Hi I'm thinking about building a small solar panel to recharge a 12V, 7Ah sealed lead acid battery.
I want to reduce the cost by avoiding the charge controller.
I'm thinking about using 30 cells, 300 amp each.
This will give me about 15Volt Vcc, so the maximum power(mp) will be less than that. Lets assume that Vmp is around 13.5 volt that means the battery voltage will never be more than 14V. Therefore there is no possibility to overcharge the battery.
The idea is to use a panel that will never reach the overcharging volatge of the battery.
What do you think about this idea?
JRN