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    Continuity on Inverter

    Agreed, I was going to ground it but I guess I don't even have the option now. Will do. Thanks for highlighting to make sure I'm thinking about it. I can just plug into the outlets in the front for AC and run no other ground anywhere at any point, it's all going out the inverter, through my...
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    bonding case grounding lug to negative current carrying lug.

    I had the same question and in fact on my inverter apparently they are all connected anyway. I have a Renogy 1000w inverter and I get continuity between the ground lug, the negative terminal and the AC neutral and ground (which are internally bonded). So on mine that ground lug doesn't need a...
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    Continuity on Inverter

    I just got off the phone with Renogy. They said the connections and continuity than I'm seeing are normal. That it's all connected somewhere in the device. Does anyone else see this with other brands? They also said that because of this continuity, if my negative DC terminal is running to a...
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    Continuity on Inverter

    Interesting. I'm not sure what to take away from that or if I should still be worried. I get continuity from AC neutral (which is internally bonded to ground) to the Negative DC terminal. I get continuity from the Grounding lug to the Negative DC terminal as well. It seems like everything is...
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    Continuity on Inverter

    I thought so as well. Renogy 1000w Inverter. https://www.renogy.com/1000w-12v-pure-sine-wave-inverter/
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    Continuity on Inverter

    Without any cables on the inverter at all I used a multi-meter to test continuity at different points on the inverter. The neutral and ground for the AC side are bonded, so I do get continuity there which makes sense to me. However, on the DC side if I touch the negative DC cable connection...
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    Wire Sizing?

    Thank you
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    Wire Sizing?

    That's all very reasonable. I just want to make sure I'm going large enough to be safe as well. For this it seems like I should be able to sleep at night with 1/0 wire on batteries and to the bus bars.
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    Wire Sizing?

    The 1000w inverter came with 4awg wire out of the box. Do you have a chart or resource I could learn to reference to know if I need to switch out that 4awg for the 2awg that you suggest? Wonderfully helpful thank you. Sounds like I'd be safe to go with 1/0 wire for this system. It confuses...
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    Wire Sizing?

    I suppose that was part of my question and was curious if I could just size based on max draw or if I needed to size based on max discharge current. 1000w inverter is what I'm using and would be the largest load I have on the system. I also have a DC fuse box which can technically handle 100a...
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    Wire Sizing?

    It would not be, that would be the very max the battery BMS would even allow or that the batteries are rated for. Really I'd be pulling at max 150a because that's the largest breaker I have, anything beyond that and any line coming off the battery would be tripped. So for continuous current...
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    Wire Sizing?

    I've tried to answer this myself but there are so many tables out there it's hard to know, so I was looking for some direction. I have 2x 12v 100ah batteries in parallel. Individually they can deliver 100amps, so in parallel I'm looking to size wire for 200 amps. Everything running from the...
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    Wiring diagram check

    Thank you for all of that, super helpful. I'll make some changes to the line-up. Thanks!
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    Wiring diagram check

    So if each branch will have it's own fuse at 30amps or less within the box, and if the max aggregate current is 100amps shouldn't I size the fuse for the block as a whole accordingly? I'm not trying to beef up a specific branch with a large fuse, but trying to protect the box from the aggregate...
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    Wiring diagram check

    Thank you for catching that. This is what the specs say: Max Amps: 100A per block, 30A per circuit. https://smile.amazon.com/gp/product/B001P6FTHC/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1 I was thinking that if I had say, three of the circuits each pulling 30a then I might get 90a or...
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    Wiring diagram check

    Do I need a fuse here? I was under the impression that my 2s2p setup can't exceed the wire capacity or what the MPPT should be able to handle. I'll be switching to a dual pole breaker, but the amps are so high it wouldn't provide any current protection, just disconnect...
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    Solar Disconnect Options

    My current setup is a 2s2p configuration with 4x100w 12v panels so 24v (48.6 Voc) running at just over 10a isc. I have no fuses with the configuration and the disconnects would be just for disconnecting, not over charge protection. I've been told by some that 2 pole disconnects are the way to...
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    4x100w panels in parallel - to fuse or not to fuse

    Do you have a suggestion of a disconnect I should be installing in this system? When I've searched for them I continue to get ones rated for 48v and are seemingly for battery disconnects. Alternatively, I can just stick to parallel and stay in the 12v range (24.3voc) and most of these switches...
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    4x100w panels in parallel - to fuse or not to fuse

    Something like this is what I had planned to use: https://smile.amazon.com/dp/B000MMC914?psc=1&ref=ppx_yo2ov_dt_b_product_details In 2s2p I'd be at 48.6Voc, and this switch is only rated for 48v max, so I'd need something with a higher rating, but conceptually it's just the way to disconnect...
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    4x100w panels in parallel - to fuse or not to fuse

