PV Charge Control Troubleshooting
Table 4-1 PV Charge Control Problems
Problem | Possible Cause | Solution |
|
|
|
Current uneven between | A. Solar arrays are | A. Check array output. |
multiple controllers. | supplying different | B. Set controllers to the |
| amounts of current to | same settings. |
| each charge controller. | C. Check wiring. |
| B. Charging set points | D. Try a different |
| are not all set the same. | controller if metering is |
| C. Excess voltage drop | unacceptable. |
| in wiring causing |
|
| controllers to measure |
|
| the battery voltage |
|
| differently and regulate |
|
| accordingly. |
|
| D. Accuracy of the |
|
| controllers may vary |
|
| between controllers, |
|
| due to tolerances in |
|
| meter design. |
|
|
|
|
Status LED blinks red | LED may have been | Remove LED and install |
while mode jumper is in | reinstalled backwards. | correctly. “Flat side” of |
“charge control” but still |
| LED should be on left |
regulates normally. |
| side. |
|
|
|
Battery voltage is | BTS is compensating | Nothing - Intended |
exceeding Bulk and | charging voltages | operation. See |
Float settings in cold | based on battery | “Temperature |
weather and not | temperature. | Compensation” on |
reaching settings in hot |
| page 33. |
weather. |
|
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65 |