diy solar

diy solar

Van Conversion Wiring Diagram, Please Review

Code: 
legend {
    {} { functional block }
    nnn|NNN| { fused busbar position where nnn is wire size in awg and NNN is the fuse rating in amps }
    nnn|UUU| { un-fused busbar position where nnn is wire size in awg }
    <-> { bi-directional current flow }
    -> { uni-directional current flow }
    <- { uni-directional current flow }
    dpst { double pole single through switch }
    @ { back reference }
}
dc_domain {
    busbars {
        positive {
            004|UUU|<->150A_breaker<->battery
            006|100|<-scc<-dpst<-panels(10awg)
            006|100|->battery_protect->fuse_block.feeders
        }
        negative {
            004|UUU|<->shunt<->battery
            006|UUU|->scc->dpst->panels(10awg)
            006|UUU|<-fuse_block.feeders
            004|UUU|<-future_inverter
        }
    }
    fuse_block {
        feeders {
            positive@
            negative<->|@
                       |<->chassis_bond(4 awg)
        }
        branches {
            positive {
                012|020|->fan
                012|020|->fridge
                012|020|->combo socket
                012|020|->combo socket
                016|001|->shunt_positive
            }
            negative {
                012|UUU|<-fan
                012|UUU|<-fridge
                012|UUU|<-combo_socket
                012|UUU|<-combo_socket
                016|UUU|<-battery_protect_ground
            }
        }
    }
}
 
smoothJoey said:
Code: 
legend {
    {} { functional block }
    nnn|NNN| { fused busbar position where nnn is wire size in awg and NNN is the fuse rating in amps }
    nnn|UUU| { un-fused busbar position where nnn is wire size in awg }
    <-> { bi-directional current flow }
    -> { uni-directional current flow }
    <- { uni-directional current flow }
    dpst { double pole single through switch }
    @ { back reference }
}
dc_domain {
    busbars {
        positive {
            004|UUU|<->150A_breaker<->battery
            006|100|<-scc<-dpst<-panels(10awg)
            006|100|->battery_protect->fuse_block.feeders
        }
        negative {
            004|UUU|<->shunt<->battery
            006|UUU|->scc->dpst->panels(10awg)
            006|UUU|<-fuse_block.feeders
            004|UUU|<-future_inverter
        }
    }
    fuse_block {
        feeders {
            positive@
            negative<->|@
                       |<->chassis_bond(4 awg)
        }
        branches {
            positive {
                012|020|->fan
                012|020|->fridge
                012|020|->combo socket
                012|020|->combo socket
                016|001|->shunt_positive
            }
            negative {
                012|UUU|<-fan
                012|UUU|<-fridge
                012|UUU|<-combo_socket
                012|UUU|<-combo_socket
                016|UUU|<-battery_protect_ground
            }
        }
    }
}
Click to expand...

Where's positive connection for future inverter? All I see is a negative connection to the neg bus.
 
Code: 
legend {
    {} { functional block }
    nnn|NNN| { fused busbar position where nnn is wire size in awg and NNN is the fuse rating in amps }
    nnn|UUU| { un-fused busbar position where nnn is wire size in awg }
    <-> { bi-directional current flow }
    -> { uni-directional current flow }
    <- { uni-directional current flow }
    dpst { double pole single through switch }
    @ { back reference }
}
dc_domain {
    busbars {
        positive {
            004|UUU|<->150A_breaker<->battery
            006|100|<-scc<-dpst<-panels(10awg)
            006|100|->battery_protect->fuse_block.feeders
            004|125|->future_inverter
        }
        negative {
            004|UUU|<->shunt<->battery
            006|UUU|->scc->dpst->panels(10awg)
            006|UUU|<-fuse_block.feeders
            004|UUU|<-future_inverter
        }
    }
    fuse_block {
        feeders {
            positive@
            negative<->|@
                       |<->chassis_bond(6 awg)
        }
        branches {
            positive {
                012|020|->fan
                012|020|->fridge
                012|020|->combo socket
                012|020|->combo socket
                016|001|->shunt_positive
            }
            negative {
                012|UUU|<-fan
                012|UUU|<-fridge
                012|UUU|<-combo_socket
                012|UUU|<-combo_socket
                016|UUU|<-battery_protect_ground
            }
        }
    }
}
 
smoothJoey said:
legend {
Click to expand...
Here's some things I suggest based on the latest legend:

The little black battery protect ground wire that comes with the battery protect should get wired to the negative bus bar, not the fuse box. It doesn't need to be fused.

The battery protect is basically a switch. It only goes on the positive wire between the positive bus bar and the fuse box. It is not connected to the fuse box negative in any way.

There should probably be a fuse between the battery protect out and the fuse box. Though it may not be needed if there is a fuse between the positive bus bar and the battery protect in.

