Solar Panel Parallel question...
Hi Folks, A while back I ditched our standard charger converter and have been running g off of a Sunsaver 15 amp mppt driving by a 24V dc power supply (which was ok'd by morningstar). I did this d...
Forum Discussion
Solar voltage well not be exactly 24v
Example the working voltage of the typical 100w panel is just under 18v
With an open circuit voltage of 21~22v
If connected in parallel at night, the panels will be drawing power from your 24v power supply , a parasitic load on your nighttime shore power charging
This is Not reverse flow from the controller, that does not happen
This is flow from a power supply into a solid state device ( your solar panels )
Because the panels are not producing power
I recommend
A second controller, with output connect to the batteries
Also what happens when you have shore power and the sun comes up
the two together might overload your 15amp controller
Example the working voltage of the typical 100w panel is just under 18v
With an open circuit voltage of 21~22v
If connected in parallel at night, the panels will be drawing power from your 24v power supply , a parasitic load on your nighttime shore power charging
This is Not reverse flow from the controller, that does not happen
This is flow from a power supply into a solid state device ( your solar panels )
Because the panels are not producing power
I recommend
A second controller, with output connect to the batteries
Also what happens when you have shore power and the sun comes up
the two together might overload your 15amp controller
