Solar Panel Size To Battery Bank Size
When you pro's talk, having solar panels sized to battery amp size, are you referring to total battery capacity or the 50% useable battery capacity? I am working on my Solar system, I have a total hou...
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full_mosey - This is all on Gary's dime haha... In my case my solar panels would not produce enough current to charge my battery bank using smart mode charging (90% charge state in three hours)
When I start this mode using my on-board converter/charger being run by my generator I immediately see around 52AMPS DC Current being demanded by the 255AH Battery Bank when they are first hit with 14.4VDC. The battery bank will continue drawing this much current for about 15-20 minutes and then start tapering off. After about an hour this DC CURRENT demand is around 8AMPs DC Current. This is also when my on-board converter/charger will switch to 13.6VDC and the current demand then drops down to around 6AMP DC Current.
This would be the time I would to shut down the generator and let the solar panels continue the charge state. Since I can get around 20 AMPS of DC Current from the solar panels the 8AMPs and less DC Current demand would easy for the solar panels to provide for the next two hours of the battery bank charge.
Being new to the solar world I said "switch to" - actually they will all be connected and protected with in-line diodes so I would just turn off my generator and the current demand would just be the provided by the solar panels.
The point here is I can cut back on using the generator after the high current demand has dropped down from the 52AMPS DC Current after a bit. My solar panels would not be able to meet the high current demand.
Keep in mind this is wanting my batteries to get charged up before the end of the day. Just using the solar panels I would be able to see the 20AMPS of C CURRENT for 5-6 hours on average they tell and several hours of this 20AMP source might get my battery bank back to its 90% charge state. But then again it might not. I know I can get to the 50% charge state but having 60AMPS of DC CURRENT available to use with my on-board converter/charger unit.
If I did just left it on SOLAR PANELS only an it did make the 90% charge state before I lost the high sun then I would not need to use the generator at all. I will learn all of that after I use solar panels for awhile.
I know what happens when I am not able to start my evening with less than 90% charge state batteries. They fall back rather quick and it gets dark on me around 10 PM. My battery performance doesn't work well if I start out with less than 90% charge state. This might be different for other folks??? They may have better batteries than I do... My three 85AH Interstate GP24 12VDC Deep Cycle Batteries were installed in 2008.
Does any of this make any sense haha...
Roy Ken
When I start this mode using my on-board converter/charger being run by my generator I immediately see around 52AMPS DC Current being demanded by the 255AH Battery Bank when they are first hit with 14.4VDC. The battery bank will continue drawing this much current for about 15-20 minutes and then start tapering off. After about an hour this DC CURRENT demand is around 8AMPs DC Current. This is also when my on-board converter/charger will switch to 13.6VDC and the current demand then drops down to around 6AMP DC Current.
This would be the time I would to shut down the generator and let the solar panels continue the charge state. Since I can get around 20 AMPS of DC Current from the solar panels the 8AMPs and less DC Current demand would easy for the solar panels to provide for the next two hours of the battery bank charge.
Being new to the solar world I said "switch to" - actually they will all be connected and protected with in-line diodes so I would just turn off my generator and the current demand would just be the provided by the solar panels.
The point here is I can cut back on using the generator after the high current demand has dropped down from the 52AMPS DC Current after a bit. My solar panels would not be able to meet the high current demand.
Keep in mind this is wanting my batteries to get charged up before the end of the day. Just using the solar panels I would be able to see the 20AMPS of C CURRENT for 5-6 hours on average they tell and several hours of this 20AMP source might get my battery bank back to its 90% charge state. But then again it might not. I know I can get to the 50% charge state but having 60AMPS of DC CURRENT available to use with my on-board converter/charger unit.
If I did just left it on SOLAR PANELS only an it did make the 90% charge state before I lost the high sun then I would not need to use the generator at all. I will learn all of that after I use solar panels for awhile.
I know what happens when I am not able to start my evening with less than 90% charge state batteries. They fall back rather quick and it gets dark on me around 10 PM. My battery performance doesn't work well if I start out with less than 90% charge state. This might be different for other folks??? They may have better batteries than I do... My three 85AH Interstate GP24 12VDC Deep Cycle Batteries were installed in 2008.
Does any of this make any sense haha...
Roy Ken