The little red wire that comes with the shunt is supplied with an inline fuse. No need to run that wire to the fuse box. I'd run that wire directly to the battery positive terminal or the positive bus bar.
 
rmaddy said:
Here's some things I suggest based on the latest legend:

The little black battery protect ground wire that comes with the battery protect should get wired to the negative bus bar, not the fuse box. It doesn't need to be fused.
Click to expand...
Its not, its a negative.
rmaddy said:
The battery protect is basically a switch. It only goes on the positive wire between the positive bus bar and the fuse box. It is not connected to the fuse box negative in any way.
Click to expand...
Its inline with the fuse block feeder positive and its gets its ground from the fuse block.
rmaddy said:
There should probably be a fuse between the battery protect out and the fuse box.
Click to expand...
Why?
rmaddy said:
Though it may not be needed if there is a fuse between the positive bus bar and the battery protect in.
Click to expand...
There is.
rmaddy said:
The little red wire that comes with the shunt is supplied with an inline fuse. No need to run that wire to the fuse box. I'd run that wire directly to the battery positive terminal or the positive bus bar.
Click to expand...
It agree, it would have the benefit of not powering down the battery monitor when the battery protect disconnects the fuse block.
 
Last edited:
Code: 
legend {
    {} { functional block }
    nnn|NNN| { fused busbar position where nnn is wire size in awg and NNN is the fuse rating in amps }
    nnn|UUU| { un-fused busbar position where nnn is wire size in awg }
    <-> { bi-directional current flow }
    -> { uni-directional current flow }
    <- { uni-directional current flow }
    dpst { double pole single through switch }
    @ { back reference }
}
dc_domain {
    busbars {
        positive {
            004|UUU|<->150A_breaker<->battery
            006|100|<-scc<-dpst<-panels(10awg)
            006|100|->battery_protect->fuse_block.feeders
            004|125|->future_inverter
        }
        negative {
            004|UUU|<->shunt<->battery
            006|UUU|->scc->dpst->panels(10awg)
            006|UUU|<-fuse_block.feeders
            004|UUU|<-future_inverter
        }
    }
    fuse_block {
        feeders {
            positive@
            negative<->|@
                       |<->chassis_bond(6 awg)
        }
        branches {
            positive {
                012|020|->fan
                012|020|->fridge
                012|020|->combo socket
                012|020|->combo socket
                016|001|->shunt_positive(move this to the line side of main breaker)
            }
            negative {
                012|UUU|<-fan
                012|UUU|<-fridge
                012|UUU|<-combo_socket
                012|UUU|<-combo_socket
                016|UUU|<-battery_protect_ground
            }
        }
    }
}
 
Last edited:
smoothJoey said:
Its not, its a negative.
Click to expand...
You don't want the battery protect ground wire connected to something controlled by the battery protect. That's wire the battery protect ground wire should be attached to the negative bus bar. Maybe I'm just confused by your legend.

smoothJoey said:
Its inline with the fuse block feeder positive and its gets its ground from the fuse block.
Click to expand...
Again, the ground should be on the bus bar, not the fuse block.

smoothJoey said:
Why?
Click to expand...
To protect the wire between the battery protect and the fuse box. But again, I'm not sure it's actually needed.
 
rmaddy said:
You don't want the battery protect ground wire connected to something controlled by the battery protect.
Click to expand...
Its not.
Its the negative side of the fuse block.
rmaddy said:
That's wire the battery protect ground wire should be attached to the negative bus bar. Maybe I'm just confused by your legend.
Click to expand...
That likely what it is.
rmaddy said:
Again, the ground should be on the bus bar, not the fuse block.
Click to expand...
No its fine.
I've been running like that in my rig for a year.
Honestly.
rmaddy said:
To protect the wire between the battery protect and the fuse box. But again, I'm not sure it's actually needed.
Click to expand...
I don't think it is.
The power comes from the busbar and the wire is the same gauge on both sides of the battery protect.
The battery protect and the busbar positive feeder are part of the positive side of the circuit which is protected by the fuse at the busbar.
The fuse is sized for the weakest link which is the battery protect.
 
rmaddy said:
You don't want the battery protect ground wire connected to something controlled by the battery protect. That's wire the battery protect ground wire should be attached to the negative bus bar. Maybe I'm just confused by your legend.
Click to expand...

