GRUNDFOS DATA BOOKLET

Grundfos RSIRenewable solar inverter for pump control2-50 hp

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Grundfos RSI

1. Product introduction 3General description 3Features and benefits 3Type key 4

2. Applications 5

3. System components 6Pumps 6Renewable solar inverter 6Circuit breaker, AC (optional) 6Sine-wave filter (optional) 6Solar panel 6Dry-running switch 7Circuit breaker, DC 7Combiner box (junction box) (optional) 7Surge protection, DC 7Level switch (optional) 7

4. Technical data 8Dimensions 8Electrical and enclosure data 11Technical data for circuit breaker, DC 11Technical data for surge protection, DC 11

5. Product range 12Renewable solar inverter 12Combiner box (junction box) components kit (optional)

13Dry-running switch 13Level switch (optional) 13Sine-wave filter 13

6. Appendix 14

7. Grundfos Product Center 15

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Grundfos RSI 1

1. Product introduction

General descriptionThe Grundfos Renewable Solar Inverter (RSI) is an off-grid solar inverter converting the DC power output from the solar panel to AC power supply for pump operation.

The RSI can be used in both new and existing systems as long as the motor specifications are compatible and suitable for use with a variable frequency drive.

The list below contains the Grundfos pump types for use in applications with the RSI:

• CR

• SP

• NB, NK

• MTR

• CM

• TP.

Features and benefits

Enclosure class IP66The RSI is designed to achieve enclosure class IP66. This means the inverter is weatherproof and can be installed outside.

Note: Installing the inverter underneath the solar array reduces the cable length to a minimum, reduces power losses and improves the safety conditions.

Setup wizard with Grundfos product libraryThe RSI has a built-in Grundfos product library which allows a plug-and-pump experience. The motor library contains all related parameters that simplifies the setup process to just a few clicks and a setup time of a few minutes.

Detachable control panelThe control panel is mounted on the RSI by a magnet and with a communication plug. The inverter can operate without the control panel and will operate with the last saved setup data.

AC/DC compatibilityThe RSI is AC and DC compatible. The RSI can be connected to the grid or a generator as back-up power during solar panel disruptions.

The AC compatibility also allows the end user to connect the inverter to three-phase power in their workshop for off-site setup which enables a fast and simple on-site installation.

Solar power (DC) and AC power must never under any circumstances be connected at the same time.

To prevent the AC and DC power sources from being connected by accident, we strongly recommend that you use an interlocked changeover switch The switch must be sized according to the RSI power ratings.

Maximum power point tracking (MPPT)The inverter has built-in electronics with four MPPT algorithms. The inverter will continuously optimize according to available solar irradiation as well as various environmental conditions.

Overvoltage and undervoltage protectionOvervoltage and undervoltage may occur in case of faulty installation. The inverter will cut out the power connection to the motor if the voltage falls outside the allowed voltage limits. The inverter will stay in fault mode with the error code displayed on the inverter until the inverter is reset.

Overload protectionOverload may occur if the maximum allowed frequency is set too high or a wrong pump is used. The inverter will cut out the power connection to the motor if overload occurs. The inverter will stay in fault mode with the error code displayed on the inverter until the inverter is reset.

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Overcurrent protectionOvercurrent may occur if, for example, a wrong cable size is used. The inverter will cut out the power connection to the motor if the current falls outside the allowed current limits. The inverter will stay in fault mode with the error code displayed on the inverter until the inverter is reset.

Note: For the overcurrent protection to function properly, the actual current value must be adjusted according to the maximum current attained at the maximum frequency shortly after the system started operation.

Overtemperature protectionThe inverter may be overheated if appropriate ventilation is not available or the ambient temperature is too high. The inverter will cut out the power connection to the motor if overtemperature occurs in the inverter. The inverter will stay in fault mode with the error code displayed on the inverter until the inverter is reset.

Note: The inverter does not detect motor temperature or protect the motor against overtemperature.

