GlennWest Posted May 25, 2020 Report Share Posted May 25, 2020 As many know I have 3 battery pak of Nissan leaf batteries. The individual paks are held together with all thread rod with end plates, battery cells sandwiched in there. I fabed some angle iron to make it solid and mount in my Teton. So I have total of 12 rods sticking up from batteries. There is at least 2 feet of air space above them. I can use rod extensions and install my Magnum 44448 pae inverter. Magnum manual states base of unit can get 190 degrees. Planly states no wood surface. How much gap should I leave under the inverter? Although a little heat might actually help in winter. Sounds crazy but lithium gives off very little heat.So why not Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
Darryl&Rita Posted May 25, 2020 Report Share Posted May 25, 2020 Off the top of my head, sounds like prime real estate for the purpose. Quote I have been wrong before, I'll probably be wrong again. 2000 Kenworth T 2000 w/N-14 and 10 speed Gen1 Autoshift, deck built by Star Fabrication 2006 smart fourtwo cdi cabriolet 2007 32.5' Fleetwood QuantumPlease e-mail us here. Link to comment Share on other sites More sharing options...
GlennWest Posted May 26, 2020 Author Report Share Posted May 26, 2020 (edited) That what I was thinking to. Opens a lot of doors using lithium. How much distance do ya'll recommend between batteris and inverter? I am thinking 2" ought to work Edited May 26, 2020 by GlennWest Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
Alie&Jim's Carrilite Posted May 26, 2020 Report Share Posted May 26, 2020 I'd do a 4-6" just for air flow between the pieces. If the inverter back can reach 190*, then over time that can cook any plastic parts nearby. Quote Alie & Jim + 8 paws 2017 DRV Memphis BART- 1998 Volvo 610 Lil'ole 6cyl Cummins Link to comment Share on other sites More sharing options...
Chad Heiser Posted May 26, 2020 Report Share Posted May 26, 2020 3 hours ago, Alie&Jim's Carrilite said: I'd do a 4-6" just for air flow between the pieces. If the inverter back can reach 190*, then over time that can cook any plastic parts nearby. I'd agree with this and if it were me, I shoot for about 6' of separation (if you have the room). Quote 2000 Kenworth T2000 w/ Cummins N14 and autoshift 2017 DRV Mobile Suite 40KSSB4 with factory mods, dealer mods and personal mods - now in the RV graveyard 2022 DRV Full House MX450 with customized floor plan 2018 Polaris RZR Turbo S (fits in the garage) 2016 Smart Car (fits in the garage or gets flat towed behind the DRV when the RZR is in the garage)My First Solar Install ThreadMy Second Solar Install Thread & Photos and Documents Related to the buildMy MX450's solar, battery and inverter system - my biggest system yet! chadheiser.com West Coast HDT Rally Website Link to comment Share on other sites More sharing options...
GlennWest Posted May 26, 2020 Author Report Share Posted May 26, 2020 yes, I was rather surprized reading that. That is getting hot. I have the room. Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
oldjohnt Posted May 26, 2020 Report Share Posted May 26, 2020 Glenn, thermodynamics and heat transfer etc was one of my worst subjects so take this with a grain of salt. That being said if you were to consider an Inverter may be operating at say 3000 watts that's a lot of BTU in heat energy that needs dissipated and transferred. Regardless of the manufacturers minimum space and separation requirements I would go for the most possible separation your space allows even if more then "necessary". John T NOT a heat transfer expert by any means lol so no warranty, talk to Victron or consult their manual for recommendations versus a guess Quote Link to comment Share on other sites More sharing options...
Lou Schneider Posted May 27, 2020 Report Share Posted May 27, 2020 (edited) 13 hours ago, oldjohnt said: Glenn, thermodynamics and heat transfer etc was one of my worst subjects so take this with a grain of salt. That being said if you were to consider an Inverter may be operating at say 3000 watts that's a lot of BTU in heat energy that needs dissipated and transferred. A lot less heat than you think, John. You have to account for the efficiency of the inverter. If a 3000 watt the inverter is 90% efficient at high power (most are) the maximum waste heat will be 1/10th of the input power, or 300 watts. The rest of the potential energy goes out to the loads. I used to tune broadcast transmitters that way, for maximum output and minimum exhaust heat. When solid state transmitters came out with Class D switching power devices (the same method used in modern inverters) it became possible to see a 50,000 watt transmitter sending less than 5000 watts (17k BTU/hr) of waste heat out the exhaust. In most cases the transmitter just dumped the heat into the room where an exhaust vent or an air conditioner carried it away. A far cry from the 30-40% overall efficiency of tube transmitters. Edited May 27, 2020 by Lou Schneider Quote Link to comment Share on other sites More sharing options...
GlennWest Posted May 27, 2020 Author Report Share Posted May 27, 2020 yes, and that inverter is rated at 4400 watts. Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
oldjohnt Posted May 27, 2020 Report Share Posted May 27, 2020 I agree, often an Inverter will be operating at FAR LESS then its absolute max rating IE less heat. Id still recommend as much separation as possible to be on the safe side. John T Quote Link to comment Share on other sites More sharing options...
