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
BFL
I'll have to wait to see what using 70ah is like until I get more battery to store it in. Till then 45ah is 50% of our TTs battery and we haven't even seen that yet. It is nice to have a similar sized system to compare it with.
The sites so far have been big, open and I can park however I like. Point the nose south and lay the panel flat 25 ft beyond that and I may be set. We rarely see anyone at all in the area and never near the camp. I have thought about mounting it on the Expeditions roof rack. It could be secured up there against theft and wind. Like yours, it will be on the bed in between times.
Jim
Are you thinking of two 12v panels? I think someone posted the advantage in MPPT wasn't as big as with high voltage panels but there should be some advantage.
There was also a PWM controller posted that could handle panels like mine. With it I would see 7-8a instead of 13-15a I do now.
The controller doesn't allow for switching charging modes. The closest thing to a accurate comparison is when the controller switches to absorb mode and you see the full PWM amps. In my case it went from over 14a in bulk/MPPT to 7.7a in absorb/ PWM. Soon after the batteries voltage rises more and the amps are tapered so you have to catch it as it switches.
It will use PWM to charge in bulk mode but only if the voltage of the panel isn't high enough to activate the MPPT function.
edit
I was able to tell when the MPPT was functioning today. I was using a 12v RC starter to control the voltage of a old battery. When the MPPT turned on, the RPM of the starter kicked up noticeably.
I'll have to wait to see what using 70ah is like until I get more battery to store it in. Till then 45ah is 50% of our TTs battery and we haven't even seen that yet. It is nice to have a similar sized system to compare it with.
The sites so far have been big, open and I can park however I like. Point the nose south and lay the panel flat 25 ft beyond that and I may be set. We rarely see anyone at all in the area and never near the camp. I have thought about mounting it on the Expeditions roof rack. It could be secured up there against theft and wind. Like yours, it will be on the bed in between times.
Jim
Are you thinking of two 12v panels? I think someone posted the advantage in MPPT wasn't as big as with high voltage panels but there should be some advantage.
There was also a PWM controller posted that could handle panels like mine. With it I would see 7-8a instead of 13-15a I do now.
The controller doesn't allow for switching charging modes. The closest thing to a accurate comparison is when the controller switches to absorb mode and you see the full PWM amps. In my case it went from over 14a in bulk/MPPT to 7.7a in absorb/ PWM. Soon after the batteries voltage rises more and the amps are tapered so you have to catch it as it switches.
It will use PWM to charge in bulk mode but only if the voltage of the panel isn't high enough to activate the MPPT function.
edit
I was able to tell when the MPPT was functioning today. I was using a 12v RC starter to control the voltage of a old battery. When the MPPT turned on, the RPM of the starter kicked up noticeably.
