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
PT, to clarify, you should get max amps at sun's max altitude, which is close to the time of "noon" where you are. "High noon" iaw.
Your time zone is 15 degrees of longitude wide, with the "time" for that in the middle of the zone. That is, the sun passes that middle meridian at 1200 standard time. and is South of you at that moment (if you are in north lats above where the sun is) (merpas isn't quite the same time as max alt beccause the Earth is spinning, but not important for this)
If you are to the east of the middle, your max alt will be sooner, and if west of the middle later. You can be up to half an hour each way.
When you go to fast time, you adopt the zone time of the zone to the east of yours, so merpas is now an hour later on your clock.
Eg, where we camp in summer, max alt is at approx 1317. If you have an almanac you can work out exact times for merpas for your location, and that will be close to max alt and so max amps.
Or you can use your panel to find max amps and that will show you where South is and the time of high noon where you are.
Of course if your battery voltage gets above 13.5ish before high noon you won't get max amps at noon due to the IV curve on a 12v panel.
Your time zone is 15 degrees of longitude wide, with the "time" for that in the middle of the zone. That is, the sun passes that middle meridian at 1200 standard time. and is South of you at that moment (if you are in north lats above where the sun is) (merpas isn't quite the same time as max alt beccause the Earth is spinning, but not important for this)
If you are to the east of the middle, your max alt will be sooner, and if west of the middle later. You can be up to half an hour each way.
When you go to fast time, you adopt the zone time of the zone to the east of yours, so merpas is now an hour later on your clock.
Eg, where we camp in summer, max alt is at approx 1317. If you have an almanac you can work out exact times for merpas for your location, and that will be close to max alt and so max amps.
Or you can use your panel to find max amps and that will show you where South is and the time of high noon where you are.
Of course if your battery voltage gets above 13.5ish before high noon you won't get max amps at noon due to the IV curve on a 12v panel.
