Handy solar info for lead acid batteries
Handy Bob
Forum Discussion
No, I'm not talking about 10% reduction in power. I'm talking about close to 100% reduction.
We've been over this already.
This chart doesn't have a voltage scale. Let's say the point where the two curves cross is at 14.5V. The panel outputs 10A in pwm mode. The cable voltage drop is 0.3V. When the battery gets up to 14.2V, current starts to back off from 10A and falls off the cliff. The bigger the cable, the greater the battery voltage gets before current falls off the cliff.
That's just an example with made up numbers. Get the PV voltage temperature coefficient spec for real quantities.
We've been over this already.
This chart doesn't have a voltage scale. Let's say the point where the two curves cross is at 14.5V. The panel outputs 10A in pwm mode. The cable voltage drop is 0.3V. When the battery gets up to 14.2V, current starts to back off from 10A and falls off the cliff. The bigger the cable, the greater the battery voltage gets before current falls off the cliff.
That's just an example with made up numbers. Get the PV voltage temperature coefficient spec for real quantities.
