phocos CIS-MPPT 85/20 Charge Controller
Dear Customer,
Congratulations on buying your Phocos product! Please read the instructions carefully and thoroughly before using the product. It comes with a number of outstanding features, such as:
- Maximum Power Point Tracking technology, which increases the efficiency of your PV system
- The CIS-MPPT 85/20 charge controller can optimally charge batteries from 60-cell PV panels that have primarily been designed for grid connected systems. (One panel for 12V systems or two panels in series for 24V systems)
- Negative grounding
- Dimming function
- Case protection: IP68, in 1.5 m deep water 72 hours
- Control unit (CIS-CU) to configure CIS-MPPT 85/20 charge controller, via infra-red data link
- External temperature sensor for temperature compensation of charging voltages
- 4 stage charging (main, boost, equalization, float) for flooded battery; 3 stage charging (main,boost, float) for sealed battery
- Automatic recognition of system voltage 12/24 V
- Widely programmable
General Safety Information
- This manual contains important installation, set up, and safety operating instructions.
- Please read the instructions and warnings in this manual carefully before beginning any installation.
- Please do not disassemble or attempt to repair Phocos products. Phocos charge controllers do not contain user serviceable parts.
- Please observe all instructions with regards to external fuses/breakers as indicated.
- The information contained in this manual must be observed in its full extent. The manual contains information regarding installation, set up, and operation.
- Please read this manual carefully before using the product, and pay special attention to the safety recommendations in it.
Maintenance and installation notes
- When installing or working on the PV system, please disconnect the PV (solar) modules from the charge controller first, to prevent any damages to the charge controller!
- Please verify that all cable/wire connections are done properly and well insulated and that no water or humidity can ingress that is to avoid any bad or loose connections that would result in excessive heating or further damage.
- Please install a fuse or breaker near the battery before installing or adjusting the controller!
High voltage risks
- Never touch any electrical conductors to avoid electrical shock.
- Never work on live (energized) electrical equipment.
- When working around a battery, do not allow tools to bridge the battery terminals, or short-circuit any part of the battery.
- Use only tools with insulated handles.
- Operation of this device may produce a high voltage which could cause severe injuries or death in case of improper installation or operation of the device.
- PV modules can generate high DC voltages!
Mains and charging current risks
Make sure the cables are always connected to the correct terminal. An electrical shock can be lethal. In general, any electric shock can be dangerous to your health.
CE labeling
The product is CE-compliant.
Connecting and Grounding
- Connect wires in indicated order 1 2 3 4 5 6 7 to avoid any installation faults
- To avoid any damaging voltage on the wires, first connect the wire to the controller, then to the battery, panel or to the load
- Minimum recommended wire size: 10 mm²
- Make sure the wire length between battery and controller is as short as possible
- Be aware that all negative wires of CIS-MPPT 85/20 are connected together and therefore have the same electrical potential. If any grounding is required further to the casing, always do this on the negative wires.
- Grounding of the casing is done by the grounding post on the left side.
| Function | Cable marker | Wiresize(cro section) | Color | |
| ① | Negativebateryterminal | COMMON- | AWG13(2.5mm2) | black |
| ② | Positivebateryterminal | BATERY+ | AWG13(2.5mm2) | red |
| ③ | Negativepanelterminal | COMMON- | AWG13(2.5mm2) | black |
| ④ | Positivepanelterminal | SOLAR+ | AWG13(2.5mm2) | yellow |
| ⑤ | Negativeloadterminal | COMMON- | AWG13(2.5mm2) | black |
| ⑥ | Positiveloadterminal | LOAD+ | AWG13(2.5mm2) | orange |
| ⑦ | Dimmingsignalterminal | – | AWG24(0.25mm2) | black |
LED indications & Warning Functions
Night-Light Function
The CIS-MPPT 85/20 controller comes with a sophisticated night-light function. It controls the load output at night and also is widely programmable.
3 operating modes are available:
Standard Controller, Dusk to Dawn and Evening/Morning.
“Middle of night” is automatically detected as the midpoint between dusk and dawn; no setting of a clock is required. It may take several days until the controller has “learned” the middle of the night precisely. “Middle of night” may be different from 12:00 midnight depending on your location/longitude. The controller recognizes day and night based on the solar array open circuit voltage. The day/night threshold can be modified according to your local light conditions and the type of solar array used.
Dimming Function
- Output voltage 0 V to 10 V relative to battery minus pole (adjust step 1 V, 3% tolerance)
- Impedance 1,000 Ohm
- Load hours (load 1 on CIS-CU case printing) and Dimming hours (load 2 on CIS-CU case printing) work together to effect the dimming function:
No dimming Dimmingison Load of Load hours on on of Dimming hours on of N/A Dimming output voltage 10V Voltage proportional to adjusteddimmingvalue 0V - Corresponding relationship of ‘Output voltage’ and ‘Dimming value’
Outputvoltage 0V 1V 2V 3V 4V 5V 6V 7V 8V 9V 10V Dimmingvalue* 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 10%
* : +/- 3% tolerance
Testing Function
Pushing the test button on the CIS-CU (Control Unit) will switch on load terminal for 1 minute. Should pressing the button cause a load disconnect event (LVD/SOC, over current) than the load will be switched off immediately.
Safety Features
| PV terminal | Batery terminal | Load terminal | |
| Reverse polarity | Protected(1) | Protected | Protected(2) |
| Shortcircuit(3) | Protected | Protected(4) | Switches of immediately |
| Overcurrent | Limited | – | Switches of with delay(5) |
| Reverse current | Protected(6) | – | – |
| Overvoltage | Max.10V(7) | Max.75V | Switchesofabove15.5/31.0V |
| Undervoltage | – | – | Switches of |
| Overtemp. | Reduces the charging current if over temperature ocurs and switches of the load if the temperature reaches high level. | ||
- Panels are short-circuited by diodes. So there is a limited time the controller can be subjected to these conditions. A Battery connected to the panel terminals in reverse polarity will instantly cause a damage to the controller.
