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I think there are a lot of us tracking on the feasibility of solar and/or wind based off-grid climate control. That video of the mini-split system running 24/7 off grid got my attention too. It seems to me that with current commonly available devices, this CAN be done, but is not yet as...

I should probably start my own thread so as not to distract from the design/diagram that the OP is fine tuning. The two controllers I've come across so far that combine MPPT solar with a DC-DC charger in one unit are the Renogy DCC50S and the KISAE DMT1250. Given that my current converter is...

I have a small Danby residential (115V) fridge that I installed in my RV when the absortion unit died a few years ago. I think it's a 7.3 cubic foot, so it is close to the size of the DC fridge you mention. I just did a 7 hour test of this fridge running off an older Xantrex XPower 1500 watt...

I have a pair of these and I don't have a problem with the terminals, but I do use a small handheld mini-beam torque wrench to ensure that I don't over-torque them. If I were going to be making frequent connections and disconnections, I might opt to install long metric set screws to convert the...

I think Will's solar shed is one of the reference points that piques people's interest. I have watched his videos on the Air Conditioner portion, but have not researched all of the details. The climate is definitely extreme enough! For it to be a good parallel to a vehicle mounted system, the...

Unless the wiring run to your battery is extremely short, or you're only going to run a few hundred watts on the inverter at a time, I think you're going to run into trouble with the 6 awg wire. The wire is not only being asked to support the load from the inverter, but the load of all of the...

The vast majority of travel trailers sold are not configured with boondocking in mind. When you talk about the trailer being an hour north, you go there on the weekends, and you have another building which has no power, it sounds like you are boondocking :) The 12V system in most trailers is...

As another data point, my 8 cells have been settling for about 36 hours after charging to 3.65. I left them paralleled for about 12 hours, then took off the bus bars. About 12 hours after removing the buss bars I wired up the Overkill Solar BMS, and now about 12 hours later they are sitting at...

I noticed that spec as significant. The Kisae should allow for 2S2P 100w 12v panels instead of the 4P required by the Renogy One thing I like about the Renogy is that it appears to be able to charge from the Alternator and from the Solar simultaneously, where the Kisae appears to charge from...

Is static impedance what you need to measure to match cells, or is it a more complex concept in the context of a battery? My hobby charger reports internal resistance, but not until it has been charging for a while, and in a series pack, the values move around a bit as the pack cycles...

On HotShots complete systems page they list the DC air conditioner as a $1995 item in the parts list

For those of us that have played with electric RC hobbies, I think it helps to think of the big LiFePO4 cells as oversized hobby batteries rather that using lead acid batteries as a baseline reference point for charging, storage etc. I am working on top balancing 16 of these cells at the...

The Renogy MPPT controller that you have is rated for a max input of 520W for a 12V system and a max input voltage of 100V. Each Renogy 100w panel has an open circuit voltage of around 21.5v, so no more than 4 in series to keep the voltage under 100v. Six panels would be considered to be...

Yes, I guess without some sense of the angle I took the picture from, it is not clear that these are sitting on a table :) . I was just trying to get a picture that included most of the stuff that I'm working with, but not much else. So far according to my AiLi meter, I've pulled about 40 ah...

I think there are 2 different use cases for how you might wire it depending on whether your idea of a generator for your RV is a box on the ground that you plug your RV into, or if your RV has a generator built in that has the potential to be actively producing power at the same time that you...

The challenge of AC on solar becomes considerably less daunting if you forget about the low-effciency roof mounted unit that came on your RV and look into a small 20+ SEER mini split system. There are a number of examples of people running these systems successfully while boondocking.

Based on the info you've given, I think you are getting way ahead of yourself. You can tell that your current setup is coming up short, but you have no way of knowing what part of the equation is out of line. When you say "per the meter", exactly what type of meter are you using? If it's just...

I know this is an old thread, but the way this is being approached is to backfeed the house through the DC pins the CCS connector, which gives the home inverter bi-directional access to the car’s battery in the same manner that L3 charging stations have direct DC access to the battery for...

I decided to upgrade my RV so I could extend the time I spend off grid with having to run the generator. I started with a basic RV electrical system with a PD9160 converter with Charge Wizard, Two 12 year old, used up T-105+ FLA batteries in series and alternator charging of the house batteries...

I picked up the 200W system that HQST has on sale that includes a 20A MPPT controller. It seems to be a nice kit, that comes with everything needed except the wires to connect the SCC to the battery. It supports 3 different LA battery types, has a basic profile for Lithium and has a User mode...

Actually what you propose seems really close to nominal for a replacement for a 48v flooded LA. 4 fully charged FLA batteries in series would sit at about 51.2v. Divide that by 15 and you get very close to 3.4v per cell, which is pretty close to fully charged for a LiFePO4 cell. You might have...

The situation you describe is true in an RV where you are choosing to power the circuits by connecting the shore power cord to the inverter, which is powered by the same batteries that the shore power charger is trying to charge. In my RV, The converter is on a circuit breaker, which I turn off...

Prior to mounting the 2 panels I have, I decided to map out the roof of my RV to a Max panel configuration, to ensure that My initial panel placement does not impact my expansion plans This is what my roof would look like with 14 panels on it: The front vent and the living room skylight...

You don't mention how large of a PV array you are planning for, but some of the most challenging things to plan/account for in mobile installations tend to be; absorption fridges running on electricity, any water heating and cooking appliances, and electric space heaters. Any of these generally...

It looks pretty complete for a solar system, it might be missing a couple fuses or breakers. Of course the specifics of your installation and needs might drive out the need for a few more or different items. The only thing I see missing is a way to charge a 24V battery bank from shore power or...

Thanks for the thoughts, it prompted me to better understand the reason behind the blueprints, rather than just copy them :) . I saw that Breaker in most of the blueprints, so I just replicated it. After skimming Will’s book again, it appears that it is to prevent a fire if there were to be a...

I’m not an expert, but Info from Lion Energy indicates that batteries in Series need to be matched, but batteries in parallel can be different, so the installation you describe should be OK

That looks a lot like what I'm planning as an upgrade to my class-C, so I'm very interested in additional feedback. A couple questions I have are 1) the advantage of the DC to DC vs using a simple isolator? 2) Does the shunt on the + vs shunt on the - make a difference? I'm sure that these...

I’m not sure how you’d go about fitting that u-shaped unit into a vehicle. The inside and outside parts cannot be separated. It’s designed to be placed in a large open window and then have the window closed into the channel in the center. I think the smallest capacity LG inverter unit would...

That makes sense, Thanks I just ordered a set of 2 UT 1300s on the Costco deal, so my design just went from AGM to LiFePO4. I'll probably lean towards one of the MPPT solar charge controllers with the DC-DC built in. The shunt I ordered appears to be designed for the negative side. I was just...

My motorhome already has a 12V AGM battery system that charges from shore power or the alternator. I have added a shunt based battery monitor so that I can keep track of the state of charge with reasonable accuracy. All it needs to be self sufficient is to do the 12v loads analysis and add the...

I dont know of a way to do it without a battery, but with a battery, you could build a cart that housed the battery, the solar charge controller, an inverter, and a low power (probably L1) EVSE) I'd suggest that you could park the cart connected tothe solar panel during the day to charge the...

Based on the pictures, it looks like they did get quite overcharged, but It's somewhat difficult to believe that 4 - 280ah cells in parallel (1120 ah) would have gone from 3.3V to 4.4V in one hour with a 10a charge current. Did you receive your cells fully charged?