hey, I have solar panels on my home. And i want to store the energy that i can't directly use. As explained in this video the battery dictates the charge/discharge rate. But is it possible to charge and discharge based on supply and demand with something like the victron VM-3P75CT energy meter? If it is possible, how bad/sub optimal would that solution be? The goal is to not use the grid while still being on the grid.
Hi, Russ from Australia here. I just came across your channel and love it! I have both Victron PCE and Pylontech batteries, so your subject matter is very relevant to me. I'm about to add 4 x US5000 to my existing bank of 10 x US3000C. My understanding is that when connecting the CAN Bus cables, one of the US5000 batteries should be the Master and that the other three should be next in the daisy-chain, before the US3000C batteries. Can you confirm this? Do US5000 and US3000C batteries use the same comms cable between the Master and the Cerbo? I have a vague recollection that a type "B" cable is used for some Pylontech battery types. Also, I understand that the batteries ship at about 50% SOC, so I am going to charge each of the new batteries to 100%, wait until the existing battery bank is also at 100% charge (I'm off-grid, so I'll have to wait for the Sun to do its job), and then install the new batteries when everything is at 100%. Can you confirm that this is correct? Last questions. I saw on one of your earlier vids, that these batteries are hot swap-able. That being the case, can I add the new batteries without powering down my system? I'm not sure whether changing to a new master battery while the system is "hot" can be done? I've never tried it but, do these batteries still power the system if the communications cables are disconnected from each other or the Cerbo GX? I'm trying to avoid downtime on my system but I'm not sure that I can avoid it. I see that the Pylontech instructions for the installation of additional batteries states that once the batteries are all connected together, they should be left "idle" while they do their final balancing, which may take a while. Obviously "idle" means not running my inverters... Cheers Rusty
Correct on the position of the new US5000s in your existing bank. They will use the same BMS cable as the US3000Cs. For SOC balancing, we have had no issues hooking them up with some pretty significant differences in SOC and then running them as is. Everything does a really good job of coming back into SOC parity through either charge or discharge cycles. For setting the new master, you will need to briefly power everything down and back on again so that the new master can address itself and the subsequent batteries. They will continue to provide power if the coms are disconnected from the Cerbo. Best to program the following settings into the Inverter so that everything continues working properly without DVCC from the coms. Absorption Voltage 52, Float Voltage 51, DC input low-shutdown 44, DC input low restart 48, DC input pre-alarm 48. Toss the same absorption and float into the MPPT and you should be good to go.
Hi there, I would recommend reaching out to one of the Victron distributors in Portugal www.victronenergy.com/where-to-buy to get a conversation going. They should be able to help you get started and have options for batteries they can support.
As far as I am aware, leave all switches in their default position, the batteries work out everything automatically. The master battery is the one with the empty LinkPort 0
hey,
I have solar panels on my home.
And i want to store the energy that i can't directly use.
As explained in this video the battery dictates the charge/discharge rate.
But is it possible to charge and discharge based on supply and demand with something like the victron VM-3P75CT energy meter?
If it is possible, how bad/sub optimal would that solution be?
The goal is to not use the grid while still being on the grid.
Hi, Russ from Australia here. I just came across your channel and love it! I have both Victron PCE and Pylontech batteries, so your subject matter is very relevant to me.
I'm about to add 4 x US5000 to my existing bank of 10 x US3000C. My understanding is that when connecting the CAN Bus cables, one of the US5000 batteries should be the Master and that the other three should be next in the daisy-chain, before the US3000C batteries. Can you confirm this? Do US5000 and US3000C batteries use the same comms cable between the Master and the Cerbo? I have a vague recollection that a type "B" cable is used for some Pylontech battery types.
Also, I understand that the batteries ship at about 50% SOC, so I am going to charge each of the new batteries to 100%, wait until the existing battery bank is also at 100% charge (I'm off-grid, so I'll have to wait for the Sun to do its job), and then install the new batteries when everything is at 100%. Can you confirm that this is correct?
Last questions. I saw on one of your earlier vids, that these batteries are hot swap-able. That being the case, can I add the new batteries without powering down my system? I'm not sure whether changing to a new master battery while the system is "hot" can be done? I've never tried it but, do these batteries still power the system if the communications cables are disconnected from each other or the Cerbo GX? I'm trying to avoid downtime on my system but I'm not sure that I can avoid it. I see that the Pylontech instructions for the installation of additional batteries states that once the batteries are all connected together, they should be left "idle" while they do their final balancing, which may take a while. Obviously "idle" means not running my inverters...
Cheers
Rusty
Correct on the position of the new US5000s in your existing bank. They will use the same BMS cable as the US3000Cs.
For SOC balancing, we have had no issues hooking them up with some pretty significant differences in SOC and then running them as is. Everything does a really good job of coming back into SOC parity through either charge or discharge cycles.
For setting the new master, you will need to briefly power everything down and back on again so that the new master can address itself and the subsequent batteries.
They will continue to provide power if the coms are disconnected from the Cerbo. Best to program the following settings into the Inverter so that everything continues working properly without DVCC from the coms. Absorption Voltage 52, Float Voltage 51, DC input low-shutdown 44, DC input low restart 48, DC input pre-alarm 48. Toss the same absorption and float into the MPPT and you should be good to go.
@@intelligentcontrols Thanks for the reply. I appreciate you taking the time to do it.
Hello, where in Portugal or in the zone of Lisbon that sell those type of products.
Hi there, I would recommend reaching out to one of the Victron distributors in Portugal www.victronenergy.com/where-to-buy to get a conversation going. They should be able to help you get started and have options for batteries they can support.
hello, pin number 1 from the master battery, is it down?
As far as I am aware, leave all switches in their default position, the batteries work out everything automatically. The master battery is the one with the empty LinkPort 0
Hi there, for an installation using the A/CAN port all the DIP switches should be at the zero position pointed up towards the numbers.
Yeah nah not pylontech
Hey, what has your experience with this battery been like? Or, what’s a lithium you recommend?