No-load protectionNo-load situation of the inverter may occur if, for example, the cable to the motor is broken. The inverter will cut out the power connection to the motor if no-load occurs. The inverter will stay in fault mode with the error code displayed on the inverter until the inverter is reset.

Note: For the no-load protection to function properly, please check the RSI installation and operating instructions carefully during the operation.

Operating history memoryThe inverter will store historical operating data. The data can be retrieved through the menu on the inverter.

Type key

Code Example RSI 0100 3L 0003 4 X HMGR

RSI Renewable Solar Inverter

0100 Product type

3L Three-phase power

00030072

Rated current [Amps]

24

Voltage:208-240 V380-440 V

X Enclosure class IP66

HMGR Option (HMGR: Control panel with graphical display)

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2. Applications

The RSI is designed for continuous as well as intermittent operation. The system is suitable for various water supply systems including irrigation.

The RSI can be used in existing systems with submersible pumps or dry-installed pumps, thus providing a very wide range of applications allowing you to leverage renewable energy sources with the ability to back up the system with grid or generator power.

Application exampleThe water production of an RSI system depends on the availability of solar power. The typical result is excess water production in the afternoon and insufficient water production in the morning and evening. A system equipped with a storage water tank will enable a stable water supply throughout the day.

In a combiner box (junction box), all cables from the solar panels can be connected into one set of power input cables before connecting them to an RSI.

Installation example, submersible pump

Fig. 1 Installation example showing solar panels, solar inverter, submersible pump and water tank

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1 Solar panel

2 Support structure

3 Circuit breaker, DC

4 Surge protection, DC*

5 Combiner box (junction box)

6 Renewable solar inverter

7 SP pump

8 Submersible drop cable

9 Dry-running switch

10 Outlet pipe

11 Water tank

12 Level switch

* If the distance between the solar panel and the inverter is more than 32 ft (10 m), it is necessary to add extra surge protection closer to the solar panel.

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3. System components

An RSI system consists of a three-phase Grundfos motor, an RSI solar inverter, and various protection accessories.

The RSI system components include the following components:

• Grundfos motor

• renewable solar inverter

• circuit breaker, AC (optional)

• circuit breaker, DC

• surge protection, DC

• solar panel

• dry-running switch

• level switch (optional)

• sine-wave filter (optional)

• combiner box (junction box).

PumpsPump requirements for an RSI system:

• The rated frequency can be either 50 or 60 Hz.

• The pump must be able to operate with a voltage supply of 3 x 380-440 VAC or 3 x 220 VAC.

As standard, Grundfos three-phase pumps can only be operated via an AC voltage supply. Therefore, the solar panels must not be connected directly to the pump but must be connected via an RSI.

Fig. 2 Grundfos SP and CR pumps are suitable for RSI systems; the other suitable pump types are NB, NK, MTR, CM and TP

Renewable solar inverterFor a general product description, see section 1. Product introduction.

Fig. 3 Grundfos renewable solar inverter

The RSI combined with various sensors can offer the following functions:

• maximum power point tracking (MPPT)

• DC to three-phase AC conversion

• connection to dry-running switch

• connection to level switch

• operating history inquiry.

Circuit breaker, AC (optional)An AC circuit breaker is a standard circuit breaker used for normal three-phase power connection between the RSI output and the motor.

Sine-wave filter (optional)A sine-wave filter is primarily used for protecting the motor against overvoltage and increased operating temperature. Output filters can also be used for reduction of motor acoustics.

Solar panelThe solar panel offered by Grundfos is specially selected for the Grundfos RSI.

All Grundfos solar panels are equipped with plugs and sockets enabling easy connection. The number of solar panels required depends on the water quantity required, water pressure required and installation location.

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Dry-running switchThe dry-running switch is recommended for submersible pump operation. The switch can prevent the risk of the pump operating in a dry well, which could result in damage of the pump.

Circuit breaker, DC

Fig. 4 Circuit breaker

The DC circuit breaker is suitable for the solar-powered RSI system.

