Replacement for Shindengen SH847

About the Shindegen SH847 regulator

   The Shindengen SH847 is an excellent serial three-phase 50A voltage regulator for sports motorcycles (rpm>8000). It controls the rectification with 6 thyristors, so there is no problem with voltage regulation at high frequencies of the three-phase generator. It is sold with cables and connectors. The dimensions are 119*100*38mm. However, the price of the complete set is quite high (299,95$), there are many black copies, and there are not many sellers. Motorcyclists are trying to find a more affordable replacement. We found that they use Polaris regulators, RMSTATOR Can-Am Outlander 570 replacement regulator (152,89$), RMSTATOR REGULATOR RECTIFIER SERIES SUZUKI DL1050 VSTROM DL1000 VSTROM OEM 32800-31J00 RMS020-107516 (174€) and so on. RMStator states in the specification "Maximum Charging Current: 50 A / 500 W". When 500W is divided by 14.5V, only 35A of current is obtained?? SH847 is also sold as an OEM for a Suzuki 2015 DL1000 SH847 Series R/R PN 32800-31J0. In Germany, the "original" SH847 can be purchased for €214.95 + €26.95 connectors. The SH847 does not come with a factory manual or product description with specifications. There are no descriptions and technical documentation on Shindengen's website either (except for the dimensions and block diagram of the electronics). Another serial regulator from Shindengen, SH775, is 35A and significantly cheaper and smaller, but unfortunately, it is not suitable for speeds above 8000 rpm. Our replacement for SH775 is 14V-3FHV-30A-B-LI .

Our recommendation is the HVSP regulator

    Our replacement for SH847 is slightly less powerful. It is a robust hybrid serial-parallel(shunt) regulator up to 30A: standard 14V-3FHVSP-30A-AX-KS-LI (142*88*25mm), for AGM batteries 14V-3FHVSP-30A-AX-K2-LI (142*88*25mm) i standard for quads 14V-3FHVSP-30A-BX-KS-LI (142*88*35mm). Although the HVSP regulator has a rated current of 30A, it successfully works where SH847 and SH775 are replaced. When it is properly mounted, it heats up a bit. The reason for this is that the energy components are oversized, the heatsink is larger and the regulator/rectifier only tolerates output current consumption. Up to 30A consumption current is enough for the vast majority of motorcycles. Our HVSP regulator/rectifier acts as a perfect combination of series and parallel(shunt) regulator/rectifier, which allows the regulator/rectifier to work well at all rpms and reduces unnecessary load on the stator. Thinner versions are more convenient to mount, and the thicker version has better cooling and is recommended for quads. Our HVSP regulator/rectifier as well as the SH847 have protection against overheating and excessive generator voltage (over 200VAC). However, our HVSP regulator/rectifier limits heating to only 80°C, not 100°C. A 20°C lower maximum temperature typically extends the life of electronic circuits by 4 times. In addition, our HVSP regulator/rectifier has protection against excessive voltage on the battery side, provided by the parallel(shunt) part of the regulator whose primary function is to unblock the series regulator at high engine speeds. Since the regulator/rectifier does not have a connector, this further reduces the cost. A direct connection can be more reliable than a connector, but it is less practical in case of repairs. Since the HVSP regulator/rectifier is extremely reliable, direct connection is not such a problem. In addition, the HVSP regulator/rectifier, like our other serial voltage regulators, has a built-in LED that facilitates diagnostics because it lights up when the regulator has not reached the set voltage, but also when there is a stator breakdown while the engine is not running (when the contact is + it is at 12V). The price of our regulator is from €136 to €146 with a 4 to 5 year warranty. Many of our customers choose our HVSP type of regulator as a safe choice for solving the problem of frequent stator and regulator/rectifier burnouts.

With the HVSP regulator you have the same benefits

   The series regulator/rectifier reduces the current consumption from the stator and thereby heats it up less, reduces the heating of the stator and the installation from the stator to the regulator/rectifier. Heating the installation is not harmless because it can lead to a partial or complete interruption of power from the generator, which will result in (imperceptible) discharge of the battery, damage to the battery and inability to start the motorcycle. In addition, due to the reduction of the motor load, the installation of a series regulator/rectifier is literally self-paying. If it reduces power consumption by only 150W, it pays for itself after about 1390 driving hours.

Long warranty on the HVSP regulator

   One of the most important things when deciding to buy our regulator/rectifier is extremely high reliability. We give an incredibly long warranty precisely because our regulators/rectifiers do not break down. Diodes and thyristors only work at less than 25% of their maximum capabilities at the maximum declared current of the regulator/rectifier, which is the reason why the regulator/rectifier can work with stronger stators as long as the average output DC current does not exceed 30A. The control electronics consumes micro amps, can withstand multiple higher voltages at the output to the battery without consequences and does not contain elements subject to accelerated aging at higher operating temperatures. Over decades of refinement, we have created a regulator/rectifier that survives both stator failure and poor installation problems without failure. Of course, we cannot guarantee this 100%, but practical results confirm it. Because of all this, the hybrid HVSP series-parallel regulator/rectifier is the best choice to replace the Shindengen SH847.

   More about the advantages of serial regulators can be found in the article: "Advantages of serial type voltage regulators on motorcycles". We offer high-quality serial single-phase and three-phase regulators (up to 8000rpm) and serial-parallel regulators for high-performance motorcycles that have proven themselves as an excellent choice in long-term practice. You can find more about the history of the series-parallel (shunt) regulator/rectifier in the article "History of the hybrid series-parallel (shunt) regulator/rectifier". More about the quality of regulators can be found in the article:  "Top-quality regulators".

   Motorcyclists often replace the stator and install a serial type regulator before a failure occurs, because the factory solution can end with stator burning on some motorcycles. And then the original regulator can also burn out. It's better to prevent failure than to be left stranded on the road without power.

Conclusion

• HVSP regulator replaces SH847
• HVSP regulator is cheaper
• HVSP regulator has a stable voltage
• The HVSP regulator rarely breaks down
• The HVSP regulator has a 4-year warranty