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Thumbsup battleborn9/21/2023 ![]() ![]() Lastly after the first time I used it (duh) it occured to me that normally I turn off the Magnum charger and let the generator cool down as recommended, but I had neglected to provide any switch for the new charger. (After some more testing on a hotter day I could consider widening that outside hole and installing a fan to bring in fresh air, but I don’t think it will be needed.) In a pinch I can always crack the compartment open while charging. The other thing is that this generates a lot of heat! It was about 85 degrees, but I am concerned that in 100 degree weather it could get too hot (it tapers the charge in that case) or even discolor the paint on the compartment door. (Actually just a single 4 GA would suffice, but I always enjoy overkill.) I’ll run two positives and two negatives, which is more amps carrying capacity that a single 2 GA. Since the charger has dual terminals, I ordered some 4 GA wire. The charge only tapered slightly over time unlike the Magnum which always fell off a cliff. I ran it about an hour on generator and it otherwise performed really well. I’m not sure if the later is higher than expected. The charger quickly warmed up to 105 degrees and the cable entrance 127. The 2 GA wire barely fit, and its possible that trying to shove it into the (too small) hole I didn’t get a perfect seat. The other disappointment was that I really hate the screw on terminals, although nowhere near as bad as Victron supplies. While vastly better than the Magnum – my battery was only at about 70% SOC – I was expecting 80 amps. My initial guess is that to get the 80 amps the battery has to be more deeply discharged. The good news is that unlike the Magnum it didn’t yo-yo, but supplied steady current, albeit only 70 amps. ![]() When I fired up the generator, I was slightly disappointed. I took advantage of this project to move my Victron Battery Monitor into this compartment and also install a Victron Venus GX which you can see on the back wall.Īlso on the back wall is another 2″ hole and a fan shroud I mounted over it. In the final picture at the top of this post you can see how the installation looks. I ran 3 foot 2 GA wire to the Magnum posts to share the battery connection, again, because I will run only one at a time. This whole operation was not hard, but its a really tight space and cramped and it was a bit tedious for sure.Īfter that it was just a matter of hanging the thing on the wall. Then I ran that over to a new AC receptacle to share the 20 amp circuit. Then I was able to (just barely) open the magnum AC cover and pull out all the wires without dismounting it. Those holes come out surprising smooth and free of burrs but I covered the hole with a “bumper” anyway: The first step was to punch two holes in the compartment with an electrician’s greenlee punch set. The Progressive Dynamics PD9180ALV 80 Amp Lithium Charger requires a 20 amp commercial style outlet, so I decided to cut the 20 amp circuit feeding the magnum and install the outlet to share.Īs long as I run only one at a time that’s fine. The magnum has a setting to turn the charge down from 90% to 0%, so the great thing about this is, if my new charger ever fails I already have a backup. So I decided to add a seperate LifePo4 charger in the adjacent compartment. Then I started noticing you can get really cheap but good quality chargers and inverters if you buy them separately for some reason. ![]() (The only thing I ever run off it is the TV and the Roku.) I looked around at inverters/chargers, especially the Victron, but they are big, heavy, and expensive, and I don’t have any problem with my Magnum 1000 watt inverter. I called Magnum tech support and they said there was a voltage drop from the generator (there isn’t). I called Battleborn and they said that model “doesn’t work for Lithium”. It sorta works much of the time, but on generator instead of the constant 50+ amps that I expect it enters yo-yo mode, i.e., it zooms up to 55 amps or so, then after less than a minute stops, then starts to creep up again. ![]() Each thing I kick in the RV causes some new deficiency to be noticed, that either wasn’t there before or had escaped my attention.Īfter all my upgrades I noticed that the stock Magnum inverter/charger doesn’t work well on lithium. Note: This is an older post and I have subsequently upgraded to 300 AH of Renogy Lithium and a Xantrex 3000 XC Pro Inverter. ![]()
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