RV Adventure Couple
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- Joined
- Apr 3, 2020
- Messages
- 51
Is your plan to leave panels connected to SCC?Also I have a 50A breaker going from the CC to the battery that I disconnect when we aren't traveling.
I have a on/off from the panels to the CC also.Is your plan to leave panels connected to SCC?
Does your inverter have a low voltage cutoff? It should do what you appear to be doing with a BMS.I am under the impression to power a 3000 watt inverter I would need at least a 250a BMS. Or build out 2 - 12v batteries and put 150a BMS on each. Since what I have ordered is 8 cells.
Inverter cuts off at 10.6 voltsDoes your inverter have a low voltage cutoff? It should do what you appear to be doing with a BMS.
Most folks only use a BMS on the charge side.
And unless configurable, a BMS would "likely/probably/YMMV" cut off at 2.5v. (10v).Inverter cuts off at 10.6 volts
If I were to use a BMS, I was under the impression a 3000 watt inverter needed a 250a BMS on the 8 cell pack or 2 - 12v packs with 150a bms in parallel?And unless configurable, a BMS would "likely/probably/YMMV" cut off at 2.5v. (10v).
I dunno. I only use a BMS on the charge side. Maybe some else knows about what you are trying to do... of which, I cannot understand why.If I were to use a BMS, I was under the impression a 3000 watt inverter needed a 250a BMS on the 8 cell pack or 2 - 12v packs with 150a bms in parallel?
Well I am still learning so I guess I have my setup all wrongI dunno. I only use a BMS on the charge side. Maybe some else knows about what you are trying to do... of which, I cannot understand why.
Okay I ordered a BMS - https://www.aliexpress.com/item/4000425316662.html?spm=a2g0s.9042311.0.0.6d204c4dI5cMccI dunno. I only use a BMS on the charge side. Maybe some else knows about what you are trying to do... of which, I cannot understand why.
I am under the impression to power a 3000 watt inverter I would need at least a 250a BMS. Or build out 2 - 12v batteries and put 150a BMS on each. Since what I have ordered is 8 cells.
Okay I ordered a BMS - https://www.aliexpress.com/item/4000425316662.html?spm=a2g0s.9042311.0.0.6d204c4dI5cMcc
Should I return the battery protect since I will have the bms?
Thanks, yea the video won't be so much as a how to but rather a what I did.Looking forward to your video on the cell build. I just watched your solar install you uploaded 3/29
You can still use a battery protect if you have other non-inverter loads that are not going thru the BMS.Should I return the battery protect since I will have the bms?
You can still use a battery protect if you have other non-inverter loads that are not going thru the BMS.
I am still a little mystified why you want a BMS to cut power to an inverter that will have already shut down .6v earlier.
I guess if a single cell got below 2.5v and the battery was above 10.6v (way out of balance), the BMS would shut down first.
Like i said earlier, like most folks, i only charge thru the BMS, not discharge.
I was trying to build the system without a BMS because I already had bought previously a 12v 3000 watt inverter. So I was trying to keep the system 12v. I can program my CC and I figured with a battery protect, I could get away with not having the BMS and just balance the cells a couple times a year. I understand the CC can drain the battery and damage the cells, but it has never even gotten close to draining my 100ah deep cycle lead acid battery and when we are not using the camper I turn the breaker that's between the CC and the battery off as well as the on/ off switch between the solar panels and the CC. From what I have seen in Will's videos if I wanted to put a BMS on my bank to power my 12v 3000 watt inverter, the BMS's would have to be rather large. I am barely learning so I have feed myself a ton of information so maybe I didn't retain something correctly.You can still use a battery protect if you have other non-inverter loads that are not going thru the BMS.
I am still a little mystified why you want a BMS to cut power to an inverter that will have already shut down .6v earlier.
I guess if a single cell got below 2.5v and the battery was above 10.6v (way out of balance), the BMS would shut down first.
Like i said earlier, like most folks, i only charge thru the BMS, not discharge.
Could I see a picture of your setup maybe that will help my ape brain understand. Also I am not understanding why the battery protect cant go between the battery and the inverter.You can still use a battery protect if you have other non-inverter loads that are not going thru the BMS.
I am still a little mystified why you want a BMS to cut power to an inverter that will have already shut down .6v earlier.
I guess if a single cell got below 2.5v and the battery was above 10.6v (way out of balance), the BMS would shut down first.
Like i said earlier, like most folks, i only charge thru the BMS, not discharge.