I have a Hawk's bay controller and the E-panel on it's way. Looking through the documents, I didn't see where the whizbang JR would fit into the E-panel.
Does it go inside the E-panel?
The Whizbang mounts on the shunt. So where ever that is located in the epanel would be the spot.
I made a video of mounting the Whizbang on my shunt for the Hawkes Bay though it was not in an epanel.
Also I stacked two whizbangs ( one was for Classic) though you would only put on one.
https://youtu.be/7t7lw8ryIxA
Larry
Quote from: qrper on May 25, 2026, 05:59:52 PMI have a Hawk's bay controller and the E-panel on it's way. Looking through the documents, I didn't see where the whizbang JR would fit into the E-panel.
Does it go inside the E-panel?
Hi. I think I read that you own a Rosie. If you have the Epanal for the Rosie, I believe a Whizbang Jr comes pre-installed on the shunt. (Your Solar equipment 'list' below your signature does not list any Midnite equipment). If you don't have an Epanal for the Rosie, as Classic Crazy stated, the Whizbang JR mounts to the side of a shunt, assuming you have one in your system.
Dave
Quote from: aaapilot on May 26, 2026, 01:17:41 PMQuote from: qrper on May 25, 2026, 05:59:52 PMI have a Hawk's bay controller and the E-panel on it's way. Looking through the documents, I didn't see where the whizbang JR would fit into the E-panel.
Does it go inside the E-panel?
Hi. I think I read that you own a Rosie. If you have the Epanal for the Rosie, I believe a Whizbang Jr comes pre-installed on the shunt. (Your Solar equipment 'list' below your signature does not list any Midnite equipment). If you don't have an Epanal for the Rosie, as Classic Crazy stated, the Whizbang JR mounts to the side of a shunt, assuming you have one in your system.
Dave
Dave...
I do have a rosie, and a classic 150. The rosie has the e-panel, too.
Both have whizbang jr installed.
The WBJR in the rosie e-panel doesn't do much 'cause it's not the the charging loop from the classic. If I used the ac charger in rosie, then the WBJR reports SOC/ charging current and so on. Just not for solar charging. That's done by the WBJR in the classic's homebrew e-panel.
I don't know how I can use the WBJR in rosie, to work with the Hawk's bay.
I haven't gotten it all planned out yet, but I'm thinking of running #2 gauge wire from HWB to the 0000 cables inside the e-panel of the rosie. They (the pos and neg) run to the battery bank. Then connect negative HWB though WBJR, and then of course positive from HWB to the positive post in the e-panel of rosie.
Basically, I'd be using the Rosie E-panel as a tie in point for the HWB, using the large 0000 cables to run current to the batteries.
I won't be able to do much for a while, as I'm going to upgrade the PV so I can have 500ish V going in. Right now, I have my system at about 90V, way, way, too low for the HWB.
The plan is to upgrade the pv panels to 6.4Kw, using the HWB, and let the Classic hum along with some of the left over panels at 90V and 2kw or so.
So, if I were to use the WBJR inside the e-panel for rosie, do I need to move the purple wire from rosie and route it to the HWB? Can I splice the purple wire and have it feed both the Roise and HWB?
Do I need to purchase another WBJR for the HWB?
mike
Apparently, there is no location for a WBJR inside the Epanel for the hawk's bay
Have you looked at this document? It may give you some insight.
https://www.midnitesolar.com/pdfs/10-562-1_Rev_D_(MNE300ROSIE-240P_Manual)_27SEP2023.pdf
Quote from: UpNorthMan on May 26, 2026, 05:30:07 PMHave you looked at this document? It may give you some insight.
https://www.midnitesolar.com/pdfs/10-562-1_Rev_D_(MNE300ROSIE-240P_Manual)_27SEP2023.pdf
Yes, I have. Thanks for the note
really the best thing would be to take one of your shunts and mount it in another box of some kind so you can install it directly to the battery and in between everything else. Then the Whizbang can see your whole system .
That is really the only way to have it work to your advantage.
Larry
Quote from: ClassicCrazy on May 26, 2026, 08:04:37 PMreally the best thing would be to take one of your shunts and mount it in another box of some kind so you can install it directly to the battery and in between everything else. Then the Whizbang can see your whole system .
That is really the only way to have it work to your advantage.
Larry
Is there a limit on how far you can run that purple wire from the shunt to a hawks bay?
