{"id":16402,"date":"2026-04-22T09:13:26","date_gmt":"2026-04-22T16:13:26","guid":{"rendered":"https:\/\/cowlesmountain.com\/Travels\/?p=16402"},"modified":"2026-04-22T09:25:44","modified_gmt":"2026-04-22T16:25:44","slug":"completed-my-tiffin-bus-conversion-to-20kwh-48v-rack-mount-batteries-and-7000kw-inverter","status":"publish","type":"post","link":"https:\/\/cowlesmountain.com\/Travels\/2026\/04\/22\/completed-my-tiffin-bus-conversion-to-20kwh-48v-rack-mount-batteries-and-7000kw-inverter\/","title":{"rendered":"Completed my Tiffin Bus conversion to 20Kwh 48v rack mount batteries and 7000Kw Inverter."},"content":{"rendered":"

\"\"<\/a>It took a couple months of work but now all 120v systems and plugs are powered by a 7Kw Midnite Rosie Inverter. And so far my testing has made me a Very Happy camper! As the biggest test of the Inverter and 20Kwh of rack mounted batteries I was able to run both rooftop Air Conditioners for 4 hours and only use 1\/2 their capacity (50% SOC).
\nGrid support also allowed me to run one (and probably both) connected to a 15 amp 120v Shore Power connection. (heading to Canada for this summer and often it can be Hot and they can be limited to 30 amp SP and sometimes 15 amp (not even 20) So we will be able to stay cool.
\nHaving everything enabled to be turned on no matter if hooked up or not and not having the run the Genny will make the DW Very happy also. I remember many times kicking myself for not changing the wiring on the Central Vac to work on the old 12v Magnum. And weirdly enough, it uses very little power.<\/p>\n

I took a pic of the setup but when I was about to upload it I realized I had put the Inverter Cover back on upside down so it looks too dumb to add. I do need to get back into the inverter so I can connect another cable to the CAN bus so it will not be long till its right side up again.<\/p>\n

The Big Rosie 7048M (mobile version) is very light weight and was silent when running both the AC’s for 4 hours the other afternoon. And the unit was cool to the touch, nothing like my old MS2818 that blew so much heat out just running 300 watts of things I often left the Inverter Bay door open to keep it below 140 degrees in there. Maybe that was due to inverting 12v to 120 is harder than 48v to 120v, not sure.
\nI cannot believe I was considering installing two Victron Quattro’s.. The Midnite cost the same as two 5kw Quattro’s, but is a simpler install and way smaller than a single Quattro.
\nAlso the Midnite Solar Rosie does 240v Split Phase natively. So, soon I can get that Wolf Induction cook-top the DW wants me to install. From what I can tell even the New Tiffin’s require you to have a 50 amp Shore Connection or the Genny running, and my 7500w genny doesn’t produce 240v, just 120v twice same phase. I would be able to run it on 15 amp SP or no SP at all now.
\nI think the hardest part of the whole build was swapping out the Breakers under the fridge so I could terminate those two 20 amp circuits that came from the PS rear inverter bay into the Main circuit panel. One new 20 Amp breaker replaced the 30 amp that had gone to the Inverter as its source of power and then swapping out another 15 Amp full size breaker for the W\/D for a Tandem breaker with a 15 and 20 amp on it.<\/p>\n

At the moment I only have 1600 watts of solar on the roof so next winter that may have to change. Will know more at the end of the summer.
\nHere is a pic of the batteries hanging from the Freighliner Chassis in my bus, and the floor jack I used to get them stacked up. That top one was a bit precarious install as they weigh ~100 each.<\/p>\n

\"\"<\/a> \"\"<\/a> \"\"<\/a> \"\"<\/a> \"\"<\/a> \"\"<\/a> \"\"<\/a> \"\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

It took a couple months of work but now all 120v systems and plugs are powered by a 7Kw Midnite Rosie Inverter. And so far my testing has made me a Very Happy camper! As the biggest test of the Inverter and 20Kwh of rack mounted batteries I was able to run both rooftop Air … <\/p>\n

Continue reading “Completed my Tiffin Bus conversion to 20Kwh 48v rack mount batteries and 7000Kw Inverter.”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-16402","post","type-post","status-publish","format-standard","hentry","category-traveling-the-hiways-and-byways"],"_links":{"self":[{"href":"https:\/\/cowlesmountain.com\/Travels\/wp-json\/wp\/v2\/posts\/16402","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cowlesmountain.com\/Travels\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cowlesmountain.com\/Travels\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cowlesmountain.com\/Travels\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cowlesmountain.com\/Travels\/wp-json\/wp\/v2\/comments?post=16402"}],"version-history":[{"count":3,"href":"https:\/\/cowlesmountain.com\/Travels\/wp-json\/wp\/v2\/posts\/16402\/revisions"}],"predecessor-version":[{"id":16415,"href":"https:\/\/cowlesmountain.com\/Travels\/wp-json\/wp\/v2\/posts\/16402\/revisions\/16415"}],"wp:attachment":[{"href":"https:\/\/cowlesmountain.com\/Travels\/wp-json\/wp\/v2\/media?parent=16402"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cowlesmountain.com\/Travels\/wp-json\/wp\/v2\/categories?post=16402"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cowlesmountain.com\/Travels\/wp-json\/wp\/v2\/tags?post=16402"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}