ElectroDacus DSSR20 Manuel utilisateur

user manual

v0.95

www.ElectroDacus.com

www.ElectroDacus.comSBMS0

SBMS0

DSSR20

2www.ElectroDacus.com
www.ElectroDacus.comSBMS40 / SBMS120
SBMS40 / SBMS120 
 
Table of contents
Table of contents
Simplified diagram   3
Specifications 4
1. Install instructions 5
2. Thermal management   10
3. Cable selection   11
4. Mechanical installation   12
5.  attery temperature   13
6. The 16pin connector  14
7. WiFi/US  optional extension  15
8. Dual PV array functionality and SOC charge limiting
9. WiFi 
16
17
10. Internal data logging 19
Schematic
22
Links to HW and SW files
43
11. User interface
46

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ADC1n / ADC1p

EXTIO3- / EXTIO3+

EXTIO4- / EXTIO4+

PVp / PVn

Pvn PVpADC1p ADC1n

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Specication

Battery type

Battery type any type of Lithium cells and Supercapacitors

any type of Lithium cells and Supercapacitors

Number of cells

Number of cells 3 to 8 cells

3 to 8 cells

Battery volta e limits (min/max)

Battery volta e limits (min/max) 8V to 32V

8V to 32V

Battery/PV recommandation 12V

Battery/PV recommandation 12V 4 cell LiFePO4 / 32 or 36 cells PV panel

4 cell LiFePO4 / 32 or 36 cells PV panel

Battery/PV recommandation 24V

Battery/PV recommandation 24V 8 cell LiFePO4 / 60 cells PV panels

8 cell LiFePO4 / 60 cells PV panels

Max PV Open Circuit volta e for DSSR20

Max PV Open Circuit volta e for DSSR20 49V (mono or polycrystalline panels with up to 72 cells)

49V (mono or polycrystalline panels with up to 72 cells)

PV input

PV input Usin as many DSSR20 as you want up to 30 or Victron MPPT with remote

Usin as many DSSR20 as you want up to 30 or Victron MPPT with remote

DSSR20 PV current

20A so up to two lar e 60 or 72 cell panels

External PV current shunt

External PV current shunt 10A up to 750A

10A up to 750A

External Batt current shunt

External Batt current shunt 10A up to 750A this is required for SOC calculation so it needs to be installed

10A up to 750A this is required for SOC calculation so it needs to be installed

EXT IOx optoisolators

EXT IOx optoisolators TLP187 max 300V 150mA

TLP187 max 300V 150mA

Cell balancin current

Cell balancin current max 200mA

max 200mA

Power terminal max wire size DSSR20

Power terminal max wire size DSSR20 AWG #10 (6mm2) should be reat for two panels, connectors max AWG #6 (16mm2)

AWG #10 (6mm2) should be reat for two panels, connectors max AWG #6 (16mm2)

Battery temperature sensor

Battery temperature sensor Thermistor (optional) 10KOhm B3900

Thermistor (optional) 10KOhm B3900

16pin connector / ( 8pin + 2pin ) side connector

16pin connector / ( 8pin + 2pin ) side connector Includes I2C, UART, Ext IO, 16bit ADC / ext current shunt for Battery and PV

Includes I2C, UART, Ext IO, 16bit ADC / ext current shunt for Battery and PV

Data lo in to internal Flash memory

Data lo in to internal Flash memory 128Mbit (16Mbyte) 2 minute interval for one year of data

128Mbit (16Mbyte) 2 minute interval for one year of data

WiFi plus di ital isolation and UART to USB

WiFi plus di ital isolation and UART to USB WiFi used for remote monitorin ( SBMS acts as AP ) USB for lo data download

WiFi used for remote monitorin ( SBMS acts as AP ) USB for lo data download

Display

Display SBMS0 2.4” ( Color LCD 320x240 )

SBMS0 2.4” ( Color LCD 320x240 )

Wei ht

Wei ht SBMS0 ~150 / DSSR20 ~70

SBMS0 ~150 / DSSR20 ~70

Dimensions

Dimensions 90mm x 70mm x 26mm

90mm x 70mm x 26mm

Self consumption

Self consumption 300mW to 800mW (WiFi and Backli ht ON)

300mW to 800mW (WiFi and Backli ht ON)

Max TDP

Max TDP SBMS0 (3W) / DSSR20 (1.4W)

SBMS0 (3W) / DSSR20 (1.4W)

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1 Install Instructions

Step 1

Connect the included 12 wire cell monitoring/balancing cable to your battery pack. Number 12 wire is the one marked with red.