Mike
Quote from: qrper on May 26, 2026, 10:26:58 PMQuote from: ClassicCrazy on May 26, 2026, 08:04:37 PMreally the best thing would be to take one of your shunts and mount it in another box of some kind so you can install it directly to the battery and in between everything else. Then the Whizbang can see your whole system .
That is really the only way to have it work to your advantage.
Larry
Is there a limit on how far you can run that purple wire from the shunt to a hawks bay?
Mike
The question has been asked in the past - here is one answer from boB
https://midniteftp.com/forum/index.php?topic=1818.msg16424#msg16424
Quote from: qrper on May 26, 2026, 02:33:50 PMDave...
I do have a rosie, and a classic 150. The rosie has the e-panel, too.
Both have whizbang jr installed.
The WBJR in the rosie e-panel doesn't do much 'cause it's not the the charging loop from the classic. If I used the ac charger in rosie, then the WBJR reports SOC/ charging current and so on. Just not for solar charging. That's done by the WBJR in the classic's homebrew e-panel.
I don't know how I can use the WBJR in rosie, to work with the Hawk's bay.
I haven't gotten it all planned out yet, but I'm thinking of running #2 gauge wire from HWB to the 0000 cables inside the e-panel of the rosie. They (the pos and neg) run to the battery bank. Then connect negative HWB though WBJR, and then of course positive from HWB to the positive post in the e-panel of rosie.
Basically, I'd be using the Rosie E-panel as a tie in point for the HWB, using the large 0000 cables to run current to the batteries.
I won't be able to do much for a while, as I'm going to upgrade the PV so I can have 500ish V going in. Right now, I have my system at about 90V, way, way, too low for the HWB.
The plan is to upgrade the pv panels to 6.4Kw, using the HWB, and let the Classic hum along with some of the left over panels at 90V and 2kw or so.
So, if I were to use the WBJR inside the e-panel for rosie, do I need to move the purple wire from rosie and route it to the HWB? Can I splice the purple wire and have it feed both the Roise and HWB?
Do I need to purchase another WBJR for the HWB?
mike
Apparently, there is no location for a WBJR inside the Epanel for the hawk's bay
I have the same set up w/a HB and Rosie. Just cable the battery output +/- from the HB to the battery lugs on the Rosie E-Panel. The same lugs you connect directly to your battery. In doing so, the Whizbang JR in the Rosie will capture the power from the HB and report in the SOC. (boB was the one who solved this same dilemma for me a couple years back with this simple solution!)
Good luck with your system :)
Dave
Quote from: ClassicCrazy on May 26, 2026, 10:54:03 PMQuote from: qrper on May 26, 2026, 10:26:58 PMQuote from: ClassicCrazy on May 26, 2026, 08:04:37 PMreally the best thing would be to take one of your shunts and mount it in another box of some kind so you can install it directly to the battery and in between everything else. Then the Whizbang can see your whole system .
That is really the only way to have it work to your advantage.
Larry
Is there a limit on how far you can run that purple wire from the shunt to a hawks bay?
Mike
The question has been asked in the past - here is one answer from boB
https://midniteftp.com/forum/index.php?topic=1818.msg16424#msg16424
thanks, Larry,
The search engine on this forum leaves a lot to be desired.
mike
Quote from: aaapilot on May 27, 2026, 10:58:50 AMQuote from: qrper on May 26, 2026, 02:33:50 PMDave...
I do have a rosie, and a classic 150. The rosie has the e-panel, too.
Both have whizbang jr installed.
The WBJR in the rosie e-panel doesn't do much 'cause it's not the the charging loop from the classic. If I used the ac charger in rosie, then the WBJR reports SOC/ charging current and so on. Just not for solar charging. That's done by the WBJR in the classic's homebrew e-panel.
I don't know how I can use the WBJR in rosie, to work with the Hawk's bay.
I haven't gotten it all planned out yet, but I'm thinking of running #2 gauge wire from HWB to the 0000 cables inside the e-panel of the rosie. They (the pos and neg) run to the battery bank. Then connect negative HWB though WBJR, and then of course positive from HWB to the positive post in the e-panel of rosie.
Basically, I'd be using the Rosie E-panel as a tie in point for the HWB, using the large 0000 cables to run current to the batteries.
I won't be able to do much for a while, as I'm going to upgrade the PV so I can have 500ish V going in. Right now, I have my system at about 90V, way, way, too low for the HWB.
