Some MPPT Solar charge controllers have the capability of supporting over paneling AND limiting the maximum charge current for the battery below SCC's max limit.
e.g. SRNE (or BougeRV), EPEVER, eSmart
What I mean by over paneling here is utilizing a lower wattage by using a higher wattage PV array (mainly targeting lower sun light conditions)
My question is (generally for over paneling supported + Current limiting capability present SCCs), if we lower the charging current (via it's configuring interface), does it also lower the maximum over paneling limit ?
e.g.
- Say we use a 60A MPPT SCC with 3 times over paneling capability (i.e. if max PV power for 12v is 720W, SCC can safely handle a PV array of up to 800x3=>2160W)
- Then we configure it's max charge current to be 20A (instead of 60A)
Can the SCC still handle a PV array of 2160W ? or does the max limit comes down to 720W (2160/3) ?
[My gut feeling is that it should still be 2160W, i.e. max PV power SCC can handle is NOT dependent on the actual current flown through the SCC. Since a lower current can anyway be present if the battery is fully charged and the load on the battery is low].
Sorry, I know this is a question for individual manufacturer of the SCC. But I am having a difficulty in getting timely responses from the manufacturer of the SCC I am eying on. Hence seeking help from this forum to get at least a generalized answer on this.
e.g. SRNE (or BougeRV), EPEVER, eSmart
What I mean by over paneling here is utilizing a lower wattage by using a higher wattage PV array (mainly targeting lower sun light conditions)
My question is (generally for over paneling supported + Current limiting capability present SCCs), if we lower the charging current (via it's configuring interface), does it also lower the maximum over paneling limit ?
e.g.
- Say we use a 60A MPPT SCC with 3 times over paneling capability (i.e. if max PV power for 12v is 720W, SCC can safely handle a PV array of up to 800x3=>2160W)
- Then we configure it's max charge current to be 20A (instead of 60A)
Can the SCC still handle a PV array of 2160W ? or does the max limit comes down to 720W (2160/3) ?
[My gut feeling is that it should still be 2160W, i.e. max PV power SCC can handle is NOT dependent on the actual current flown through the SCC. Since a lower current can anyway be present if the battery is fully charged and the load on the battery is low].
Sorry, I know this is a question for individual manufacturer of the SCC. But I am having a difficulty in getting timely responses from the manufacturer of the SCC I am eying on. Hence seeking help from this forum to get at least a generalized answer on this.