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I'm new to this forum and new to using solar. I purchased an RV that has a solar system consisting of the following components:
♦ 400Ah of Renogy REGO 12V Lithium Iron Phosphate battery capacity
♦ 2 x 175W solar panels (350W total) with SolarAir™ – Thermal Management solar panel mounting system1
♦ Renogy DCC50S 12V 50A DC-DC On-Board Battery Charger
♦ Renogy DCC50S MPPT 50A combination solar charge controller
♦ Renogy REGO 150A AC Smart Battery Charger
♦ Renogy REGO 3000W 12V Pure Sine Wave HF Inverter
♦ Renogy ONE Core – Monitoring System
On Tuesday I started out with a fully charged battery. Ran it w/o being hooked up to shore power and ran the battery down to 58%. Turned everything off: control panel, Inverter, et. Control panel master switch off. The battery dis-connect switch remained on. After a full day in the Arizona sun it only charged up a few percentage points. Back of the Napkin calculations: Battery is 42% depleted-42% of 5120Wh of stored batter energy would mean that the battery needs 2150.4 Wh to fill back up to 100%. At 80% efficiency-350W solar panels-280W @80% would give me 7.7 hours to charge back up. The systems has been in unobstructed sunlight with clean panels for about 24 hours and the Renogy one core system is saying that it will take about 3 more days to charge up the system. The readout states 3.7 positive Amps coming in. I did call the RV tech and we walked through the following diagnostic steps:
1.) Went through all the controls and switches to make sure there was nothing I missed.
2.) Inspected the roof solar connections. Did not take them apart to check fuses, etc as I need to get a long handled dyke to cut the zip ties, uncoil and pull out to where I can access them.
3.) Removed the jumper between the two terminals of the solar input lines to the DCC50S MPPT. Virtually no voltage measured on the VOM. One leg was .1 to .3V and the other was 0.L readout on the VOM.
4.) The next instruction was for me to disconnect each solar panel and check the inline fuse, the connection and take a Voltage reading on the solar panel output.
I plan on doing the above-didn't have the right tools with me to do it today, But it doesn't seem likely to me that both panels would have either poor connections or blown fuses.
Looking for input on the diagnostics, Other items to look at or check. Hoping it's something simple I missed.
Thanks in advance for sharing your thoughts/knowledge!
Scott
♦ 400Ah of Renogy REGO 12V Lithium Iron Phosphate battery capacity
♦ 2 x 175W solar panels (350W total) with SolarAir™ – Thermal Management solar panel mounting system1
♦ Renogy DCC50S 12V 50A DC-DC On-Board Battery Charger
♦ Renogy DCC50S MPPT 50A combination solar charge controller
♦ Renogy REGO 150A AC Smart Battery Charger
♦ Renogy REGO 3000W 12V Pure Sine Wave HF Inverter
♦ Renogy ONE Core – Monitoring System
On Tuesday I started out with a fully charged battery. Ran it w/o being hooked up to shore power and ran the battery down to 58%. Turned everything off: control panel, Inverter, et. Control panel master switch off. The battery dis-connect switch remained on. After a full day in the Arizona sun it only charged up a few percentage points. Back of the Napkin calculations: Battery is 42% depleted-42% of 5120Wh of stored batter energy would mean that the battery needs 2150.4 Wh to fill back up to 100%. At 80% efficiency-350W solar panels-280W @80% would give me 7.7 hours to charge back up. The systems has been in unobstructed sunlight with clean panels for about 24 hours and the Renogy one core system is saying that it will take about 3 more days to charge up the system. The readout states 3.7 positive Amps coming in. I did call the RV tech and we walked through the following diagnostic steps:
1.) Went through all the controls and switches to make sure there was nothing I missed.
2.) Inspected the roof solar connections. Did not take them apart to check fuses, etc as I need to get a long handled dyke to cut the zip ties, uncoil and pull out to where I can access them.
3.) Removed the jumper between the two terminals of the solar input lines to the DCC50S MPPT. Virtually no voltage measured on the VOM. One leg was .1 to .3V and the other was 0.L readout on the VOM.
4.) The next instruction was for me to disconnect each solar panel and check the inline fuse, the connection and take a Voltage reading on the solar panel output.
I plan on doing the above-didn't have the right tools with me to do it today, But it doesn't seem likely to me that both panels would have either poor connections or blown fuses.
Looking for input on the diagnostics, Other items to look at or check. Hoping it's something simple I missed.
Thanks in advance for sharing your thoughts/knowledge!
Scott