Tuesday, Feb 12, 2019 at 11:18
Frank P
Are you sure the load runs from the panels before the regulator?
If it did, the voltage to the load terminal would be fluctuating at the PWM frequency and therefore, changing from around 0.6 above battery voltage to near the 22v which is open circuit of the panel. A constant regulator cause change of close to 10v sometimes. Not sure fridges would like that sudden over voltage fed to their electronic circuits.
I have an Ecoworthy MPPT regulator and it has a section which can be set to turn load on and off at programmed times. Some others turn off load at set times after
solar/sun is not happening. I think the battery is connected to the load terminals for load use, but the regulator wouldn't be supplying the load first and then the battery.
Because the MPPT part is effectively an inverter, there is no direct connection from panel to load terminal at all under MPPT mode. PWM is used for absorb and float. I imagine very similar situation in a PWM regulator too. ALL regulators and or chargers in vans or battery chargers simply change their output amp and voltage to siut the battery condition. If a fridge is present and running it simply adjusts to it. An alternator is a vehicle does the same. A DC/DC charger does too.
I cannot see any advantage in running a fridge off the load. Happy to discover otherwise.
Thousands of people have
solar, reg and battery with fridge running off a direct to battery as Boris has, they all work properly.
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