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SEA440 - 440 Amp Battery Regulator with bypass divert 2007


SEA440 - 440 Amp Battery Regulator


Extra heavy duty continuous duty relay is complimented by Silver alloy internal contacts  that can handle millions of cycles at very high amp loads without fusing together or sticking! -


"Electro mechanical units like this are impervious to lighting, EMP and static electrical discharges"


"Simple and ultra-reliable" - "A BULLET PROOF SYSTEM"

Cycle Characteristics:

12 Volt Bank - Turns on and starts dumping power at 13.50 volts. Turns off at 12.5 volts (+ - 5%)
24 Volt Bank - Turns on and starts dumping power at 27 volts. Turns off at 25 volts (+ - 5%)
48 Volt Bank - Turns on and starts dumping power at 54 volts. Turns off at 50 volts (+ - 5%)
The +or- 5% variance is caused by differences in diversion load size verses battery bank size.
Many factors can come into play depending on your systems size, load and the age of the batteries.

Novice notes:


A maximum charged 12 volt L.A. battery is 15 + volts and not 12 volts
A maximum charged 24 volt L.A. battery is 30 + volts and not 24 volts
A maximum charged 48 volt L.A. battery is 60 + volts and not 48 volts
  • Battery Regulator-

  • Disconnect Controller-

  • Diversion Load Regulation-

  • First controller that can divert or simply disconnect incoming power without an electrical arc occurring - During wind storms solidstate IGBT controllers can fry!

  • This unit can control up to 10,000 Watts!

  • That's 12 wind turbines or 40 solar panels !

  • Used to prevent battery over charging on / Wind - Solar - Hydro

  • A battery regulator diverts excess power to power some other useful device when ever your battery is full.

Use this excess power to make free hot water or to recharge an auxiliary battery bank, so many uses, just to many to mention! Regulate your BATTERY instead of your wind turbine, solar panels and many other AE devices.

An extremely robust unit! No fancy lights, meters, bells or whistles and therefore draws ZERO power while sensing!

This controller may look fiendishly simple but it took 16 years of testing and custom parts testing in order to make it long lasting and dependable. Both computer board and custom relay contacts made from .999 fine Silver are built to take over 500 Million cycles or about 85 years of switching for the average system. TESTED for 16 years and proven 100% durable!

  • Battery regulator.

  • Charge regulator.

  • Charge controller.

  • Dump load regulator.

  • Diversion load regulator.

  • Versatile raised steel mounting plate.

  • Measures 10"long by 8" wide by 3" tall..

  • Works for all Wind Turbines, Solar and Hydro.

  • For all voltages ranges in multiple battery banks.

  • No grounded IGBT's - Lighting strike proof isolation.

  • 100% electrically efficient. Draws ZERO power while sensing!

The modern way to monitor your battery from over charging is to have a diversion load that performs another task such as heating water when your battery is in danger of over charging. Shutting down the output of your wind turbine or your other renewable energy devices is old school thinking. Now-a-days most people dump their excess power into some other legitimate device optimizing their energy independence. Hot water from your excess power can be used for radiant heating in the winter or even in the hot summer months for washing cloths or dishes and for bathing. You will always find a need for hot water in your life.

Work great on battery banks

Work great on battery banks built up from many smaller batteries! It only requires to read (sense) the voltage across any 12 volt power point in order to regulate any voltage battery bank! 6, 12, 24, 36, 48 and 60 volt.

Works for all 12, 24, 36, 48 and 60 volt battery banks by simply sampling power from the 12 volt section and mathematically derives the total voltage of the entire battery bank.

If you want your batteries to cycle at higher voltage levels you can put a 10 to 1000 ohm / one watt resistor in line with the green sensor wire and trick the SEA440 into higher voltage / charging ranges. This may take a little experimentation to choose the right resistor to get the cycle style you need but it is an effective and simple way to make the SEA440 perform versatile applications. (10 to 1000 ohm / one watt resistors are common Radio-Shack® parts)
Trouble shooting:
  1. It is VERY important that the slave sensor leads are NEVER to be exposed to the direct high frequency voltage of the wind turbine or PMA when NOT electrically tied down to a battery in the full circuit! The Red and Green wires are ONLY to be placed directly on your battery and NEVER directly to ONLY a wind turbine or PMA!

  2. BATTERY AGE - Old batteries with dirty or corroded terminals can cause many sensing problems for the SEA440. Clean the terminals with a wire brush until they shine brightly! Reconnect and enjoy your new found dependability!

  3. BATTERY GROUPING - Never mix and match batteries in your bank!!!!!!!!!!! ALL batteries in your battery bank must be of the same type and size but they especially must be the same age!!!!! Having an old, mismatched or shorted battery in the group causes extreme havoc!!!!!!!!

  4. BATTERY DISCHARGING TO LOW - If your dump load is very small batteries tend to drain deeper. The simple solution is to use a diversion load that pulls more amperage. Larger loads tell the controller to turn off earlier in the load diversion load cycle leaving the batteries topped off a little higher.

  5. LOAD - If the load exceeds 440 amps the relay contacts may fuse (weld) together. The result will be a drained battery. We highly recommend you install a 440 amp fuse inline with the power LOOP to prevent this. Make sure all connections are clean and tight before wind or solar power is put into the battery and regulator. Make contact with the battery at all times!

SEA440 - 440 Amp Battery Regulator instructions


Contact Us:

Call: +44(0)1234 841221          

E-mail: [email protected]




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                                Last updated - 07/05/2019