Hi folks.
Trying to avoid an expensive mistake
before finalising my wiring!
having read the battery protect manual i fully get that Vout should not be a higher voltage than Vin. Makes complete sense.
But on the last section of the manual,
It shows 2 battery protects in series where:
The input of battery protect 2 is connected to a charger (MPPT stated)
The output of battery protect 2 is connected to the input of battery connect 1 which is commoned to
Battery bank positive.
The output of battery protect 1 is then connected to the load.
And in one sense that works in my mind - insofar as no input to battery connect 2 Shuts down battery connect 2s output....
But....as the sun goes down....there is no volts on the input to battery connect 2 therefore, at that point in time the output of battery connect 2 is at battery voltage...BUT the input of Battery connect 2 is at zero V (no charge coming in) so at that point you have an "approved" configuration where it seems there is potential to cook battery connect 2 !!??
So ....other than fitting a 60-100A Rated schottky diode on the output of Battery connect 2 so that the battery can never reverse shunt battery connect 2 , how do you stop Batt connect 2 being fried when no charge current is present on its input ?
To my mind the manuals statement and the last drawing are in contravention - which is right please?
Regards
Rob
