michael d
off-grid solar pilgrim
You are mistaken again. The sbms0 turns off the dssr20 to prevent overcharging. You have no direct knowledge of this product. When the battery is fully charged the sbms0 turns off the charging from the dssr20.The fact he uses wrong numbers to support his argument that MPPT are useless and dismissed the question 3 times when I asked him about it.
The fact that wires losses and costs are not taken into account. And to make this problem even worse you can't go past 24 V.
The fact that it has no way to interrupt current itself and relies on other devices to act correctly.
there is very little wire loss with the standard 10awg wire. it is minimal at best. I use 50-60 feet runs and have no problems what so-ever charging the 2p8S lishen 544amp battery. the 30 foot runs have even less voltage drop when calculated and also is not an issue.
the SBMS0 can also control MPPT's if you go that route.
the SBMS0 is the BMS and it turns off the solar charge controllers so i would say it definitely stops the flow of current by using the control circuits using small sense /control wires (24 AWG cat 5 or cat 6 wires). there is no large current going through the SBMS0. it does not have the problems of getting rid of excess heat that some of the other BMS's do. there is nothing heating up and causing any problems in the SBMS0.
I have 2 SBMS0's functioning on 2 separate 24-volt redundant systems. they work like a finely tuned clock. and are very accurate to 3 decimal places and balance the LiFePO4 cells in the batteries very well. each one controls the DSSR20's. I do not have them controlling the inverter but that can be done also.
I fail to see where you say they do not control the current. they definitely control the current from the DSSR20's and can also work with the MPPT type solar charge controllers if that is what you choose.
when the individual cell voltage reaches 3.55 volts for too long of a pre-set time the SBMS0 turns off the DSSR20's (the solar charge controllers)
the inverter uses the load from the batteries or directly from the charge coming into the batteries from the solar panels through the DSSR20's.
when the sun is shining you can use as much of the incoming solar as you can through the inverter.
i have a 6000 watt inverter hooked up but have only used 1500- 2000 watts through it at this time.
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