General RV Solar Questions?
I'm planning to add a couple of new high end Kyocera 140 panels and build up a new system out of them. Currenly I have what my old 95' Squire 400 came with which is a substandard and smaller panel wi...
Forum Discussion
The test was run with a member here in mind. He pulls 3 grp 24 (225 ah) down to 50% daily and says he is working with 5 hours of light. He needs to do it again tomorrow so this was a test to see what kind of wattage he needed to do it.
The battery and controller were in the garage at around 50f. The controller at least knows what the ambient temp is. The panel was out in the cold giving it a .75a boost from normal.
The Canadiansolar 220w put out 12.75a for 5 hours and by then the 8-D's voltage was only 13.1v, neither was enough to get another 100 or so AH again tomorrow. The 230w poly running at 15-16 a would have been a bit better, the pair of 245w monos running at 32a+ would have at least gotten it back to float. That's the kind of power needed to push the 8-D around in a shorter time period. Throw the 230w in with the 245's for 48a and.....
So I'll change my statement to if you need to replace a lot of AH daily in a limited time, it takes a array big enough to do it. Any under paneling and you will be running a generator, If that's the case you can get away with much less panel. Just run the generator first and let the solar finish the job in float.
The battery and controller were in the garage at around 50f. The controller at least knows what the ambient temp is. The panel was out in the cold giving it a .75a boost from normal.
The Canadiansolar 220w put out 12.75a for 5 hours and by then the 8-D's voltage was only 13.1v, neither was enough to get another 100 or so AH again tomorrow. The 230w poly running at 15-16 a would have been a bit better, the pair of 245w monos running at 32a+ would have at least gotten it back to float. That's the kind of power needed to push the 8-D around in a shorter time period. Throw the 230w in with the 245's for 48a and.....
So I'll change my statement to if you need to replace a lot of AH daily in a limited time, it takes a array big enough to do it. Any under paneling and you will be running a generator, If that's the case you can get away with much less panel. Just run the generator first and let the solar finish the job in float.
