Forum Discussion
BFL13
May 13, 2015Explorer II
Yes the Eco-W only does MPPT in Bulk. Apparently, that is the same with all MPPT controllers IIRC from earlier threads about that.
Mine has Absorb as one of the things it can be in after Bulk, but it always goes straight to Float once my Vabs is reached. So mine actually does the absorption stage while saying Float on the display.
I have to set the Float voltage to be my actual Vabs. Float only goes to 14.5 instead of 15 like Vabs setting, so with mine, as soon as Bulk gets the batts to 14.8 as set for Absorption, it drops to 14.5 to do the actual absorption. There is a reduction in amps to the battery when this happens, which is not the usual taper effect then, which makes it take longer to reach full SOC. This is not a problem with the longer daylight hours, but is with shorter daylight when I would prefer to keep the Vabs up and the amps too.
My Solar30 PWM only has one voltage setting, so once the batts get up to that 14.8 I use, it stays there for the absorption stage and floats there too after that. If I want to actually float with the solar30, I have to dial down the voltage to 13.4 or whatever I pick.
You can do the PWM test with "panel direct" but then you don't have a controller display of amps and volts, so you will need a meter to get your readings.
Mine has Absorb as one of the things it can be in after Bulk, but it always goes straight to Float once my Vabs is reached. So mine actually does the absorption stage while saying Float on the display.
I have to set the Float voltage to be my actual Vabs. Float only goes to 14.5 instead of 15 like Vabs setting, so with mine, as soon as Bulk gets the batts to 14.8 as set for Absorption, it drops to 14.5 to do the actual absorption. There is a reduction in amps to the battery when this happens, which is not the usual taper effect then, which makes it take longer to reach full SOC. This is not a problem with the longer daylight hours, but is with shorter daylight when I would prefer to keep the Vabs up and the amps too.
My Solar30 PWM only has one voltage setting, so once the batts get up to that 14.8 I use, it stays there for the absorption stage and floats there too after that. If I want to actually float with the solar30, I have to dial down the voltage to 13.4 or whatever I pick.
You can do the PWM test with "panel direct" but then you don't have a controller display of amps and volts, so you will need a meter to get your readings.
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