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You are more likely to have a good manual for the dump load than I am, lol

(This is a pair of Midnite Solar Chinook wind turbines)

The manual I have is this one: https://www.midnitesolar.com/pdfs/10-331-1_REV_J_Chinook_200-MANUAL.pdf

At this point I'm well and truly stuck, and this seems to be one of those questions that either everyone knows the answer to, so no one writes it down, or it requires something arcane.

My current classic 150 settings are
EQ: 32.3 Absorb 29.6 Float 27.0
Absorb time is 2:00
EQ time is 1:00

So if we could tweak the dump load (they're MidNite Solar MNCDL300 's ) to measure higher than 29.6 at the battery bank that might work?
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Midnite DIY Series / Re: MN3024DIY
« Last post by dapdan on Today at 11:13:31 AM »
I can confirm that the fans on the DIY3024 are indeed variable speed.

3
General Discussion / Re: Voltage and Power From Panels Fluctuacting
« Last post by grgdgreek on Today at 10:57:59 AM »
I also just switched to dynamic "on" and
 seems to have stabilized.
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Midnite DIY Series / Re: MN3024DIY setup challenges
« Last post by dapdan on Today at 10:57:34 AM »
boB,

I am glad to hear about the 68V cap for the controllers and there are alot of people out there using second life Li ion that need 4.2V per cell for full charge.

The cells I am using come in a 4p8s module and they are LG and not from the Leaf.

If the newer MNDIY5048 can go up to 63V I would definitely be interested in it. I would like to know the maximum charging voltage for the on board charge tho. As I mentioned before the 3024 is rated up to 33V but the on board charger is only programmable up to 31.6V. If this is case for the 5048 then this will render the on board charger useless for anyone looking to use lithium batteries other than LifePo.

FNG,

Thanks for the link for the Wifi dongle for the DIY inverter series. I will definitely be looking at getting a couple.
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Midnite DIY Series / Re: MN3024DIY setup challenges
« Last post by FNG on Today at 07:10:47 AM »
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New Product Ideas and Discussion / Re: Monitoring App
« Last post by boB on August 16, 2022, 11:58:46 PM »

Really? Took me several evenings to make the LED blink on an Ardunio.

Mike

😅

it gets easier the more you practice those kinds of things.

Getting extremely hard to find people/techs that can do any of that stuff for some reason.

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The "Classic" charge controller / Re: What wakes up Classic to start charging ?
« Last post by boB on August 16, 2022, 11:55:39 PM »

Larry, is your PV input voltage typically like 1.0 or say 1.5 volts shy of making the Classic turn on ?

IF so, (I shouldn't say this really but in your case, the input voltage is so low it should not hurt anything), you might try going into TWEAKS and adjust the PV input offset to read 1 or 1.5 volts HIGH.

At much higher input voltages compared to the battery voltage, you wouldn't want to do that but in your situation, it should not hurt anything to at least try this.

boB

Bob ,

I put my PV back in 2 series reconfiguration and Tweaked up the PV voltage  to make it turn on. Seems to be working fine now. I think I had to go 3v higher in tweak offset but I don't see why that should hurt anything because once it turns on the charge , the charge voltage drops to the proper range. I will have to keep an eye on it since I just made that change . But the Classic certainly is running a lot cooler now and the fan doesn't need to run any or much .

Larry

Excellent !
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Larry, is your PV input voltage typically like 1.0 or say 1.5 volts shy of making the Classic turn on ?

IF so, (I shouldn't say this really but in your case, the input voltage is so low it should not hurt anything), you might try going into TWEAKS and adjust the PV input offset to read 1 or 1.5 volts HIGH.

At much higher input voltages compared to the battery voltage, you wouldn't want to do that but in your situation, it should not hurt anything to at least try this.

boB

Bob ,

I put my PV back in 2 series reconfiguration and Tweaked up the PV voltage  to make it turn on. Seems to be working fine now. I think I had to go 3v higher in tweak offset but I don't see why that should hurt anything because once it turns on the charge , the charge voltage drops to the proper range. I will have to keep an eye on it since I just made that change . But the Classic certainly is running a lot cooler now and the fan doesn't need to run any or much .

Larry 
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Midnite DIY Series / Re: MN3024DIY setup challenges
« Last post by boB on August 16, 2022, 11:29:46 PM »
Hi Dan

I don't know enough about that inverter.   I have a feeling that there isn't a way.   But I just don't know.
It is probably related to capacitor voltage ratings which normally stop at 63V DC.   I *think* that the newer versions of the 48V DIY inverter may actually go to 63V.

I thought that these Nissan Leaf batteries (if that is what you are using)  really need to go to an even higher voltage ?

FYI, MidNite is getting 68V capacitors for our new controllers just for this reason.

I am going to ping Ryan about this post.   

The DIY Combox is possibly what you are referring to ?  It lets the MNDIY inverters talk to the net.

It is very close.  Closer than the Classic Bluetooth dongle and phone app.

boB
10

Well, how to keep the dump loads from taking over during the day ?

What does the dump load controller or dump load switch consist of ?  Is there an online manual we could look at ?

Does the controller have an input that can disable it from turning the dump load on with a logic signal of some sort ?

It may be possible that the Classic, using one of its Aux outputs, can make the dump load controller dump at a higher voltage that would be more reasonable for the charging stage you are presently in.

A Solid State Relay  (SSR)  controlled by the Classic's Aux may make that possible by using the Waste-Not mode which goes active when the battery voltage gets just above the charge stage voltage.

If the dump load controller voltage can be adjusted higher, that setup might still be good for a fail-safe in case the Classic should reset or something while the wind is blowing a big one.

boB
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