Unlike expensive legacy monitoring systems, Ohm is able to directly track the distinction between solar hot water versus back up (gas or electric heated water) to provide a true picture of how much hot water is directly from the sun.
Be sure you are getting the most out of your solar hot water system with proactive alerts and information when it isn't working.
Ohm is the only monitoring system that can measure solar and back up energy input and hot water usage.
Know when the tank is full of the sun to make smart choices on hot water use – when to run the dishwasher, shower or laundry.
Measure solar hot water benefits - green impact, energy savings and return on investment.
Simple plug-in sensor and fast set-up for web or smart device dashboard access. Easy, do-it-yourself add on to almost any solar hot water system.
It is a reference to how our proprietary sensor works: it measures
the resistance to a small current running through the sensor, and that
measurement is translated into the energy readings you see on the Dashboard.
The unit of measure for electrical resistance is… you guessed it, the Ohm!
Is my solar hot water system a fit for Ohm?
Ohm is designed to work with most solar domestic water heating system types,
either as part of a new installation or a retrofit on your
existing solar thermal system. Basic system requirements are:
* Functioning domestic solar water heating system (not for use in monitoring solar pool heating or PV).
* Indoor solar storage tank (here is an example) of 60-119 gallons in capacity.
* High speed internet with home router (cable, wi-fi or otherwise).
The Ohm calculates enthalpy changes in a thermal mass – in this case your water heater. Electrical resistance of the Ohm sensor correlates directly to the average water temperature in the tank, which in turn is a measure of total energy. Ohm’s software is able to distinguish between different types of energy going into and out of the tank, which are presented as the energy readings you see on the Dashboard. The components communicate with one another via the 6lowpan wireless protocol, enabling the zero-configuration attribute of Ohm.
No. It is designed to work in solar domestic water heating systems only.
Yes. The components that are in contact with potable hot water are NSF compliant.
No, although accessing the Dashboard will use up some of your bandwidth like any other application. Ohm uses a different wavelength than any wireless router you may have and so won’t interfere with its operation.
Not at the present time, as the current version is designed for residential applications. Future versions may be developed for larger systems however.
At this present time we are only shipping units within North America.
Yes! You’ll simply need to order a second Ohm sensor with your kit when prompted on the purchase form.
Someone with basic plumbing skills and tools should be able to install Ohm in 30 minutes or less.
Your local solar water heating professional or plumber should be able to install Ohm for a fee. If not, drop us a line and we’ll try our best to find you one.
No, it will not. The Ohm sensor is designed to be installed in a tank’s Temperature and Pressure Relief valve port, which is an important safety feature found in nearly every water heater. Properly installed, the sensor will not interfere with the operation of the T&P valve.
It can typically be found labeled prominently on the side or top of your tank.
Look again! If your tank is compliant with US plumbing code, it will have one. If it indeed does not have one, you may be able to use an available port on the top of your tank for installation of the sensor.
Please contact us if is not readily apparent where and how to install your Ohm on your solar tank. Ohm is not designed to work on “low-boy” solar tanks or thermosiphon systems.
Great! We are interested in working with companies or entities with a substantial presence in solar thermal or are planning on developing one. Drop us a line using this Distributor Form.