SOO GREAT TO SEE YA AGAIN . YOUR SYSTEM SEEMS TO BEEN DOING TOP NOTCH 100% AND WITH THE MINI SPLIT ADDITION , I KNOW YOU'RE REALLY PROUD OF ITS PERFORMANCE AND SHARING IT IN THE MAKING OF THIS VIDEO . MAY THE SOLAR BE WITH YOU .
One other complication in your theory to consider is take the last diagram and draw another one twice as big then connect a pipe (bus bar) in between them now try to get the larger one to charge to 100% lol. Nice video love your thoughts.
Funny enough, I keep running into that type of situation whenever my father in law asks about adding additional capacity. Being a 14s battery is unusual and everything we find is 16s. Building our own expansion with prismatic cells is pretty much the only option to expand this system. Thanks for watching!
Awesome ! Link to the buck converter ? Any comments on that item ? Efficiency/heat production/quiescent current/thermal and/or overload protection etc... ?
Do you have an update related to battery balancing or shunt recalibration? I have 32 of these batteries to build a backup system. Did you ever consider reconfiguring them to do an 8s2p system to get higher DC voltages instead of the max 50.4V at full charge these will output in series as 7s2p? The 48V inverters have cut-off voltages around 38.4 to 41VDC which would not be near (only about 2.75VDC per cell) the 2.5V full safe discharge for each cell. In other words, how did you solve the problem of the lower 7S voltage of these packs and keep your inverter happy when pulling large loads?
Balancing has been phenomenal. They stay very well balanced. The shunts are off slightly and I need to do a few full discharge and charge cycles. For the application right now, it works as is. Is your system going to be for a home?
@@diyrenewableenergyelectron4996 Yes I have an Enphase system but couldn't find an installer anywhere in my state that would add an Enphase battery system, nor a Powerwall installer, since Enphase claims to be Powerwall compatible, to attach a battery backup system to my existing system. Instead, I am doing an off-grid style battery backup and inverter system that I can use in case of prolonged blackout. Unfortunately, I won't benefit from being able to sell stored power back to grid, nor have a fast switchable system that immediately backs up my entire house, but that's not really what I care about anyway. I am basing my system off of Will Prowse's 48V Offgrid system and his EG4 6500EX-48 off-grid inverter recommendation. The big difference being the battery backup comprised 32 of these A123 7s batteries I got locally under $90 each (I consider that a great deal but I have heard others get these around $50 each which is insanely cheap given build quality.)
This is why I don’t build my own system, too complex for me. Even though I put my own together, I bought the batteries with BMS already in them. Using a Victron shunt. 🖖
Yeah, nowadays it can be extremely simple to put a system together. Server rack battery, all in one inverter/charge controller, done. Victron is good stuff! Thanks for watching!
Thanks for making this video
Super sexy mini split Montague! Good work.
SOO GREAT TO SEE YA AGAIN . YOUR SYSTEM SEEMS TO BEEN DOING TOP NOTCH 100% AND WITH THE MINI SPLIT ADDITION , I KNOW YOU'RE REALLY PROUD OF ITS PERFORMANCE AND SHARING IT IN THE MAKING OF THIS VIDEO . MAY THE SOLAR BE WITH YOU .
Haha thanks! It’s always nice to see a project run smoothly! 😂 thanks for watching and commenting!
Great info, thanks for sharing your knowledge!
Thanks for watching!
Wah, mantap betul sistemnya... salam mandiri energi!
One other complication in your theory to consider is take the last diagram and draw another one twice as big then connect a pipe (bus bar) in between them now try to get the larger one to charge to 100% lol. Nice video love your thoughts.
Funny enough, I keep running into that type of situation whenever my father in law asks about adding additional capacity. Being a 14s battery is unusual and everything we find is 16s. Building our own expansion with prismatic cells is pretty much the only option to expand this system. Thanks for watching!
Awesome ! Link to the buck converter ? Any comments on that item ? Efficiency/heat production/quiescent current/thermal and/or overload protection etc... ?
Valefod DC to DC High Efficiency... www.amazon.com/dp/B07KPLQG6D?ref=ppx_pop_mob_ap_share
I haven’t used it yet so I can’t say but I’ll likely do a video when we use it on the system. Thanks for watching!
@@diyrenewableenergyelectron4996 Can't wait to see what's next !
Do you have an update related to battery balancing or shunt recalibration? I have 32 of these batteries to build a backup system. Did you ever consider reconfiguring them to do an 8s2p system to get higher DC voltages instead of the max 50.4V at full charge these will output in series as 7s2p? The 48V inverters have cut-off voltages around 38.4 to 41VDC which would not be near (only about 2.75VDC per cell) the 2.5V full safe discharge for each cell. In other words, how did you solve the problem of the lower 7S voltage of these packs and keep your inverter happy when pulling large loads?
Balancing has been phenomenal. They stay very well balanced. The shunts are off slightly and I need to do a few full discharge and charge cycles. For the application right now, it works as is. Is your system going to be for a home?
@@diyrenewableenergyelectron4996 Yes I have an Enphase system but couldn't find an installer anywhere in my state that would add an Enphase battery system, nor a Powerwall installer, since Enphase claims to be Powerwall compatible, to attach a battery backup system to my existing system. Instead, I am doing an off-grid style battery backup and inverter system that I can use in case of prolonged blackout. Unfortunately, I won't benefit from being able to sell stored power back to grid, nor have a fast switchable system that immediately backs up my entire house, but that's not really what I care about anyway.
I am basing my system off of Will Prowse's 48V Offgrid system and his EG4 6500EX-48 off-grid inverter recommendation. The big difference being the battery backup comprised 32 of these A123 7s batteries I got locally under $90 each (I consider that a great deal but I have heard others get these around $50 each which is insanely cheap given build quality.)
This is why I don’t build my own system, too complex for me. Even though I put my own together, I bought the batteries with BMS already in them. Using a Victron shunt. 🖖
Yeah, nowadays it can be extremely simple to put a system together. Server rack battery, all in one inverter/charge controller, done. Victron is good stuff! Thanks for watching!