The 7 Best Solar hot water controllers (2023 reviews)

• Date : August 21, 2023
• Categories : Solar And Wind Power

We consider a solar hot water controller to be a worthy investment in the long run. We are here to help you choose the right one for your purposes from all the best available products in market today.

Our review process: Show/Hide

Our Top Picks:

Best Overall: Buy: Orbit Solar hot water Controller READ REVIEW

Best For boat: Buy: ecoworthy Solar hot water Controller READ REVIEW

Best For Solar System: Buy: Powmr Solar hot water Controller READ REVIEW

Best For Solar On The side Charging: Buy: Renogy Solar hot water Controller READ REVIEW

Best For Pet: Buy: Sun Energise Solar hot water Controller READ REVIEW

Best For differential Controller: Buy: Samfox Solar hot water Controller READ REVIEW

Best light Weight: Buy: Newpowa Solar hot water Controller READ REVIEW

Best Overall: Orbit Solar hot water Controller

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The orbit solar hot water controller should be able to handle its purpose and duties with ease. It is the cutting-edge commercial and agricultural counterpart of orbit, featuring built for speed offerings that are engineered specifically for professional contractors and growers. It makes it so easy to test all your irrigation zones without having to run back to the timer itself. It has smart watering functions and you can also easily program it.

The controller has a swing panel that allows easy access to the wiring terminals. It allows the application to set up the watering times automatically. It is easy to water one area or start a whole manual cycle. The device itself is easy to install and comes in its own weatherproof enclosure. It is a one piece assembly in a weatherproof box for indoor or outdoor mounting.

• Solid built, strong material, good function
• Easy setup, easy control, no manual needed, orbit wins this round, no questions asked
• Very user friendly, automatic rain detection from weather report or optional rain sensor
• Can be installed outside and comes with locking key box

Best For boat: ecoworthy Solar hot water Controller

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Not everyone likes to purchase controller for their daily usage, but the ecoworthy solar hot water controller would be an anomoly. The solar panel and charge controller form a basic off-grid solar kit for charging and maintaining 12v batteries, such as sealed lead-acid, lithium, lifepo4, gel, flooded and agm batteries. It actually keeps a deep cycle battery charged very well. The control box has lugs that you insert stripped wires and then tighten screws to hold them.

The solar panel is only 25W, and under sunny conditions, it may generate 100Wh of electricity one day. It has backflow protection and can be connected permanently.

• Great solat manel lots of power for a small panel
• Charges batteries then goes into "float mode" to maintain them
• Controller which offers a usb output as well

Best For Solar System: Powmr Solar hot water Controller

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The powmr solar hot water controller should be able to handle its purpose and duties with ease. A True MPPT solar charger is rated max at 48v battery ( Lithium self defined voltages) at 2, 800w Max Solar Array & 150 Voc. It is designed to control the amount of charge allowed into a battery. It will convert what ever comes to the 12 volt you need on the batteries.

This design allows two smaller sized wires for input and output instead of one big one. There are 2 connections on the unit going to the batteries, then one on the left puts out about half the Load coming in from the Solar Panels, the other about half that. It's important that the battery voltage reading is accurate to ensure being able to fully charge the pack.

The battery voltage comes from your solar panel in order for this to work properly. It is good for small projects and well ventilated areas that remain dry.

• Double lug connections for power terminals
• Very light weight and minimal internal components
• Runs 24-7 fed from 3 320watt solar panels
• Gives pretty minimal info on the screen, but is useful

Best For Solar On The side Charging: Renogy Solar hot water Controller

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We know from years of feedback from readers, customers and amazon sellers, what most people want in a convenient and appropriate controller. The renogy solar hot water controller is exactly that - it's a simple controller that hits all the right notes. The voyager controller has multiple intelligent protections against reverse polarity, over charge, short-circuit, reverse current, overload, and over discharge, keeping your battery fully protected. It can automatically sense 12v or 24v system voltage when paired with a gel, agm, or flooded batteries. It offers useful functionality once set up.

The voyager comes with an LCD display showing accurate and timely information including charging current, generated energy, temperature, battery voltage, and error codes that allows users to monitor and control charging. It is 100% waterproof, completely sealed off, a nice feature to have. It is easy to use screw terminals on the back side. It is helpful for optimal charging, but note that the sensor won't do anything if lithium is selected, it must have it's own BMS. The waterproof feature is very handy for keeping everything charging during a sudden downpour.

• More dragging 100's of feet of extension cords around
• Works great, easy to install, easy operation
• Easy install of wiring and setup

Best For Pet: Sun Energise Solar hot water Controller

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The sun energise solar hot water controller should be able to handle its purpose and duties with ease. This one by far moves the most air, is quiet and has a weather vent cover that automatically open and closes with operation. The solar power fan kit can move some of the superheated air near the roof out of the building. The connector between the solar panel and the fan is waterproof, and the switch is waterproof too. It moves a decent amount of air.

The solar exhaust fan blows the high temperature in the greenhouse to the outside by rotating to achieve the effect of air circulation in the greenhouse. It is great to keep air moving in this closet and get everything dried out. The solar powered fan kit is powered by solar directly, it goes with a switch to control the on/off for the fan. It is recommended to cover the fan to prevent rain damage.

• Nice fan, powers on with fairly minimal light
• Nice to have a fan that's running off solar
• New and hot release

Best For differential Controller: Samfox Solar hot water Controller

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Compared with other controller in this category, the samfox solar hot water controller has a convenient design. It is a mechanical device ideal for maintaining temperature balance and heating. It can be used in solar water heaters, and the output is controlled by temperature difference and temperature. The power transistors will still switch 110v ac. It has a solid structure, low noise and stable working performance. The unit will turn on and read the thermometers with only 110v input, but it will not fire the relays. It will control the heating system and automatically makes water temperature stay in temperature deference range. It does require a 220v input to power the unit. It has reliability and miniaturization, good maintainability and interchangeability.

• Has quite a number of parameters and depending on your application could be
• Good investment for long term

Best light Weight: Newpowa Solar hot water Controller

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The newpowa solar hot water controller might be a relatively new release, but it's still nothing short of impressive this year. These are connectors of a particular type and are meant to be plugged into male and female receptacles. It is perfect for off-grid applications, such as gate openers, fences, security cameras and lights. It comes with some tape over the ends of wires, or caps, etc. It is easy to use with the proper battery and power controller.

The Glass is thin, yet durable, and you have to know panels from the old school era, this is so light and easy to handle. It is enough to run the autopilot and a bit left over. It gets hot fast and will not last long.

• Sturdy construction and easy to install
• Charges the motorcycle battery every day, even on shorter days and cloudy days
• Built a portable solar powered fence charger for livestock fencing
• Very efficient use of sunlight to deliver power