Any number of parallel cells are no different from a single higher capacity cell so if you have multiple small cells you will need to form first groups

of parallel cells then connect those groups in series for needed voltage. LiFePO4 is the most cost effective battery at the end of 2019 and a 4s with

that will make a 12V battery and a 8s will make a 24V battery.

All configurations from 3s to 8s are shown below. The corresponding wire number is marked with dark gray color (all wires are used).

1+2

10+11+12

4+5+6+7+8+9

1+2

6+7

10+11+12

1+2

5+6+7+8

10+11+12

1+2

5+6+7

10+11+12

1+2

10+11+12

4+5+6+7+8

1+2

10+11+12

3s 4s

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Step 2

Go to Parameter Settings menu and select the type of cell, number of cells and battery capacity then push Store Parameters button to save data to

S MS. Then remove the 12pin connector and reconnect for the new stored parameters to be accepted.

Step 3

You can now remove the 12pin connector and start working on the 8 + 2 pin side connector.

A CAT5 or CAT6 type cable is ideal there as you have 4 pairs of twisted wires and can use one for attery current shunt (ADC1n/ADC1p) then

second one for PV current shunt (Pvn/Pvp) the third one for EXT IO3 (EXTIO3+/EXTIO3-) and last one for EXT IO4 (EXTIO4+/EXTIO4-).

See diagram on page 3 for details and you can even respect the color scheme that I used :) as usually the CAT cables have those colors

rown,Orange, lue and Green.

The XT1+/XT1- is optional but if you want you can connect a battery temperature sensor that will be a 10KOhm Thermistor search for “10KOhm

3950 NTC” and you can find many options and also use a twisted wire pair for this.

All you need to do is strip 4 to 5 mm from the end of the wire and insert in the connector until the stop is reached. To remove the wires

or insert stranded wire insert a needle in the corresponding rectangular hole above the wire as seen in the third drawing below.

secure the cable to the S MS0 or to the front panel the S MS0 is mounted on.

*Screenshots for 4s the diagram on the bottom will

change to reflect the correct connection for different

configurations you select but see the anterior page for

details on all available configurations from 3s to 8s.

Any number of parallel cells are no different from a

single higher capacity cell as all parallel cells will

have the exact same voltage.

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Step 4

Since the CAT5 or CAT6 cable is connected to the S MS0 you can connect the current shunt's.

The attery current shunt is mandatory as it is needed to calculate the battery SOC (State of Charge) and gets connected to attery+ terminal on

one side then on the other side to a fuse or circuit breaker and your Load and chargers.

The PV current shunt will be great to have as it will provide way more info as with just the battery current shunt mentioned above all you see is

battery current and you have no idea of how much the load uses or how much the PV array is producing.

Example: Say you have a 50A load and 30A coming from your PV array then the battery current shunt will see 20A getting out of the battery and

that is only useful to calculate how much energy gets out of the battery and calculate the SOC but you know nothing else.

y adding the PV current shunt now you measure those 30A and so if you add that to 20A getting out of the battery you can calculate the Load and

get the 50A load uses thus you know with two current shunts know all the data and S MS0 can display that for user and calculate the total energy

coming from PV, the energy used by the Load and how much the battery was involved in all this so unless you want to save a few $ I highly

recommend having both current shunt's installed.

Current shunts are nothing more than a power resistor and they may be spec as a max current they can handle and the voltage drop at that current

like say 100A 75mV or as a resistance value and a power rating for the resistor so 0.075V/100A = 0.00075Ohm or 0.7500mOhm (this will be the

number you set in the S MS0) and a power rating 100A x 0.075V = 7.5W

The ADC1n/ADC1p input can read in the -90mV to +90mV range so can read current in both directions while the PVp/PVn current shunt can read

current in a single direction 0V to +90mV thus to best take advantage of this range a 75mV current shunt can be used but 50mV current shunts and

100mV current shunts will also work.

