Hot Water Diverter Comparison Table
Last Updated: 23rd Jan 2023
Below you’ll find a list of all the solar hot water diverters available on the Australian market that we know of, along with price information and technical specifications.
A PV hot water diverter is a device that enables you to use surplus electricity generated by your solar power system to heat water. Find out more about what a hot water diverter is, how it works and whether you should buy one here. You can also read an in-depth comparison and review of the different solar diverter models here.
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Hit ‘Expand’ for fullscreen. Scroll within the table to see all the rows and columns. See notes below the table. Any corrections, additions or feedback? Email us. |
| Product Name | CATCH Power Green Gen2 | Fronius Ohmpilot |
AC THOR i
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Myenergi Eddi | SolarEdge Home Hot Water Controller |
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| Manufacturer Logo |
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| In-Depth Analysis | Yes, here | Yes, here | Not yet | Not yet | Not yet |
| Price (RRP + GST, unless otherwise stated) | $795 | $1,700 | $1,430 (discounted price for >1 unit) | $995 | $850 |
| Website | here | here | Here | here | Here |
| Maximum heating element capacity | 4.8kW | 3kW (single phase) /9kW (three phase) | 2x3kW | 3.68 kW | 4.8kW |
| Number of heating load outputs | 1 | 1 (single phase) 3 (three phase) | 1 output + Relay output | 2 | 1 |
| Sensor connection (Wireless/Wired?) | N/A | Wired |
Option 1: Connection via Router Option 2: Direct connection (wired) Option 3: Connection via powerline Not required when controlled by inverter or EMS Not required in off-grid |
Wireless | Wireless |
| Control method | Burst Fire | PWM | PWM (pure sine) | PWM | TBD |
| Works with a time-of-use tariff's off-peak rate? | Yes | Yes | Yes | Yes | TBD |
| IP Rating | 2X (no protection specified against water) | IP54 | IP20 – external enclosure for IP65 rating costs extra | IP 20 | IP65 |
| Ambient temperature range | -5 to 50 deg C | 0 – 40 deg C | 0 – 40˚C | -20°C to +40°C | -10 to +50 deg C |
| Special features? | No | Monitoring through Fronius solar.web – can see performance all in one place |
Works On-grid and Off-grid (supports frequency shift). Up to 11x ACTHOR (66kW) with 1 P. meter Cloud Monitoring and remote control Compatibility with many manufacturers (EV chargers, smart home, battery, inverter, etc) and different communication protocols (e.g. modbus TCP/IP) |
TBD | Monitoring through SolarEdge app |
| Weight | <1kg | 3.9 kg | 1.5kg including lead | 4.3 kg | 5.3kG |
| Dimensions (mm) | 100x110x50mm | 350 x 280 x 110 mm | 135 x 195 x 65 mm | 220 x 205 x 87mm | 375mm x 240mm x 110mm |
| Standby power | <5W | 1.8W | <1.5W | 3W | <5W |
| Warranty | 5 years | 2 years | 2+3 Years | 3 years | 5 years |
| Datasheet Supplied? | Yes | Yes | Yes | Yes | Yes |
| Warranty Supplied? | Yes | Yes | Yes | No | Yes |
| Modern slavery statement or forced labour policies? | TBD | Yes, here. | TBD | Yes, here. | Yes, here. |
| More information on brand | Here | Here | Here | Here | Here |
Notes
Maximum heating element capacity: The highest capacity hot water system heating element the diverter can be used with. (Water heating elements normally come in the following capacities: 1.8, 2.4, 3.6, and 4.8 kilowatts.)
Number of heating load outputs: Most people will only want to use their diverter for hot water and nothing else. However, if you have a second hot water system you want to use on the same diverter, or potentially something else with an appropriate heating element, such as a bar heater or floor heating, then you’ll want two heating load outputs.
Sensor Connection: All diverters have a sensor that goes just before or just after the electricity meter so it can tell if surplus power is being generated. Some have a sensor that is connected to the diverter with a wire, while others have the option of a wireless connection.
Control Method: The controllers chop up the AC waveform to regulate how much electrical power is transferred into heating power. There are various ways to do this ‘chopping’ as described by this row.
Special features/Internet connectivity: Internet connected PV diverters can access weather forecasts in order to intelligently control their operation for maximum solar self-consumption.
Modern slavery/forced labour: This row indicates if we found the solar diverter manufacturer has policies for addressing modern slavery/forced labour risks. TBD indicates this is yet to be determined and “failed to respond” indicates our enquiries did not receive a reply. Where provided, in-depth analysis of a solar diverter manufacturer’s statement/policy has not been performed.
We plan to update this table frequently as more products become available, and specifications and prices of existing solar diverters change. Please note the prices listed above are just a general guide.