That was my initial reaction too. But it will work since the negative side of the fuse block connected directly to the bus bar. However, my preference would be to have it going on the bus bar.
 
smoothJoey said:
fuse_block { feeders { positive@ negative<->|@ |<->chassis_bond(6 awg)
Click to expand...
In my finalized legend from earlier we had the chassis ground coming off the negative bus bar. Should chassis ground be from the fuse block or the negative bus? Is your thought to save on another negative wired connection by just making chassis ground come from the fuse block?
smoothJoey said:
016|001|->shunt_positive(move this to the line side of main breaker)
Click to expand...
Move shunt positive to positive bus? No fuse because the shunt has inline fuse?
HRTKD said:
However, my preference would be to have it going on the bus bar.
Click to expand...
rmaddy said:
The little black battery protect ground wire that comes with the battery protect should get wired to the negative bus bar, not the fuse box.
Click to expand...
smoothJoey said:
No its fine.
I've been running like that in my rig for a year.
Honestly.
Click to expand...
2 votes BatteryProtect to negative bus. 1 vote BatteryProtect to negative side of the fuse block.
 
dudedogvan said:
1 vote BatteryProtect to negative side of the fuse block.
Click to expand...
If the battery protect ground wire is connected to the negative terminal of the fuse box (which is directly connected to the negative bus bar) then both choices are effectively the same. But to me it just seems cleaner to connect the BP ground wire directly to the bus bar. Let's say the fuse box goes bad and you need to remove it. That shouldn't affect the BP wiring at all. But that's me. Either works.
 
dudedogvan said:
In my finalized legend from earlier we had the chassis ground coming off the negative bus bar. Should chassis ground be from the fuse block or the negative bus? Is your thought to save on another negative wired connection by just making chassis ground come from the fuse block?
Click to expand...
The fused busbar studs are not long enough to stack 2 lugs.
The feeder studs on the fuse block are long enough so I suggest you bond to chassis there.
dudedogvan said:
Move shunt positive to positive bus?
Click to expand...
No
dudedogvan said:
No fuse because the shunt has inline fuse?
Click to expand...
connect the wire with the inline fuse to the line side of the master breaker.
That way it stays up and active when the rest of the system is isolated.
dudedogvan said:
2 votes BatteryProtect to negative bus. 1 vote BatteryProtect to negative side of the fuse block.
Click to expand...
If those 2 votes had anything more than aesthetics and/or feelings I might be convinced.
Remember I've been running this way for a year now.
Also I could not find 5/16"(8mm) ring terminals.
 
Last edited:
smoothJoey said:
If those 2 votes had anything more than aesthetics and/or feelings I might be convinced.
Remember I've been running this way for a year now.
Click to expand...
My battery protect ground wire goes directly to my negative bus bar. But it's only been running for 10 months. :)
 
smoothJoey said:
Better get the 12.
I don't see any lighting circuits.
Will you be cooking in the van at all?
Click to expand...
Thanks for looking out. Lighting will be very simple led fairy lights with a usb connection to one of the combo sockets. They also have a remote with dimmer. Cooking will also be simple with a coleman propane stove and a little 5lb propane tank. Simple sink with marine foot pump. Bathing in lakes, rivers, and my favorite, hot springs. I also have a Nemo Portable Shower that works quite well. I'll be fitting a shortened queen size memory foam mattress on the bed frame. I'll have the full 60" width of a queen, but I'll be cutting down the 80" length to about 72". I will be starting a mobile tie dying business and living in the van full time.
 
Actually it'll be more like living "out of" the van, which I like. While my design will be more comfortable than living in a tent, it's definitely not the deluxe sprinter van apartment.
 
Anyone object to removing the chassis bond?
Since we haven't used the grounding lug on the solar charge controller its a bit pointless.
 
Code: 
legend {
    // comment
    {} { functional block }
    nnn|NNN| { fused busbar position where nnn is wire size in awg and NNN is the fuse rating in amps }
    nnn|UUU| { un-fused busbar position where nnn is wire size in awg }
    <-> { bi-directional current flow }
    -> { uni-directional current flow }
    <- { uni-directional current flow }
    dpst { double pole single through switch }
    @ { back reference }
}
dc_domain { // 12 volt floating system
    busbars {
        positive {
                                      |->inline_fuse->shunt_positive
            004|UUU|<->150A_breaker<->|<->battery
            006|100|<-scc<-dpst<-panels(10awg)
            006|100|->battery_protect->fuse_block.feeders
            004|125|->future_inverter
        }
        negative {
            004|UUU|<->shunt<->battery
            006|UUU|->scc->dpst->panels(10awg)
            006|UUU|<-fuse_block.feeders
            004|UUU|<-future_inverter
        }
    }
    fuse_block {
        feeders {
            positive@
            negative@
        }
        branches {
            positive {
                012|020|->fan
                012|020|->fridge
                012|020|->combo socket
                012|020|->combo socket
            }
            negative {
                012|UUU|<-fan
                012|UUU|<-fridge
                012|UUU|<-combo_socket
                012|UUU|<-combo_socket
                016|UUU|<-battery_protect_ground
            }
        }
    }
}
 
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