The circuit breaker enables manual starting and stopping of the system. At least one DC circuit breaker is required for each set of solar panels connected in series to an RSI.

Fig. 5 Dimensions, circuit breaker

Combiner box (junction box) (optional)A combiner box (junction box) combines the output of multiple solar panel arrays for connection to the RSI, instead of having an array-to-array cable or exceeding the power range for the cable.

Surge protection, DC

Fig. 6 Surge protection

The DC surge protection is suitable for the solar-powered RSI system.

The surge protection gives a very safe and reliable protection of the system by having a quick response. At least one DC surge protection is required for the DC input of the RSI. We recommend also that you have one DC surge protection for each solar array connected to an RSI.

Fig. 7 Dimensions, surge protection

Level switch (optional)A level switch serves as a start/stop control that depends on the water level in the water tank.

Fig. 8 Level switch

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3.75 in. (95 mm) 3.75 in. (95 mm)

1.36 in. (34.5 mm)

5.90

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1.72 in. (43.5 mm)

2.29 in. (58 mm)

2.56 in. (64.8 mm)

3.35

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2.10 in. (53.4 mm)

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4. Technical data

Dimensions

Fig. 9 Frame A, 2 - 7.5 hp (1.5 - 5.5 kW)

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Frame size

Product

Net weight[lb (kg)]

E [in. (mm)]

W [in. (mm)]

W2[in. (mm)]

L[in. (mm)]

L1[in. (mm)]

L2[in. (mm)]

H[in. (mm)]

H1[in. (mm)]

H2[in. (mm)]

Frame A 19.4 (8.8)∅0.24(5.9)

5.65(143.5)

7.52(191.0)

11.70(297.0)

11.54(293.0)

12.41(315.0)

7.41(188.0)

7.76(197.0)

8.43(214.0)

E

W W2

L1LL2

H H2H1

Frame size

Packaging

Gross weight[lb (kg)]

Length[in. (mm)]

Width[in. (mm)]

Height[in. (mm)]

Frame A683.5(310)

9.85(250)

7.88(200)

11.62(295)

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Fig. 10 Frame B, 10-20 hp (7.5 - 15 kW)

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Frame size

Product

Net weight[lb (kg)]

E [in. (mm)]

W [in. (mm)]

W2[in. (mm)]

L[in. (mm)]

L1[in. (mm)]

L2[in. (mm)]

H[in. (mm)]

H1[in. (mm)]

H2[in. (mm)]

Frame B32.9

(14.9)∅0.24(6.1)

7.09(180.0)

9.18(233.0)

13.74(349.0)

13.60(345.2)

14.49(368.0)

8.04(204.0)

8.43(214.0)

9.10(231.0)

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W W2

H H2

H1

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Frame size

Packaging

Gross weight[lb (kg)]

Length[in. (mm)]

Width[in. (mm)]

Height[in. (mm)]

Frame B683.5(310)

9.85(250)

7.88(200)

11.62(295)

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Fig. 11 Frame C, 25-50 hp (18.5 - 37 kW)

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Frame size

Product

Net weight[lb (kg)]

E [in. (mm)]

W [in. (mm)]

W2[in. (mm)]

L[in. (mm)]

L1[in. (mm)]

L2[in. (mm)]

H[in. (mm)]

H1[in. (mm)]

H2[in. (mm)]

Frame C 69.5 (31.5)∅0.33(8.2)

12.68(322.0)

13.78(350.0)

15.16(385.0)

15.06(382.5)

19.69(500.0)

9.06(230.0)

9.30(236.0)

10.0(254.0)

E

W W2

H H2H1

L1LL2

Frame size

Packaging

Gross weight[lb (kg)]

Length[in. (mm)]

Width[in. (mm)]

Height[in. (mm)]

Frame B683.5(310)

9.85(250)

7.88(200)

11.62(295)

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Electrical and enclosure data

Technical data for circuit breaker, DC

Technical data for surge protection, DC

Voltage 3 x 208-240 V 3 x 380-440 V

Installation environment

Minimum ambient temperature [°F (°C)] 14 (-10) 14 (-10)

