Troubleshooting
If the LED Indicator will not light, or displays an indication not listed in this manual:
• Verify correct battery polarity;
• Check that there is a solid electrical connection to the battery;
• Check that battery voltage appears on the GVB-8-WP battery cables.
The GVB-8-WP will not operate without a battery. If the system appears to be overcharging or the GVB-8-WP will not begin charging, ensure that the solar panel is wired only to the GVB-8-WP.
If the GVB-8-WP does not appear to be charging, note that the GVB-8-WP waits up to one minute before trying to restart if is has shut down due to lack of power from the solar panel. If the
LED indicator will not light with a battery connected, or blinks the over-battery-voltage error, or the controller does not charge, the fuse may be blown. The GVB-8-WP fuse is located in a black
waterproof in-line fuse holder in the positive battery line. If the fuse is blown, replace it with a 10 A fast-acting ATO or ATC fuse rated for the maximum battery voltage. Automotive-style fuses
are typically rated to 32 V, and are suitable for the GVB-8-Pb-12V-WP, GVB-8-Pb-24V-WP, GVB-8-Li-14.2V-WP, and GVB-8-Li-28.4V-WP. For versions 36 V and 48 V nominal, a fuse with a higher
voltage rating is required. We recommend Optifuse part number APR58-UL-10A, rated 10 A / 58 V. For more in-depth system troubleshooting, please visit the support area of our website:
https://sunforgellc.com/learning-center.
Specifications:
Rated Panel (Input) Current:18 A
Minimum Panel Voltage for Charging: 5 V
Minimum Battery Voltage for Operation: 9.5 V
Trickle Charge to Recover Dead (0V) Battery: Yes
Maximum Input Panel: 60 V
Recommended Max Panel Voc at STC: 50 V
Input Voltage Range: 0-60 V
Maximum Input Short Circuit Current:28 A
Maximum Input Current:315 A
Operating Temperature: -40 °C – 85 °C
Maximum Full Power Ambient: 50 °C
MPPT Tracking Speed: 15 Hz
Environmental Protection: IP68, Waterproof
Connection:4Flying Leads, 12 AWG tinned wire, pre-stripped
GVB-8-WP, All Models
Note: The most common causes of blown fuses are:
• Connecting the GVB-8-WP to the battery backwards;
• Shorting the solar panel input while the GVB-8-WP is charging. In this case,
there may be internal damage to the controller.
(1) Panel ratings have increased since we designed the GVB-8-WP. Although we don't believe in changing specications without a corresponding engineering change, based on both our customers' experiences over the years as well
as the headroom we designed into the GVB-8-WP, we feel comfortable recommending the GVB-8-WP for panels with Imp up to 9 A.
(2) Panel Isc. Maximum input power and maximum input voltage requirements must also be respected.
(3) Maximum current that the controller could draw from an unlimited source.This specication is not intended for determining PV input.
(4) Starting from S/N 188100, ying leads are 12 AWG instead of 16 AWG. For the previous version, please refer to manual revision 6.0 | 2021.
