I know this has been discussed before, but is there any other information regarding the pulse-width modulation methodology that Iota
Engineering uses in its chargers?
I haven't had the opportunity to fully test the two DLS-75/IQ4 3-stage chargers we bought for Beausoleil, other than to say that once I set both the Magnum MS-2800 inverter/charger and the Iota charger
to have virtually identical charging
profiles, I can now verify that I can bulk charge our 800Ah AGM
house bank at around 170 amps (125 amp capacity from the Magnum charger
and 75 amps from the Iota). I haven't yet tested what adding the engine's 190A alternator
to the mix would do...
But back to PWM charging
: I don't have an oscilloscope, so I don't know exactly what the output waveform of the Iota looks like. I assume it's similar to that used by MPPT-style solar
charge controllers - vary the output current
by pulsing at a constant voltage while in the absorption phase. And by closely limiting current
, it can reduce out-gassing without having to use a battery
temperature sensor. It certainly does seem to work - our Magnum inverter
charger will switch from absorption phase to float, and the Iota will continue in absorption for quite a bit longer before it to float. But the engineer
in me wants more details!
Iota's web site is pretty mum on the specifics - I don't think they even mention the PWM capability...