This fall was beautiful as I started this trip and the charging battery was kept full. I also stayed at friends' places and charged the bike battery (I know, not solar and I'm not sure why I cheated). But then the sun went and never came back.
The cooler was fine for quite many days as it uses so little energy but eventually the charging battery was empty. This should not happen as I had set the solar charger to cut power to the consumers when the voltage dropped below a low level. But it still did. I need to check the limits once the system is up again.
The problem now is my solar system has a battery that cuts its power when the voltage drops below 10 V and a solar charger that needs power to charge. (The power coming from the solar cells do no good.) I am stuck.
Of course there is the solution of having a 230 V charger charging the battery. This solution would not work where there is no 230 V, however, so I feel I need a better solution. Is there one?
There could be an extra battery but the lithium 12 V battery I have cannot be coupled in series nor parallell. The option of keeping an extra battery just to use it to power a 230V charger through the 12/230 V converter seems so... brutal. What should I do?
Thanks
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