Solar Costs - MPPT vs PWM
The continued lower price of the larger panels has now dropped the MPPT costs just below PWM for a larger RV solar setup. SolarBlvd Cynergy 3x$200 250W panels 750W $600 SolarHome Morningstar MPPT ...
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Jim, I have not seen that at all with my Eco-W and I do use the big inverter at times early in the day after solar wake-up. (That leaves open that I may never have seen the slow way by not using the inverter)
I set mine to 14.8 Vabs, and 14.5 Float(highest float it will do)
I have watched the Eco-W's display several times when battery voltage is approaching the 14.8v set-point and it suddenly says "Absorb" for the blink of an eye and then says "Float" At the same time, wattage and amps readings collapse to the lower voltage and amps product.
The controller is now in PWM. In fact, that controller "Float" is actually while the battery is in its Absorption Stage at a Vabs of 14.5 my "Float" set-point
However, after it drops to "Float" I can now run a load and amps will jump back up but the display still says "Float" (Voltage stays at my Float set point 14.5 but as reduced by the load) ISTR the battery voltage has to drop below 13.2 before it will return to Bulk and MPPT, so there is plenty of scope there for loaded voltage to remain above 13.2 in Float but do extra loads above what is needed to continue with the battery recharge.
I would be happy to be able to kick the amps up in the morning by running the inverter, but need to know more about that trick I guess.
Do you also have to chant something in Navaho? :)
I set mine to 14.8 Vabs, and 14.5 Float(highest float it will do)
I have watched the Eco-W's display several times when battery voltage is approaching the 14.8v set-point and it suddenly says "Absorb" for the blink of an eye and then says "Float" At the same time, wattage and amps readings collapse to the lower voltage and amps product.
The controller is now in PWM. In fact, that controller "Float" is actually while the battery is in its Absorption Stage at a Vabs of 14.5 my "Float" set-point
However, after it drops to "Float" I can now run a load and amps will jump back up but the display still says "Float" (Voltage stays at my Float set point 14.5 but as reduced by the load) ISTR the battery voltage has to drop below 13.2 before it will return to Bulk and MPPT, so there is plenty of scope there for loaded voltage to remain above 13.2 in Float but do extra loads above what is needed to continue with the battery recharge.
I would be happy to be able to kick the amps up in the morning by running the inverter, but need to know more about that trick I guess.
Do you also have to chant something in Navaho? :)
