Solar and Electrical Diagram feedback please, Thanks - Page 3 - Ford Transit USA Forum
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post #21 of 56 (permalink) Old 04-14-2019, 08:52:PM
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Originally Posted by orton View Post
If I understand the DC to DC charger correctly, the charger converts vehicle 12 volt power to AC and then converts that power to DC and outputs the proper DC charge profile for the house battery design. If that is wrong I would like to be corrected by someone more knowledgeable. That happens in one box.

The vehicle powered inverter and shore power charger combination functions the same but in two boxes. The advantage that I see in the two box design is you have access to the 120 volt AC power for uses other than just charging.
Conceptually similar but slightly different. It is alternating, but in a different way.

My understanding of DC - DC converters is that the incoming power is used to temporarily charge up a coil / inductor. This power in this coil is then discharged at a voltage close to the new desired voltage and filtered. This happens pretty fast - as in multi kHz kinds of rates.

Through the magic of electrical engineering, (incoming volts) x (incoming amps) = (outgoing volts) x (outgoing amps) - some losses.

Turning this into a "charger" adds a few more complexities.

Some experience with auxiliary power
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post #22 of 56 (permalink) Old 04-15-2019, 12:42:AM Thread Starter
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Originally Posted by orton View Post
If I understand the DC to DC charger correctly, the charger converts vehicle 12 volt power to AC and then converts that power to DC and outputs the proper DC charge profile for the house battery design. If that is wrong I would like to be corrected by someone more knowledgeable. That happens in one box.

The vehicle powered inverter and shore power charger combination functions the same but in two boxes. The advantage that I see in the two box design is you have access to the 120 volt AC power for uses other than just charging.
Very interesting. Thanks for the info . Hmmm

2018 Ford Transit 350 EcoBoost HR Extended
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post #23 of 56 (permalink) Old 04-15-2019, 09:59:AM
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A gentle suggestion is that you need to get a little more educated if you want to make the right decisions and have a design that will work for your needs and be safe.

Your power needs appear to be small so the design shouldn't need to be complicated. And if you will have access to add and modify later, you cld just start out with a basic system. But to even know what a basic system is and what can be skipped takes some knowledge. Which you can gain by reading threads and going to utube university.

There are a bunch of threads on here with elec designs u can review and steal from. What dave above said regarding figuring out your actual power needs is a great place to start. His build site has an excellent explanation and example of how to do that.
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post #24 of 56 (permalink) Old 04-15-2019, 10:53:AM
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Thanks for the reply and info on the monitor. I'm looking into the components and if they play well with the batteries I already have now.

This is what makes this stuff so confusing. so many variables.
FYI: BB sells bundles not unlike what you are considering. They appear willing to help out their customers, I've heard good things about their CS.

https://battlebornbatteries.com/prod...?orderby=price

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post #25 of 56 (permalink) Old 04-16-2019, 01:41:PM
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Thanks for sharing and showing your work, YogaMan. I feel like I can never learn enough and am planning a very similar electrical system. I noticed that you have the panels in series vs. parallel. Series would give you 24v/5amps, while parallel would yield 12v/10amps. Seems like parallel would suit you best, was that intentional?
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post #26 of 56 (permalink) Old 04-16-2019, 07:41:PM
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Originally Posted by VanGoMKE View Post
Thanks for sharing and showing your work, YogaMan. I feel like I can never learn enough and am planning a very similar electrical system. I noticed that you have the panels in series vs. parallel. Series would give you 24v/5amps, while parallel would yield 12v/10amps. Seems like parallel would suit you best, was that intentional?
@ YogaMan
I have my 4 panels wired in parallel.

There are tradeoffs with either series or parallel.
Parallel will make you less susceptible to major power loss from partial shading, because one panel in shade won't kill the output from the others.
Series will allow you to use thinner gauge cabling without too much power loss.


A good MPPT controller will work well with the lower voltage parallel setup. You may be able to use a cheaper MPPT with the series paneling.



I found it desirable to use heavier gauge cable, a good MPPT, and have the better partial shade tolerance.

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post #27 of 56 (permalink) Old 04-16-2019, 10:47:PM
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Why not just use a fast-trip circuit breaker for 110VAC loads to prevent over-current?
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post #28 of 56 (permalink) Old 04-16-2019, 11:06:PM
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Why not just use a fast-trip circuit breaker for 110VAC loads to prevent over-current?
There is a circuit breaker built into the FSW-Inverter/Charger/MPPT/Shore device I use. (SunGoldPower AnyPower)

Keeping track of the load in order to avoid tripping the breaker is still a good idea.

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post #29 of 56 (permalink) Old 04-16-2019, 11:11:PM
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Originally Posted by Mitch View Post
Why not just use a fast-trip circuit breaker for 110VAC loads to prevent over-current?
There is a circuit breaker built into the FSW-Inverter/Charger/MPPT/Shore device I use. (SunGoldPower AnyPower)

Keeping track of the load in order to avoid tripping the breaker is still a good idea.

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post #30 of 56 (permalink) Old 04-17-2019, 10:56:AM
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Originally Posted by VanGoMKE View Post
Thanks for sharing and showing your work, YogaMan. I feel like I can never learn enough and am planning a very similar electrical system. I noticed that you have the panels in series vs. parallel. Series would give you 24v/5amps, while parallel would yield 12v/10amps. Seems like parallel would suit you best, was that intentional?
You certainly can, but it takes about a year and some experiments to really sink in for most people.

The alternative is to find a local marine or rv electrician and go have fun faster. By the time you have purchased all of the learning cure item and end up with the final system, it is often about the same price as well.

Some experience with auxiliary power
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