BFL13 wrote:
GordonThree wrote:
BFL13 wrote:
GordonThree wrote:
LOL at the bong in one of the inverter pictures on fleabay
that powermax is interesting, could make my own hybrid inverter system without having to swap my Magnum for a Magnum Hybrid.
Not sure what is meant there. I have had a PowerMax 100amper and a 2000w inverter mounted together for four years now, but I have not used the charger to support the inverter.
I have done PT's trick when on 15a shore power, to put the MW, etc on the inverter and just plug the rig with its Parallax 7355 converter into the shore power. That keeps the big 120v things- only run occasionally- from popping any breakers while the converter gets the batteries back up afterwards in between when the big things are on.
BTW, since that older PM3 (which can be found at a lower price than that at times) PowerMax now has PM4s and Randy at bestconverters has his own version of those he calls Boondockers. There is also a manually adjustable voltage version.
That's pretty much it... instead of swapping my MS2812 for an MSH3012... I could add the powermax directly to the batteries, and power it directly from a yamaha 2000. this way the RV stays on the inverter, and I can run loads too big for the single yammy to handle. cyclic loads such as dehumidifier or air conditioner don't draw 15 amps continuously, so once the battery bank starts the load, the generator should be able to carry it.
Be aware that even an ordinary 55a converter acts differently when "backing up" the battery under load from a big inverter draw from how it does when charging a battery (with its increasing R and reduced voltage spread between charger and battery as the battery charges up to ever higher voltage).
My 13.8v single voltage 7355 does 56 amps constant when acting as a power supply to the batteries that are being drawn at 100a or whatever over 56a by the inverter ( I have improved the converter battery paths to a very low R)
So you don't need a 100a charger for that job unless you are short of generator time and not on shore power when running the big 120v loads on the inverter. Your "usually lame at battery charging" converter, will do quite well in that "back up" role instead. (If your wiring is low R)
I use the 100amper when the batts get down and I plug the trailer into the gen instead of the inverter so the rig is on converter for 12v. Then I plug the 100amper into the gen to recharge the disconnected batts so they have no load on them from the rig subtracting from the recharge amps and thus taking longer/ more gen time to do the recharge.
That's the only time I use the 100amper. It is not the rig's converter (It could be if the 7355 ever dies--no sign of that!)
I don't have a converter, threw that junk away when I installed my Magnum.
The Magnum has a 125 amp charger built in. With one yammy I get about 85-90 amps at 13 amps input. Problem is, the Magnum's "brain" doesn't tolerate heavy loads cycling, even if the internal charger is shut off. It doesn't wait for the yammy to spool up when the dehum. compressor kicks in, instead it disconnects the generator and switches to battery.
The hybrid Magnum's brain works differently. Instead of disconnecting the generator, it kicks in extra juice from the batteries, until the generator can carry the load completely.
