Eco-worthy 20a MPPT controller
Last month I purchased the Eco-Worthy 20a MPPT controller from their website for $89 plus $24 shipping. Right now it says $102.50 and free shipping. You can see them on ebay with free shipping and if ...
Forum Discussion
My Ouiji board says the battery would accept 14a continuous to about 85% SOC at 14.4v, then amps must taper while voltage is held at 14.4.
If voltage is dropped to 13.6 at the same time as amps begin to taper from that, then amps will drop instantly to say 10a and taper from there instead of tapering from 14 (and take much longer to get the battery to 100% with the lower amps since being at 85%)
So IMO your battery is somewhere over 85% SOC and will take a good while yet to be "charged."
This is where it becomes a contest to get as much into the battery as possible before dark, where solar amps are so low compared with generator/charger amps.
The usual tactic when days are short or whenever the math isn't right, is do some gen/charger at high amps in the morning to get the SOC up quickly, and then use the low amp solar the rest of the day to get as close to being "charged" as will happen.
You can juggle how much gen time will be enough to get the SOC up enough so solar can finish the job in the remaining daylight. Of course supper, and hitting the batts for that job, comes along before dark in the summer, so you really want to get the batts up as high as you can before supper. Any light after supper is nice but doesn't count for much because now you have a movie going.
If voltage is dropped to 13.6 at the same time as amps begin to taper from that, then amps will drop instantly to say 10a and taper from there instead of tapering from 14 (and take much longer to get the battery to 100% with the lower amps since being at 85%)
So IMO your battery is somewhere over 85% SOC and will take a good while yet to be "charged."
This is where it becomes a contest to get as much into the battery as possible before dark, where solar amps are so low compared with generator/charger amps.
The usual tactic when days are short or whenever the math isn't right, is do some gen/charger at high amps in the morning to get the SOC up quickly, and then use the low amp solar the rest of the day to get as close to being "charged" as will happen.
You can juggle how much gen time will be enough to get the SOC up enough so solar can finish the job in the remaining daylight. Of course supper, and hitting the batts for that job, comes along before dark in the summer, so you really want to get the batts up as high as you can before supper. Any light after supper is nice but doesn't count for much because now you have a movie going.
