SolarHotty PV Water Heater Controller

Converts photovoltaic (PV) solar power into electrical energy that is compatible with powering an existing standard AC geyser installation. SolarHotty has a patented innovation to allow the standard AC thermostat to utilize the supplied voltage (AC or DC) [Patent pending: 2017/00889 and GB1610106.5]. The electrical wiring interface to the geyser is the only change you will need to make to the existing installation.

SolarHotty Features

• 200-240V 50/60Hz Mains AC Supply.
• No battery or inverter needed.
• Works on a standard geyser AC thermostat.
• Automatic switching between AC and PV DC sources depending on solar level.
• PV supply from one or more series-connected solar panels (Refer to Images above).
• Automatic maximisation of PV power using inbuilt.
• Maximum Power Point Tracker (MPPT).
• Rugged steel housing PV DC supply short-circuit protection against geyser element load failure.
• LED indicators for fault indication and PV supply indication.
• Protection against PV panel reverse-polarity.
• Easy mounting to roof beam provided by pre-drilled bracket.
• Zero configuration installation.
• Continual monitoring of health and integrity with failsafe operation.

A Certified Solution

• The SolarHotty product has been certified to:
• SANS/IEC 60669—1:2007,
• SANS/IEC 60669—2-1:2009 — Electronic Switches for household fixed-electrical installations.
• Certification of Compliance with SANS 10400 XA2 in accordance with SANS 10252-1.

All wiring and fitment standards as per national standards

• Electrical: SANS 10142—1:2017 Edition 2: Part 1
• Solar panels: SANS 10142—1:2017 Edition 2: Part 1 SANS/IEC 60364——7—712: Edition 2, 2017-04: Part 7—712.

SolarHotty Specifications

• Enclosure Ingress rating: IP50.
• Enclosure: Enamel plated mild steel.
• Suitability: Installation in a roof or protected electrical environment.
• Humidity: 10-90% RH (no dew condensation).
• Temperature: -20°C to +55°C.
• Standard: IEC 60669-2-1:2009.
• Power supply: 200-240V 1ph 50/60Hz; up to 4kW geyser feed through; 11VA burden.

Solar PV supply

• PV panel string not exceeding a total of 1500W.
• Same specification for each panel in the string.
• PV panels in a series-only connection.
• PV string Maximum PV Voltage and Maximum PV Current must not exceed the specifications below.
• Maximum PV Voltage: 240V (i.e. total series connected open-circuit PV panel voltage).
• Maximum PV Current: 9 A (i.e. total connected short-circuit PV panel current).

System protection

• PV DC supply short-circuit protection.
• PV DC reverse polarity protection.

LED Legend
Green LED (POWER SOURCE)

• Fast-flashing (100ms on / 100ms off): performing self-tests.
• Slow-flashing (500ms on / 500ms off): supplying AC to the geyser element.
• On: supplying PV DC to the geyser element.

Red LED (FAULT)

• Flashing (500ms on / 500ms off): PV panels connected in reverse polarity.
• On: Fault – either element short circuit or other faults.
• Off: No detectable fault.