The plan is to upgrade the pv panels to 6.4Kw, using the HWB, and let the Classic hum along with some of the left over panels at 90V and 2kw or so.
So, if I were to use the WBJR inside the e-panel for rosie, do I need to move the purple wire from rosie and route it to the HWB? Can I splice the purple wire and have it feed both the Roise and HWB?
Do I need to purchase another WBJR for the HWB?
mike
Apparently, there is no location for a WBJR inside the Epanel for the hawk's bay
I have the same set up w/a HB and Rosie. Just cable the battery output +/- from the HB to the battery lugs on the Rosie E-Panel. The same lugs you connect directly to your battery. In doing so, the Whizbang JR in the Rosie will capture the power from the HB and report in the SOC. (boB was the one who solved this same dilemma for me a couple years back with this simple solution!)
Good luck with your system :)
Dave
thanks, Dave,
I might be a bit dense here, but I opened the Epanel on rosie, and to get to the business end of the WBJR, it looks like I'd have to really dig into the wires. The battery end of the shunt is connected to the battery, which is of course correct, however, to get to the 'load' side of the shunt, I can't see how I'd land a #2 gauge wire there. If I connect the HB negative battery to the batter side of the WBJR, it wouldn't see any current flow from the HB.
I'm going to leave the WBJR in the homebrew epanel that the classic feeds.
And it looks like I'm going to take larry's advice and order in a third WBJR, put
it in a box, and let the HB read current flow going out to the battery. I can save some money by landing the #2 gauge wire inside the rosie epanel.
mike
Quote from: qrper on May 27, 2026, 05:28:31 PMQuote from: aaapilot on May 27, 2026, 10:58:50 AMQuote from: qrper on May 26, 2026, 02:33:50 PMDave...
I do have a rosie, and a classic 150. The rosie has the e-panel, too.
Both have whizbang jr installed.
The WBJR in the rosie e-panel doesn't do much 'cause it's not the the charging loop from the classic. If I used the ac charger in rosie, then the WBJR reports SOC/ charging current and so on. Just not for solar charging. That's done by the WBJR in the classic's homebrew e-panel.
I don't know how I can use the WBJR in rosie, to work with the Hawk's bay.
I haven't gotten it all planned out yet, but I'm thinking of running #2 gauge wire from HWB to the 0000 cables inside the e-panel of the rosie. They (the pos and neg) run to the battery bank. Then connect negative HWB though WBJR, and then of course positive from HWB to the positive post in the e-panel of rosie.
Basically, I'd be using the Rosie E-panel as a tie in point for the HWB, using the large 0000 cables to run current to the batteries.
I won't be able to do much for a while, as I'm going to upgrade the PV so I can have 500ish V going in. Right now, I have my system at about 90V, way, way, too low for the HWB.
The plan is to upgrade the pv panels to 6.4Kw, using the HWB, and let the Classic hum along with some of the left over panels at 90V and 2kw or so.
So, if I were to use the WBJR inside the e-panel for rosie, do I need to move the purple wire from rosie and route it to the HWB? Can I splice the purple wire and have it feed both the Roise and HWB?
Do I need to purchase another WBJR for the HWB?
mike
Apparently, there is no location for a WBJR inside the Epanel for the hawk's bay
I have the same set up w/a HB and Rosie. Just cable the battery output +/- from the HB to the battery lugs on the Rosie E-Panel. The same lugs you connect directly to your battery. In doing so, the Whizbang JR in the Rosie will capture the power from the HB and report in the SOC. (boB was the one who solved this same dilemma for me a couple years back with this simple solution!)
Good luck with your system :)
Dave
thanks, Dave,
I might be a bit dense here, but I opened the Epanel on rosie, and to get to the business end of the WBJR, it looks like I'd have to really dig into the wires. The battery end of the shunt is connected to the battery, which is of course correct, however, to get to the 'load' side of the shunt, I can't see how I'd land a #2 gauge wire there. If I connect the HB negative battery to the batter side of the WBJR, it wouldn't see any current flow from the HB.
I'm going to leave the WBJR in the homebrew epanel that the classic feeds.
And it looks like I'm going to take larry's advice and order in a third WBJR, put
it in a box, and let the HB read current flow going out to the battery. I can save some money by landing the #2 gauge wire inside the rosie epanel.
mike
Consider getting a Victron Smart shunt - they are very accurate and easier to integrate into monitoring program like Home Assistant if you ever want to do that . Otherwise why not just bolt the cables from a shunt together in one of your existing boxes and remove the shunt from there to use external ? Yeah probably more work than just getting a new one !
