly to the battery
bank, and being smart enough to handle the variation in input power (let's face it, there are plenty of multi-regulator charging
systems out there today) I am a lot less comfortable with the idea of the wind generator being connected directly to the battery bank and relying on the Morningstar to dump power as needed. Not least because I can see how the power dump might get activated by the Votronic putting solar
power into the system if the two regulators are not in total agreement about the state of charge, float vs bulk vs absorbtion etc. OK, excess power is excess power but I don't want the dump resistors pumping out heat unnecessarily and messing with the brains of the Votronic which has been doing a great job to date.
Any ideas? I'm a bit stumped by this one.