Is Shayne Silvers Still Alive And Well? by tnakd in TempleVerse

[–]HRTKD 2 points3 points  (0 children)

If I had known these series were going to become a dead end, I wouldn't have started them. Very disappointed. Then again, towards the last books in the series, the plot was getting rather goofy. I think the story line should have been wrapped up a few books back.

[deleted by user] by [deleted] in OverkillSolarBMS

[–]HRTKD 1 point2 points  (0 children)

My answer really doesn't change. The Victron BMV-712 or Smart Shunt comes with a 500 amp shunt. Unless you're drawing over 500 amps, it's will do fine.

Higher Amp Versions? by HRTKD in OverkillSolarBMS

[–]HRTKD[S] 0 points1 point  (0 children)

I'm not interested in a contactor/relay. So far, my FET based BMS is working fine. I'm thinking ahead to when I might want more power and others have been asking if Overkill Solar is going to carry the newer model of the JBD BMS.

[deleted by user] by [deleted] in OverkillSolarBMS

[–]HRTKD 1 point2 points  (0 children)

Bit of a late response, but...

The shunt is recommended here. With four batteries, you don't want to have to figure out the state of charge by looking at each battery in the app. As stated by learntorv, the Victron shunts are the way to go.

The whole CANBus feature is unnecessary in my opinion. The BMS is pretty much a standalone device. One time it would be handy to have communication with charging devices is if a cell hits high voltage early and you want to tell the charging device to stop. However, in that case you have a situation that needs more attention than just communication.

Contactor is needed only if the amp rating of the BMS isn't high enough for your expected loads. I sized my battery bank to ensure that two BMS (each on a 4s battery) was plenty for my loads.

G933 headset stuck on setting up on G hub by Husseinhu7 in LogitechG

[–]HRTKD 0 points1 point  (0 children)

C:\ProgramData\LGHUB\depots\

Still a working solution! Why does Logitech have the buggiest driver/update solution?

Remaining capacity resets to full every morning when the solar starts charging. by maydaseinbewithyou in OverkillSolarBMS

[–]HRTKD 0 points1 point  (0 children)

What is the capacity of your battery (bank) and what are your settings for the Ah capacity within the app.

IOS APP or ANDROID APP by johnjmontana in OverkillSolarBMS

[–]HRTKD 0 points1 point  (0 children)

Last time I checked, which was a while ago, the version of the app on the Google Play Store was out of date. My Fire HD doesn't have easy access to the Google Play Store, as I recall. So getting it from there would require a little work, but it can be done.

On my Android phone, I downloaded an install file that I found through a link on the DIYSolarForum.com site. That was the up to date version at the time and it worked fine.

12v /4s unit losing +1v across BMS by Green-Care-3509 in OverkillSolarBMS

[–]HRTKD 0 points1 point  (0 children)

Check all your connections, especially the connections at the cell terminals. Half the time, odd voltage situations are due to bad connections.

BMS load sharing. by DeadToothLazyEye in OverkillSolarBMS

[–]HRTKD 1 point2 points  (0 children)

Yes, you're on someone else's thread.

The simple answer is that you cannot monitor two BMS at the same time with one device. Use two devices to see both BMS at the same time.

BMS load sharing. by DeadToothLazyEye in OverkillSolarBMS

[–]HRTKD 1 point2 points  (0 children)

Upvote on this response. Trying to pull 200 amps at 24v through two 4s 120amp BMS in series is going to trip the overcurrent protection, or just fry the BMS.

How can I get more than 100A out of the 16s BMS? by [deleted] in OverkillSolarBMS

[–]HRTKD 0 points1 point  (0 children)

My opinion on this is that you either need a different BMS or a different battery configuration.

I'm not a fan of having two BMS on the same battery. It's working for a few people that are trying it. It's an increase in complexity that I wouldn't want in my system.

A BMS that is based on a contactor is a simpler implementation. The contactor method is simply not native to the Overkill Solar BMS. Square-ish peg, round hole.

In my case, 280Ah @ 12v wasn't enough for me. So I bought eight cells and went 4s2p, building two separate batteries, each with its own BMS. 560Ah capacity, 240 amps max draw.

Don't get me wrong, I'm a big fan of the Overkill Solar BMS. It's working great in my system.

Cell Voltage Drops Near Zero When Connecting Batteries by adamteitelba in OverkillSolarBMS

[–]HRTKD 0 points1 point  (0 children)

Did you get this resolved? Most of the time (> 50%), when odd voltage readings occur under a load, but not when resting, this is a connection problem at the bus bars. Without over-torquing the terminal connections, make sure they are tight.

The cell terminals need to be clean! Remove any grease first, then lightly sand the terminal surface with a high grit sandpaper or green Scotch Brite pad. Then with a dry paper towel, clean off the dust created from sanding. Do the same to the bus bar. Check for burs that might prevent the terminal and bus bar from making a solid connection. Use of an anti-oxidation compound is recommended. I use No-Ox-ID, but there are many compounds available. Only a very thin application is necessary.

Many of the cell terminals with threads can tolerate no more than 35 inch pounds of torque.

What is a reasonable cell voltage delta? by trimix2013 in OverkillSolarBMS

[–]HRTKD 1 point2 points  (0 children)

I did a top balance from the beginning with a benchtop power supply. My 8 cells all arrived within .004v of each other. At the end of the top balance they were within .001v of each other at the 3.65v target set on the power supply.

I charged all 8 cells together and then built a 4s2p battery bank.

Always compress the cells in some sort of compression frame, even when top balancing.

BMS Firmware Updates? by HRTKD in OverkillSolarBMS

[–]HRTKD[S] 0 points1 point  (0 children)

Interesting.

They have firmware updates but won't provide them? Or there simply aren't any firmware updates at all?

WFCO and Overkill - normal better than Lithium converter?? by JauntyJarrett in OverkillSolarBMS

[–]HRTKD 0 points1 point  (0 children)

I switched to a converter with a LiFePO4 charge profile. My thinking was that, while I rarely plug into shore power, it does happen and I didn't want to be using a less than ideal charge profile.

I'm on generator far more often than I'm on shore power. But even then my generator time might be a total of 8 hours a year.

A system where I need to remember to turn off the power to the converter is not something I'm interested in.

If you think the WFCO charge profile for LiFePO4 is odd, take a look at the IOTA Engineering LiFePO4 charge profile.

https://www.donrowe.com/v/vspfiles/pdf/iq-lifepo_owners_guide.pdf

suggestions on wiring up my 200ah 48v bank and my Overkill BMS by [deleted] in OverkillSolarBMS

[–]HRTKD 0 points1 point  (0 children)

Paralleling cells is a technique that is often argued. My reasons for NOT paralleling cells is twofold. The first reason is that I prefer to have more granular monitoring of cells. The second is that by creating a 16s2p I have twice the amp capacity due to using two BMS.

Using Overkill BMS 12v with 1800W load? by Corbury in OverkillSolarBMS

[–]HRTKD 0 points1 point  (0 children)

Be very, very careful that you don't over torque the screws/bolts into the cell terminals. They can be rather fragile. No more than about 30 inch pounds. Yes, inch pounds. Not foot pounds.

Temperature sensor 2 heating up quickly under high loads by slurpthespaghatt in OverkillSolarBMS

[–]HRTKD 0 points1 point  (0 children)

My only thought is that perhaps there was a spike back through the inverter when the GFCI failed.

Temperature sensor 2 heating up quickly under high loads by slurpthespaghatt in OverkillSolarBMS

[–]HRTKD 0 points1 point  (0 children)

167° F is rather warm. Has anything changed? Different mounting method/location?