Solar DC Circulation Pump Topsflo TS5 15PV

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Price: $70.00    

Product Feature

• Operate your Heliatos Solar Water Heating System with the Topsflo TS5 Series 15PV Solar DC Circulation Pump, designed for use in solar water heating systems.
• 1/2" NPT (US Standard) Threads on both sides
• Brushless, Sealless, Extremely Long Life, Rated at 30,000 hours
• Designed to run directly on Solar Electric Panel
• Can Run With Hot Water (212 deg F) and at High Pressure (145 psi)

Product Description

This pump can be powered directly from a PV Solar Panel or any 12V source.
It can operate at up to 212 degrees and 145 psi, so it is perfect for solar water heating systems as well as a host of other applications in homes, cars, boats, and RV's that require high temperature and pressure capability, or anywhere where connection of your plumbing system to hazardous grid power voltages is not desirable.

Areas of Use:
Solar Water Heating Systems
Hot Water Circulation
Radiant Floor Heating
Heat Transfer Applications
12V Operated Cooling Systems
Liquid Transfer
General Purpose Pumping


Main Features:
Can Run With Hot Water (212 deg F) and at High Pressure (145 psi)
Brushless - no Brushes to wear out
Extremely Efficient, only 2 Watts starting power
Sealless Design for Extremely Long Life, Rated at 30,000 hours
Advanced Magnetic Drive Technology
Durable Permanent Magnet Rotor/Impeller
Ceramic Shaft
Can Operate Continuously
Whisper Quiet Operation, less than 45dB
1/2" NPT (US Standard) Threads on bot Sides

Technical Specs
Voltage Range 8V-24V
Nominal Operating Voltage 12V
Maximum Fluid Temperature 212ºF
Maximum Fluid Pressure 145 psi
Operating Noise < 45dB
Minimum Start-Up Power 2 Watts
Maximum PV Panel Output Power 15 Watts
Maximum Head 10 ft.
Maximum Flow Rate 3 gpm

Solar DC Circulation Pump Topsflo TS5 15PV Review

I recently replaced a burned-out Grundfost 110 volt pump with a 10PV Topflo for my (25 year old?) solar water heater system. I used 2 five-watt PVC panels ("Instapark 5W High-Efficiency Mono-Crystalline Solar Panel", $22.95 each, which are better priced than one 10w panel!) and later removed one of them since it runs adequately on one. Since I no longer need the controller/sensors (the pump and the panels work in harmony together only when the sun is up), I cut the wire from the solar panel sensor and used it as power line between the PVC panel and the pump without having to run new wire from the roof down. I position the PVC panel so that it would only power the pump when the sun is high enough to heat the water in the panels. We are in Hawaii and it works well for my 2 large panels with 120 gal tank, giving us more hot water than we need for 3 people and occasional guesses. I have turned off electricity completely to the system (from the circuit breaker) since the timer, controller, 110v pump and water heater are no longer needed (will turn on only on rainy days)! My panels are on the roof of our 2 story house and the tank is on the lower floor (more than 6 m in Ht apart) and it works fine since these pumps are used as circulating pump, not pumping water from a well or pond where one would need the adequate power (correct head).
I will give it 5* when it continues to work for a few month. I ordered it for the price ($56.67) and its "food grade" (?) material even though it looks somewhat flimsy (the ad picture from another seller showing gold-color housing could mislead one to think it is made of brass).
I would recommend this or other PVC-powered pump for most solar water heater system, which would provide zero emission and complete independence (off grid).

***18Nov2012: (6 month update) I now give it 5* since the pump is still working well on one 5-watt PVC panel, providing more hot water (automatically without electricity) than the old (more powerful) electric pump. I think all solar hot water system installers should consider this off-grid (totally energy-independent) setup which is simple, self-regulating: the pump runs only when the sun is up without the need of an expensive controler/sensor. I have not needed to turn on the circuit breaker since this installation 6 months ago, even during a few rainy days. One can put a shade by the (PV panel) to allow the pump to run only when the sun is high enough to heat the water panel.

*** 2Sep2013: It has been 16 months and the pump is running well and quiet. I would buy another one as spare if the price had not gone up! Again, I would strongly recommend a PV ready pump like this one for a solar water system. It can be hook up directly to the PV panel without the need for a controller (as when one connects a rechargeable battery to the PV panel)

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