    By disconnects do you just mean a switch or a fuse that lets me isolate the PV from the MPPT connection/system if needed? In my head I was thinking of the scenario where the positive and negative wires both have a short touching the van. If I touch the metal van then I'd be in the circuit...
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    Wiring diagram check

    I appreciate all the help this forum has given me thus far. I think I have an understanding of what I'd like to do. Could you please look over this wiring diagram and see if anything looks off to you? I'm using 2awg cables for a lot of the heavier load connections which I realize may depend...
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    Is 12v 4p setup more 'safe' than a 2s2p setup at 24v?

    Thank you for the opinion. That seems to be the consensus, that yes it's more dangerous but it's still <50v and in the 'low voltage' category so just be careful and enjoy the efficiency of 2s2p. I've done everything I can on the wiring in the van to make sure if there's a short a fuse would...
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    Is 12v 4p setup more 'safe' than a 2s2p setup at 24v?

    Running 4x12v (24.3voc) panels in parallel keeps voltage at 24.3 Voc while if I run 2s2p I'm at 48.6Voc. I understand the efficiencies gained of running the 2s2p configuration but I'm getting those at the cost of upping the voltage of the system. Does this make it inherently less safe should...
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    4x100w panels in parallel - to fuse or not to fuse

    I had read this which explained it to me: https://www.explorist.life/how-to-fuse-a-solar-panel-array-and-why-you-may-not-need-to/
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    4x100w panels in parallel - to fuse or not to fuse

    Thank you for taking the time to check that out and I agree the MPPT can handle it. Perhaps I'm mis-guided but when I hear about how there's different concerns for safety at 50v DC then I thought stepping up to a 2s2p system which produced higher voltage would increase risk on the solar side of...
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    4x100w panels in parallel - to fuse or not to fuse

    Ok, thank you. Helpful perspective. They included a 10a fuse, I'll go with 3 more of those and call it good. Keeps me below the max series fuse rating but over the possible 5+ amps the panels could ever generate in proper working order while in 4p. Thank you.
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    4x100w panels in parallel - to fuse or not to fuse

    Simple is good. Would you simply order some inline fuses for each panel then? They provide one 10a, so I'd need three more. Would you use a 10a fuse like they provided which is > than the short current at 5.21a or 15a fuse (the max series fuse rating)?
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    4x100w panels in parallel - to fuse or not to fuse

    Sounds like you are in the fuse each panel camp since I'd be above 15amps. Instead of rocks I'll order a box of fuses and we can throw them as subtle hints until they update their website. :| With the short-circuit current at 5.21 amps, would you fuse with the 10a inline connecter like they...
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    4x100w panels in parallel - to fuse or not to fuse

    Ha, not sounding like a jerk at all - just confirming the facts that I wasn't hoping to hear. The fact that their own website specifically says it's not required to have a fuse for parallel on this kit is what's throwing me off, but I hear what you're saying. If I go 2s2p then it works for...
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    4x100w panels in parallel - to fuse or not to fuse

    I have the Renogy 400w solar kit. The panels have: 15a max series fuse rating Short Circuit Current (ISC) 5.21a If I run the 4 panels in parallel I'd be up to 20.84a (5.21x4). If one of the panels shorts and the other three panels decide to take the path into that panel they would only be...
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    Chassis Grounding in DC only system

    This all makes a lot of sense to me. Thank you again for the time helping me understand a bit better.
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    Chassis Grounding in DC only system

    I spent some more time thinking about this part. What I think you are saying here is that if the positive wire connects to the steel frame of the van and makes a connection with the chassis ground, the idea is that it's likely to blow the fuse on that line and shut down the power. So in theory...
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    Chassis Grounding in DC only system

    I appreciate your help so please forgive me as I'm trying to learn....if something is touching a metal part of the vehicle and creates a partial ground, does that mean I'm already creating a chassis ground, albeit unintentionally? or are you referring to the positive side likely touching some...
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    Chassis Grounding in DC only system

    This was sorta my line of thinking...if I connect a chassis ground then any time I'm touching the vehicle and there's an accidental positive connection, now I'm in the circuit, right? Where if there is no chassis ground I'm just touching positive only and there is no issue there. It seemed...
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    Chassis Grounding in DC only system

    I think I get what you're saying. So if I have a 40a fuse in place and I somehow become inside the circuit due to a shorted wire touching the chassis/body of the vehicle then it would cause the fuse to blow and prevent shock. Maybe I'm missing something but in an isolated DC system it seems...
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