You will want to select a current shunt so that your max continues current is no more than 66% of the shunt rating. As an example if you expect a

2000W max continues load from your 24V battery then 2000W/24V = 83.33A and thus a 100A current shunt will get to hot and you will want a

150A or 200A current shunt. You will also not want to jump to a 500A or 1000A current shunt in this example as then your resolution when you

measure small current will not be that great.

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Step 5

Connect the EXT IO3 set as type 2 to your inverter, large DC/DC converter or for multiple small DC loads to Victron attery Protect or similar

device. Most of you will use an inverter and the inverter will need to support remote ON/OFF and while a lot of them do not all can support that.

Simple rule will be that any inverter with a mechanical single pole single trow ON/OFF switch will be able to support remote ON/OFF compatible

with S MS0 but you may need to solder two wires in parallel with that ON/OFF switch if there is no remote port available on the unit.

Inverters that have a momentary type ON/OFF switch most likely will not support compatible remote ON/OFF but there are a few exceptions.

To test set the EXT IO3 as type 0 and inverter should turn OFF then you can set back on type 2

ellow is just a short list of inverters compatible with S MS0 but way more than this presented here will work.

I think ll Victron inverts re comp tible.

Pheonix, Multiplus, Qu tro

Pheonix 12/500 (~$180)

Pheonix 24/1200 (~$400)

Multiplus 24/3000/70 (~$1300)

BP65 for sm ll DC lo ds (~$40)

The Victron multiplus inverter/ch rge m y

be the only one with sep r te remote for

inverter nd ch rge.

Most Cotek inverts re comp tible.

COTEK SP1000 (~$350)

COTEK SP2000 (~$640)

COTEK SP3000 (~$960)

COTEK SP4000 (~$1280)

Some other inverts th t re comp tible not

sure if spec re re l.

Ronegy 3000W (~$370)

PIP2424HSE - 220V (~$250)

PIP2424HSE c n be used s inverter only

not ch rger nd it is 220V only, the 120V

version is much more expensive.

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Step 6

Connect the EXT IO4 set as type 1 to your charger and that can be the DSSR20 (multiple of them up to 20 no problem and up to 30 if using two

EXT IOx ports) an MPPT solar charger that has remote ON/OFF support as some Victron Smart solar or lue Solar with the adittion of a $20

remote ON/OFF cable or a grid charger that has remote ON/OFF like the RSP-750-15 for 12V battery or RSP-750-27 for 24V battery.

A few battery to battery charger also have remote ON/OFF and can be used but charging from vehicle alternator is 50x more expensive than form

PV so it should be avoided if cost is important to you.

To test set EXT IO4 as type 0 and charging should stop then you can set back as type 1

ellow is just a short list of chargers compatible with S MS0 but way more than this presented here will work.

Electrod cus DSSR20.

This is sure the most cost effective option

for PV sol r ch rging nd llows PV rr ys

from 100W up to 18kW

PV needs to m tch b ttery volt ge so 32

or 36 cells for 12V b ttery nd 60 or 72 cell

PV for 24V b ttery.

DSSR20 (~$27)

Victron MPPT Sol r ch rgers with remote.

BlueSol r 100/20 + remote (~$160 + $20)

Sm rtSol r 150/85-TR (~$680)

Other type of ch rgers.

Ronegy 40A b ttery to b ttery (~$200)

( ltern tor >$1/kWh not recommended).

RSP-750-15 grid ch rger (~$180)

(grid ~$0.2/kWh)

Or +

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2 Thermal Mana ement

The S MS0 and DSSR20 are passively cooled and do not require any heat-sink or active cooling.

DSSR20 has a total of 3.5mΩ internal resistance

So at 20A TDP = 20A x 20A x 0,0035Ω = 1.4W

With 60 cell panels 27V x 20A = 540W and with 1.4W loss it will be a 99.7% transfer efficiency.

Ce manuel convient aux modèles suivants

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