UndermountAC.com 2024 Heat Control offerings for 12V 24V and 48V systems

Integration controllers for adding hydronic heating options gasoline, diesel, propane like Espar and Webasto units
Available here:
undermountac.com/collections/...

[@azirish10]

I'm interested in the 48V system with heat capability. But there are a couple things I still have questions about. I'm planning on an above-average 48V lithium system on an overland vehicle. I haven't settled on a platform vehicle yet. But it will be a little more rugged than a cargo van. I'm hoping to incorporate the heating system as much as possible with the AC infrastructure to avoid unnecessary redundancy with ducting and additional equipment taking up more space. I also want to incorporate hydronic heat from the engine as an efficient way to utilize a free heating source to heat the "house" water and offset some of the energy to heat the living space. It does appear your system will be able to utilize the engine heat with heat exchangers. But how will it work with a hot water storage tank to use in the living space? I want to use all energy sources as efficiently as possible. Given that I will use hot water every day while only needing cabin heat for part of the year, I would prefer to be able to use as much hot water from the engine heat as possible before having to heat it with a secondary source like diesel or electricity. I'm not sure if your system allows for that. In one of your videos, you mention a new coolant reservoir you now offer. But the way you described it, I wasn't sure if it held coolant or water. I'm still a little confused about how the whole system (with stored hot water) would work together. I also noticed the new reservoir tank will have the ability to use electricity to heat the liquid as another alternative heat source. I believe it's supposed to be 120V. How much power will it use and will there be an option to use a DC source as an alternate, especially 24V or 48V? I look forward to more info. Thanks

[@undermountac]

The 120V element is 1800W, it can only be a 120V element as there are no 24V or 48V source elements available for this sort of application. The Heat thermostat now has the option of "Aux Heat" meaning when turned on it will activate relay #4 which can be connected to the 120V element or any secondary pump/system that provided auxiliary heat (such as the engine). It's also worth nothing modern day Espar hydronic heaters have temp sensors in them and if they see that the coolant running through them is hot enough (like from an engine exchange) they will not cycle/fire until the temperature dips below the threshold. Coolant reservoir tanks are for coolant, and are necessary to keep an adequate amount of coolant running through the system (hot storage) and to prevent air in the system. Hope this answers your questions, feel free to reach out or ask any others here.

[@jonmustang]

Very interested in your setup! What is the benefit of having a 120v heating element? Like, what is that commonly used for in RVs or vans?

[@undermountac]

It gives you an additional source of heat to maintain hot water temperature while you are plugged into shore power.

[@TheQuartzScepterMinerSIO2]

Will it work for a 1970 VW Bug (Beetle)???

[@dylandesmond]

Yes, it's a basic ac setup... nothing fancy. It will 100% work