Maximum ambient temperature [°F (°C)] 140 (60) 140 (60)

Maximum relative humidity [%] 100 100

Electrical data

DC minimum MPP voltage [VDC] 230 400

DC recommended MPP voltage [VDC] 290-336 530-615

DC maximum input voltage [VDC] 380 800

AC input voltage [VAC] 208-240 380-460

AC rated output voltage [VAC] 220 380-440

Minimum frequency [Hz] 5 5

Maximum frequency [Hz] 60 60

Phases 3 3

Enclosure class IP66 IP66

Voltage, DC [V] 1,000

Current [Amps] 16

Weight [kg] 1.05

Marking IEC 60047

Voltage, DC [V] 1,000

Current [Amps] 40,000

Weight [kg] 0.375

Marking CE

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5. Product range

Renewable solar inverter

Low voltage range (3 x 208-240 V)

High voltage range (3 x 380-440 V)

Power[kW]

Product number

Electrical data

Frame sizeMax. P2[hp]

Max. P2[kW]

Rated output current[Amps]

1.5 99090622 2 1.5 8 A

2.2 99090633 3 2.2 11 A

3 99090634 4 3.0 12.5 A

4 99090635 5 4.0 18 B

5.5 99090636 7.5 5.5 24.2 B

7.5 99090637 10 7.5 31 B

11 99090638 15 11 48 C

15 99090639 20 15 62 C

Power[kW]

Product number

Electrical data

Frame sizeMax. P2[hp]

Max. P2[kW]

Rated output current[Amps]

2.2 99044348 3 2.2 5.6 A

3.0 99044349 4 3.0 8 A

4.0 99044350 5 4.0 9.6 A

5.5 99044351 7.5 5.5 12 A

7.5 99044352 10 7.5 16 B

11 99044363 15 11 23 B

15 99044364 20 15 31 B

18.5 99044365 25 18.5 38 C

22 99044366 30 22 46 C

30 99044367 40 30 61 C

37 99044368 50 37 72 C

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Combiner box (junction box) components kit (optional)The combiner box (junction box) components kit is an optional kit for containing the circuit breaker, DC, and the surge protection, DC, components. For a general component description, see section 3. System components.

Dry-running switchThe dry-running switch for submersible pumps (A) is a float switch for well level control via digital input signals.

The dry-running switch for dry-installed pumps (B) is an ultra-sonic sensor for the detection of water in a pipe.

The switches must be connected to a 24 VDC power supply and a digital input control device.

Level switch (optional)

High water level: The contact is closed.

Low water level: The contact is open.

Sine-wave filter

Description Product number

Combiner box (junction box) components kit, DC 98298572

Circuit breaker, DC 98341686

Surge protection, DC 98341687

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Dry-running switch for submersible pumps (A) 98347579

Dry-running switch for dry-installed pumps (B) 97911215

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Level switch 010748

VoltageMax. P2 to

motor[hp]

Max. P2 to motor[kW]

Product number

3 x 220 VAC

2 1.5 96754973

3 2.296754976

4 3

5 496754977

7.5 5.5

10 7.5 96754978

15 11 96755021

20 15 96755032

3 x 380- 440 VAC

3 2.296754973

4 3

5 4 96754974

7.5 5.596754976

10 7.5

15 11 96754977

20 1596754978

25 18.5

30 22 96755019

40 30 96755021

50 37 96755032

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6. Appendix

The tables below show the recommended cable size to be used between the solar panel and the RSI in order to keep the power loss lower than 2 % at 68 °F (20 °C).