- Controller can protect itself, but any connected loads might be damaged.
- Short circuit: >3x – 20x nominal current.
- Battery must be protected by a fuse, or it might be permanently damaged in case of short circuit.
- >200% nominal current: disconnect with 3s delay,
>150% nominal current: disconnect with 10s delay, >110% nominal current: disconnect with 120s delay. - MPPT switches off when detecting reverse current.
- At voltages above 85V the MPPT will stop charging.
WARNING: The combination of different error conditions may cause damage to the controller. Always remove the fault condition before you continue with connecting the controller!
Low Voltage Disconnect Function
- State of charge controlled (SOC): Disconnect at
11.00/22.00 V to 11.70/23.40 V(SOC1), 11.12/22.24 V to 11.76/23.52 V(SOC2), 11.25/22.50 V to 11.83/23.63 V(SOC3), 11.38/22.72 V to 11.89/23.78 V(SOC4), 11.51/23.02 V to 11.96/23.92 V(SOC5), 11.64/23.28 V to 12.02/24.04 V(SOC6).
Voltage controlled (LVD): Disconnects at a fixed voltage between 11.0/22.0 V and 11.9/23.8 V (Voltage steps 0.1/0.2 V).
Note: Battery voltage must be below adjusted setting for longer than 2 minutes for LVD to take effect. Note: Voltage levels before/after the slash are valid for 12 V and 24 V systems respectively (valid for the charge controllers presented in this manual).
Factory Settings
You can configure CIS-MPPT 85/20 charge controllers via the Remote Control Unit (CIS-CU). See CIS-CU manual for details.
| Factory setting | |
| Load more | Standard controller(nightlight of) |
| Lowvoltagedisco next | SOC4 |
| Battery type | Gel |
| Nightlightlevel | 8.0/16.0V(1) |
| Load1eveninghours | 0h |
| Load1morninghours | 0h |
| Dimmingeveninghours | 0h |
| Dimmingmorninghours | 0h |
| Dimmingvalue | 50% |
(1) PV panel open circuit voltage: Day level = Night level + 1.5/3.0 V
Night light level
The controller recognizes “day” and “night” based on the solar PV array open circuit voltage. The daylight threshold can be modified according to the requirements of the local conditions and the solar PV array used.
To find the exact values, we recommend measuring the PV solar array “open circuit voltage” at twilight and when the controller is expected to switch the loads “on” or “off”. This value (the closest setting available) can then be set according to the description presented in the programming section.
Technical Data
Note: The voltage levels before/after the slash are valid for 12 V and 24 V systems respectively.
| TechnicalData | CIS-M PT85/20 |
| Systemvoltage | 12/24 V auto recognition |
| Max.chargecurent | 20A* |
| Max.loadcurent | 20A* |
| Max.PVinputpower | 250W@12V,50W@24Vsystem |
| Powerconversioneficiency: | Upto98% |
| Floatcharge | 13.8/27.6V(25°C) |
| Maincharge | 14.4V(25°C),0.5h(daily) |
| Bostcharge | 14.4/28.8V(25°C),2h Activation:bateryvoltage<12.3/24.6V |
| Equalization | 14.8/29.6V(25°C),2h Activation battery voltage<12.1/24.2V (atleastonetimeevery30days) |
| Overvoltageprotection | 15.5/31.0V |
| Depdischargeprotection, Cut-ofvoltage | 1.0-12.02/2.0-24.04VBySOC 1.0-1.9/2.0-23.8 V By voltage (adjustable step0.1/0.2V) |
| Reco next level | 12.8/25.6V |
| Undervoltageprotection | 10.5/21.0V |
| Max.PV voltage | 85V |
| Min.PV voltage | 17/34V |
| Max. bateryvoltage | 75V |
| Temperature compensation (Charge voltage) | −4.2mV/Kpercel |
| Self-consumption(idle) | 7–15mA |
| Grounding | Negative grounding |
| Ambien temperature | −40to+60°C |
| Max. altitude | 4, 0mabovesealevel |
| Battery type | Lead acid(GEL,AGM,flooded) |
| Adjustment range: Evening hours Morninghours Nightdetection Daydetection | 0–15h 0–14h 2.5–10.0V/5.0–20.0V(adjuststep0.5/1.0V) 4.0– 1.5V/8.0–23.0V(adjuststep0.5/1.0V) |
| Wire length | 20cm |
| Dimensions(WxHxD) | 150x128x42mm |
| Weight | 1050g |
| Wirecro section | AWG13(2.5mm2) |
| Type of protection | IP68(1.5m,72h) |
| Dimmingoutput | CIS-M PT85/20 |
| Dimmingvalue | 0–10%outputpower(adjuststep10%) |
| Dimmingoutputvoltage | 0Vto10V relative to battery minus |
| Impedance | 10 Ohm |
** : At 60°C CIS-MPPT 85/20 can only have full current on panel or load, not simultaneously.
Liability Exclusion
The manufacturer shall not be liable for damages, especially on the battery, caused by use other than as intended or as mentioned in this manual or if the recommendations of the battery manufacturer are neglected. The manufacturer shall not be liable if there has been service or repair carried out by any unauthorized person, unusual use, wrong installation, or bad system design.
Subject to change without notice. Version: 20141113 Made in one of the following countries:
Germany – China – Bolivia – India
Phocos AG – Germany
www.phocos.com
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