Larry
Quote from: ClassicCrazy on May 27, 2026, 06:23:38 PMQuote from: qrper on May 27, 2026, 05:28:31 PMQuote from: aaapilot on May 27, 2026, 10:58:50 AMQuote from: qrper on May 26, 2026, 02:33:50 PMDave...
I do have a rosie, and a classic 150. The rosie has the e-panel, too.
Both have whizbang jr installed.
The WBJR in the rosie e-panel doesn't do much 'cause it's not the the charging loop from the classic. If I used the ac charger in rosie, then the WBJR reports SOC/ charging current and so on. Just not for solar charging. That's done by the WBJR in the classic's homebrew e-panel.
I don't know how I can use the WBJR in rosie, to work with the Hawk's bay.
I haven't gotten it all planned out yet, but I'm thinking of running #2 gauge wire from HWB to the 0000 cables inside the e-panel of the rosie. They (the pos and neg) run to the battery bank. Then connect negative HWB though WBJR, and then of course positive from HWB to the positive post in the e-panel of rosie.
Basically, I'd be using the Rosie E-panel as a tie in point for the HWB, using the large 0000 cables to run current to the batteries.
I won't be able to do much for a while, as I'm going to upgrade the PV so I can have 500ish V going in. Right now, I have my system at about 90V, way, way, too low for the HWB.
The plan is to upgrade the pv panels to 6.4Kw, using the HWB, and let the Classic hum along with some of the left over panels at 90V and 2kw or so.
So, if I were to use the WBJR inside the e-panel for rosie, do I need to move the purple wire from rosie and route it to the HWB? Can I splice the purple wire and have it feed both the Roise and HWB?
Do I need to purchase another WBJR for the HWB?
mike
Apparently, there is no location for a WBJR inside the Epanel for the hawk's bay
I have the same set up w/a HB and Rosie. Just cable the battery output +/- from the HB to the battery lugs on the Rosie E-Panel. The same lugs you connect directly to your battery. In doing so, the Whizbang JR in the Rosie will capture the power from the HB and report in the SOC. (boB was the one who solved this same dilemma for me a couple years back with this simple solution!)
Good luck with your system :)
Dave
thanks, Dave,
I might be a bit dense here, but I opened the Epanel on rosie, and to get to the business end of the WBJR, it looks like I'd have to really dig into the wires. The battery end of the shunt is connected to the battery, which is of course correct, however, to get to the 'load' side of the shunt, I can't see how I'd land a #2 gauge wire there. If I connect the HB negative battery to the batter side of the WBJR, it wouldn't see any current flow from the HB.
I'm going to leave the WBJR in the homebrew epanel that the classic feeds.
And it looks like I'm going to take larry's advice and order in a third WBJR, put
it in a box, and let the HB read current flow going out to the battery. I can save some money by landing the #2 gauge wire inside the rosie epanel.
mike
Consider getting a Victron Smart shunt - they are very accurate and easier to integrate into monitoring program like Home Assistant if you ever want to do that . Otherwise why not just bolt the cables from a shunt together in one of your existing boxes and remove the shunt from there to use external ? Yeah probably more work than just getting a new one !
Larry
I have a victron smart shunt hooked up now, but it won't talk to the local app and neither rosie or HB know it's there. I need a WBJR to let the HB know what the state of charge is when I get my new rack batteries wired up.
I'm kicking around some ideas in my head. With the price of copper, I'm thinking of trying to use the cables that feed rosie.
mike
Looking at the manual that I linked earlier, it appears that there are wires already installed for the pv that go to the shunt. See item #14.
Or aren't these prewired?
Quote from: qrper on May 27, 2026, 08:41:55 PMI have a victron smart shunt hooked up now, but it won't talk to the local app and neither rosie or HB know it's there. I need a WBJR to let the HB know what the state of charge is when I get my new rack batteries wired up.
I'm kicking around some ideas in my head. With the price of copper, I'm thinking of trying to use the cables that feed rosie.
mike
The smart shunt can calculate the state of charge. Are you talking about doing closed loop and letting the battery bms tell the Hawkes Bay when to charge and stop charging the battery ? Let me know how that works out. I gave up on closed loop awhile back and just use open loop charging which works fine.
Larry
Quote from: UpNorthMan on May 27, 2026, 08:57:16 PMLooking at the manual that I linked earlier, it appears that there are wires already installed for the pv that go to the shunt. See item #14.
