Recent content by cwstnsko

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...

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...

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 tried my inexpensive, relatively low-tech refrigerator on my older 1500W Xantrex X-Power inverter and it ran, but the compressor was noticeably hotter to the touch than when running on the grid, so I only did it for a few days as a test. I'm not sure a 3-500W MSW inverter would even start the...

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...

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...

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?

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...

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...

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...

After the 1st time I tried to get the screws included with my cells to work with a double bus-bar, I knew that I would end up stripping some, no matter how careful I was, so I shut my project down for a couple days and ordered the 25mm long set screws recommended in other threads. If I had...

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...

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...

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 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...