ElectroDacus DSSR20, Руководство пользователя

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SBMS0
SBMS0
www.ElectroDacus.com
www.ElectroDacus.com
8 Dual PV array functionality and SOC charge limiting
8 Dual PV array functionality and SOC charge limiting
SBMS0 has now to of the DMPPT450 functionalities see below the details.
In the first photo you can see the same two DMPPT450 settings max charge current and Max SOC also
apply now to SBMS0 directly.
The max SOC limit is in this example set at 70% and what will happen is that every new day the battery will
first be fully charged 100% SOC but then the next charge cycles for the same day will only start at 67% and
end at 70% so it will stay around 70% SOC and cycle there with a 3% SOC hysteresis. You can set this at
any limit 80 to 90% will be great setting for LiFePO4 while for NMC and LiCoO2 around 70% to 80% will be
best.
The max charge current can be set between 10A minimum and 600A max for SBMS0 as one typical 60 cell
panel outputs up to 10A and you can not have less than one panel and SBMS0 can support 60 of those
panels with the use of 30x DSSR20's
The way this limit works is that you will have the PV array split in two with a small PV array set as type 1 and
second array ideally 2x the size of the first as type 6.
In second photo you see EXT IO4 set as type 1 and EXT IO5 as type 6.
As an example a 24V 200Ah LiFePO4 battery should be charged at max 50 to 60A so you can just use 6
large panels and that is all but since panels are less expensive than batteries it is useful to have a larger PV
array and so you can add a second separately controlled array of 12 panels that is controlled by EXT IO5
set as type 6 and this way when the small 6 panel array only outputs half the 50A limit say 24.99A the
SBMS0 will disconnect this and switch the 12 panel array that if in same conditions should now output
around 50A so even if amount of solar dropped to half you can still charge at full 50A this will be called level
2 noted with L2 on the LCD and if this drops below 66% of 50A = 33A then it will add the 6 panels at the
same time so now you have all 18 panels connected and should still get 50A this will be called level 3 you
can see in last image the L3 indication on the lower left part of the screen just after PV1.
If now the solar increase to more than 20% above the 50A limit (60A) then it will drop to Level 2 and if that
also exceeds by 20% the max setting it will drop to Level 1 that since only has 6 panels can not exceed the
ideal charge current for this battery.