Or aren't these prewired?
Yes, to a point. The wiring shown is optional for installing a Classic controller to the Roise. That's not factory wired. The drawing shows the WBJR inside the rosie. However!! IF you follow the black wire from the classic negative it lands on the top stud of the WBJR. That's the problem. You can't get to it. The 300A breaker is right above it, and I don't know how much dissassembly would be required to access that lug. Do I have to remove the 300A breaker?
Remember, too, that the wire coming from the HWB is #2 gauge. The wiring shown in the diagram is for the classic.
Mike
Quote from: ClassicCrazy on May 27, 2026, 09:02:08 PMQuote from: qrper on May 27, 2026, 08:41:55 PMI have a victron smart shunt hooked up now, but it won't talk to the local app and neither rosie or HB know it's there. I need a WBJR to let the HB know what the state of charge is when I get my new rack batteries wired up.
I'm kicking around some ideas in my head. With the price of copper, I'm thinking of trying to use the cables that feed rosie.
mike
The smart shunt can calculate the state of charge. Are you talking about doing closed loop and letting the battery bms tell the Hawkes Bay when to charge and stop charging the battery ? Let me know how that works out. I gave up on closed loop awhile back and just use open loop charging which works fine.
Larry
I'm going to give it a shot. Letting the HB and the batteries talk to each other.
Way back when I was an installer, this was so much simple. FOur wires, total. Two in for PV, two out for batteries. Lead-acid didn't care closed or open loop. There wasn't any like a CAN bus, and if you wanted to monitor current, you tossed in a shunt, either high or low side, it didn't matter.
mike
Have you ever had one of those ah ha moments? I had one today.
Apparently I was looking for the trees in the forest.
The epanel for rosie had two terminal blocks marked battery - and battery +
I was under the impression that those were to be installed by the user when installing the Classic on the side.
I was wrong!!
With a bright flashlight, it does indeed, appear that the neg battery terminal does in fact go the correct stud on the WBJR. And the battery terminal goes to pos battery. So, it looks like I can run the output of the HB to those terminal blocks inside the rosie epanel. I hope they take #2 gauge wire!
now if I do that, I'm of the understanding that the WBJR in the rosie Epanel will talk to the HB?
mike
Quote from: qrper on May 28, 2026, 02:26:29 PMHave you ever had one of those ah ha moments? I had one today.
Apparently I was looking for the trees in the forest.
The epanel for rosie had two terminal blocks marked battery - and battery +
I was under the impression that those were to be installed by the user when installing the Classic on the side.
I was wrong!!
With a bright flashlight, it does indeed, appear that the neg battery terminal does in fact go the correct stud on the WBJR. And the battery terminal goes to pos battery. So, it looks like I can run the output of the HB to those terminal blocks inside the rosie epanel. I hope they take #2 gauge wire!
now if I do that, I'm of the understanding that the WBJR in the rosie Epanel will talk to the HB?
mike
Yes sir, that will work correctly, as I described yesterday. I'm using #2 cables from my HB as well and the lugs in the Rosie E-panel will accommodate both the battery cables and this cabling from the HB. Your Whizbang JR will see all the power coming from the HB :).
Dave
Quote from: aaapilot on May 28, 2026, 06:40:10 PMQuote from: qrper on May 28, 2026, 02:26:29 PMHave you ever had one of those ah ha moments? I had one today.
Apparently I was looking for the trees in the forest.
The epanel for rosie had two terminal blocks marked battery - and battery +
I was under the impression that those were to be installed by the user when installing the Classic on the side.
I was wrong!!
With a bright flashlight, it does indeed, appear that the neg battery terminal does in fact go the correct stud on the WBJR. And the battery terminal goes to pos battery. So, it looks like I can run the output of the HB to those terminal blocks inside the rosie epanel. I hope they take #2 gauge wire!
now if I do that, I'm of the understanding that the WBJR in the rosie Epanel will talk to the HB?
mike
Yes sir, that will work correctly, as I described yesterday. I'm using #2 cables from my HB as well and the lugs in the Rosie E-panel will accommodate both the battery cables and this cabling from the HB. Your Whizbang JR will see all the power coming from the HB :).
Dave
Yeah, over thought ,it. Was confused about the wiring shown for the classic. I wasn't sure it was factory installed thus the confusion. I'm going to order in some 2 gauge wire and start wiring in the hawks bay
Mike