GlennWest Posted May 27, 2020 Author Report Share Posted May 27, 2020 I have seen pics of these inverters bolted down to floor and a wall. ??? Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
GlennWest Posted May 27, 2020 Author Report Share Posted May 27, 2020 I believe I will get a sheet of Lexan and put across top of batteries. It is very heat resistant. Bolt unit to it. Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
jcussen Posted May 27, 2020 Report Share Posted May 27, 2020 (edited) Just checked my 4448 with about a 240 volt 2500 watt load. Sides and front ambient temp. Top [big side with grill] running about 115 f. I have mine mounted on wall so all heat goes up through the grill. Ambient air temp about 88 f. Edited May 27, 2020 by jcussen Quote Foretravel 40ft tag 500hp Cummins ISM 1455 watts on the roof, 600 a/h's lithium in the basement. Link to comment Share on other sites More sharing options...
GlennWest Posted May 27, 2020 Author Report Share Posted May 27, 2020 11 minutes ago, jcussen said: Just checked my 4448 with about a 240 volt 2500 watt load. Sides and front ambient temp. Top [big side with grill] running about 115 f. I have mine mounted on wall so all heat goes up through the grill. Ambient air temp about 88 f. metal wall? Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
jcussen Posted May 27, 2020 Report Share Posted May 27, 2020 (edited) 14 minutes ago, GlennWest said: metal wall? Plywood. Unit is spaced about 1/2 inch off because of feet. No indication of any heat being transferred to the wood. Used IR gun on back of plywood and it is at ambient temp. Appears most of the heat produced comes out of the top grill. But I am inverting, know from other inverter/chargers, more heat is produced when unit is putting out a big charge. I don't use my unit for charging. Edited May 27, 2020 by jcussen Quote Foretravel 40ft tag 500hp Cummins ISM 1455 watts on the roof, 600 a/h's lithium in the basement. Link to comment Share on other sites More sharing options...
GlennWest Posted May 27, 2020 Author Report Share Posted May 27, 2020 (edited) It only pulls max of 60 amps when inverting from battery. also charges at 60 amps Edited May 27, 2020 by GlennWest Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
jcussen Posted May 27, 2020 Report Share Posted May 27, 2020 Yes I am only pulling 48 amps out of batteries, so at full output, might get a little warmer. Quote Foretravel 40ft tag 500hp Cummins ISM 1455 watts on the roof, 600 a/h's lithium in the basement. Link to comment Share on other sites More sharing options...
GlennWest Posted May 27, 2020 Author Report Share Posted May 27, 2020 With those figures I see no need to do but lexan and bolt to it. Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
GlennWest Posted May 28, 2020 Author Report Share Posted May 28, 2020 After thinking about this, I believe not worry about height. Install a plywood section and put cement board on top. That way it be fire proof and have good support. Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
lockmup68 Posted May 29, 2020 Report Share Posted May 29, 2020 22 hours ago, GlennWest said: After thinking about this, I believe not worry about height. Install a plywood section and put cement board on top. That way it be fire proof and have good support. I was thinking just a piece of plywood since the fans inside the inverter force the air out the grill. Quote 2003 International Eagle 9200i, Cummins ISX, Freedomline 2007 Teton Scottsdale XT4 Link to comment Share on other sites More sharing options...
GlennWest Posted May 29, 2020 Author Report Share Posted May 29, 2020 1 minute ago, lockmup68 said: I was thinking just a piece of plywood since the fans inside the inverter force the air out the grill. Magnum plalinly states bolt to nothing flamable and mentions plywood. Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
lockmup68 Posted May 29, 2020 Report Share Posted May 29, 2020 14 minutes ago, GlennWest said: Magnum plalinly states bolt to nothing flamable and mentions plywood. Looking at all the install pics on the internet, guess a carpet covered basement wall in an RV meets that requirement? Quote 2003 International Eagle 9200i, Cummins ISX, Freedomline 2007 Teton Scottsdale XT4 Link to comment Share on other sites More sharing options...
GlennWest Posted May 29, 2020 Author Report Share Posted May 29, 2020 Yes, I have seen many on plywood wall. Seen them on carpet also. But to be fair, I don't see any 4400 watt units mounted period. I will have a pair of them and can see them near max some. Full summer, DW cooking, dryer running. But accourding to Jcussen his don't get nowhere temps Magnum stating. Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
Lou Schneider Posted May 29, 2020 Report Share Posted May 29, 2020 15 minutes ago, GlennWest said: Yes, I have seen many on plywood wall. Seen them on carpet also. But to be fair, I don't see any 4400 watt units mounted period. I will have a pair of them and can see them near max some. Full summer, DW cooking, dryer running. But accourding to Jcussen his don't get nowhere temps Magnum stating. At those power levels I'd be more concerned about the high current connections getting hot than the inverter itself. Quote Link to comment Share on other sites More sharing options...
GlennWest Posted May 29, 2020 Author Report Share Posted May 29, 2020 I have a hydraulic crimper. Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
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