Low voltage range (3 x 240 VAC)

High voltage range (3 x 380-440 VAC)

Current in cable[Amps]

Distance between solar panel and RSI[ft (m)]

98(30)

196(60)

295(90)

393(120)

492(150)

590(180)

688(210)

787(240)

885(270)

984(300)

1082(330)

1181(360)

1279(390)

Recommended cable size[AWG (mm2)]

3 15 (1.5) 15 (1.5) 15 (1.5) 13 (2.5) 13 (2.5) 13 (2.5) 11 (4) 11 (4) 11 (4) 11 (4) 9 (6) 9 (6) 9 (6)

6 15 (1.5) 13 (2.5) 13 (2.5) 11 (4) 11 (4) 9 (6) 9 (6) 9 (6) 7 (10) 7 (10) 7 (10) 7 (10) 5 (16)

9 15 (1.5) 13 (2.5) 11 (4) 9 (6) 9 (6) 7 (10) 7 (10) 7 (10) 5 (16) 5 (16) 5 (16) 5 (16) 5 (16)

12 13 (2.5) 11 (4) 9 (6) 9 (6) 7 (10) 7 (10) 5 (16) 5 (16) 5 (16) 5 (16) 3 (25) 3 (25) 3 (25)

15 13 (2.5) 11 (4) 9 (6) 7 (10) 7 (10) 5 (16) 5 (16) 5 (16) 3 (25) 3 (25) 3 (25) 3 (25) 3 (25)

Current in cable

[Amps]

Distance between solar panel and RSI[ft (m)]

98(30)

196(60)

295(90)

393(120)

492(150)

590(180)

688(210)

787(240)

885(270)

984(300)

1082(330)

1181(360)

1279(390)

Recommended cable size [AWG (mm2)]

3 15 (1.5) 15 (1.5) 15 (1.5) 15 (1.5) 15 (1.5) 15 (1.5) 13 (2.5) 13 (2.5) 13 (2.5) 13 (2.5) 11 (4) 11 (4) 9 (6)

6 15 (1.5) 15 (1.5) 15 (1.5) 13 (2.5) 13 (2.5) 11 (4) 11 (4) 11 (4) 9 (6) 9 (6) 9 (6) 9 (6) 7 (10)

9 15 (1.5) 15 (1.5) 13 (2.5) 11 (4) 11 (4) 9 (6) 9 (6) 9 (6) 7 (10) 7 (10) 7 (10) 7 (10) 5 (16)

12 15 (1.5) 13 (2.5) 11 (4) 11 (4) 9 (6) 9 (6) 7 (10) 7 (10) 7 (10) 7 (10) 5 (16) 5 (16) 5 (16)

15 15 (1.5) 13 (2.5) 11 (4) 9 (6) 9 (6) 7 (10) 7 (10) 7 (10) 5 (16) 5 (16) 5 (16) 5 (16) 5 (16)

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7. Grundfos Product Center

Subject to alterations.

All the information you need in one place Downloads

Performance curves, technical specifications, pictures, dimensional drawings, motor curves, wiring diagrams, spare parts, service kits, 3D drawings, documents, system parts. The Product Center displays any recent and saved items - including complete projects - right on the main page.

On the product pages, you can download installation and Operating Instructions, data booklets, service instructions, etc. in PDF format.

SIZING enables you to size a pump based on entered data and selection choices.

Grundfos Product Center is an online search and sizing tool to help you make the right choice.

http://product-selection.grundfos.com

REPLACEMENT enables you to find a replacement product.Search results will include information on

• the lowest purchase price• the lowest energy consumption• the lowest total life cycle cost.

CATALOG gives you access to the Grundfos product catalog.

LIQUIDS enables you to find pumps designed for aggressive, flammable or other special liquids.

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99135248 1216

ECM: 1188590

GRUNDFOS Pumps Corporation 17100 West 118th TerraceOlathe, Kansas 66061Phone: +1-913-227-3400 Telefax: +1-913-227-3500

GRUNDFOS Canada Inc. 2941 Brighton Road Oakville, Ontario L6H 6C9 CanadaPhone: +1-905 829 9533 Telefax: +1-905 829 9512

Bombas GRUNDFOS de Mexico S.A. de C.V. Boulevard TLC No. 15Parque Industrial Stiva AeropuertoApodaca, N.L. Mexico 66600Phone: +52-81-8144 4000 Telefax: +52-81-8144 4010