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NS 2 with Ctek D250s Dual and Smartpass

PostPosted: Fri Nov 04, 2016 10:51 am
by Ktait
Hi, I have just purchased a Hunter 41 AC and have had the alternator (Hitachi 80 amp) converted to p type and installed the NS 2 regulator and 230 watts of solar panels. My preference is to integrate the system using the Ctek D250s dual and smartpass giving DC -DC charging with a separate solar input.
My Question is will the NS2 work with this configuration? Should the battery sensor from the NS2 be relocated to the starting battery?

Re: NS 2 with Ctek D250s Dual and Smartpass

PostPosted: Fri Nov 04, 2016 6:45 pm
by Coulomb
We predict alternator failure when the house battery is deeply discharged. You should check its temperature.

Keep the temp. sensor on the house battery.

You should not have a problem with the Ctek in the system.

Re: NS 2 with Ctek D250s Dual and Smartpass

PostPosted: Sat Nov 05, 2016 9:13 pm
by Ktait
Thanks for the quick reply.
Do you have any suggestions for a replacement alternator that will handle the load or a suitable temperature sensor for the alternator.
Should a temperature sensor relay on the alternator switch the field output of the NS2?

Re: NS 2 with Ctek D250s Dual and Smartpass

PostPosted: Mon Nov 07, 2016 12:46 pm
by Coulomb
The Ample Power alternator #4023-S is a hot rated alternator with the saddle mount to replace the Hitachi.

Sensing alternator temperature of the case is only part of the problem. The real issue is hot spots internal to the alternator which can't be sensed. Without a lot of engineering tests developing a curve of correlation between the hot spots, the case temperature, the load current, and load duration one can only make a wild guess and stick on a thermostat, and keep the fingers crossed.