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Old 05-04-2016, 11:18 AM   #337
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Thanks. I think I may put a DPDT switch in the helm station that allows me to toggle back and forth between a Series and Parallel setup. I will report back on my findings.

-evan
If you put a DPDT switch in the helm, you'll need to bring your solar panel wiring directly to the switch which might be difficult. However, if you use a DPDT relay near the panels like drboyd did, you can use a SPDT switch at the helm and avoid running heavy gauge wire everywhere.
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Old 05-04-2016, 11:24 AM   #338
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My trailer has (2) 100 Watt panels, with a heavy duty DPDT relay in the connector box. The default (no coil power) position is parallel, but applying +12V to the coil through a remote cable switches the panels to a series configuration.

In camp sites with shade spots, I go for the parallel; with full sun all day, I use series.

Of course it's overkill, but I'm a serious geek.

So there!

That's a great idea. Thanks.

I may try to emulate that as I suspect there would be situations that would favour either Parallel or Series.

-evan
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Old 05-04-2016, 11:30 AM   #339
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If you put a DPDT switch in the helm, you'll need to bring your solar panel wiring directly to the switch which might be difficult. However, if you use a DPDT relay near the panels like drboyd did, you can use a SPDT switch at the helm and avoid running heavy gauge wire everywhere.
Yes. You're right.

A more elegant solution comes to mind:

I may just run all four of the Standard 10 AWG cables to the engine room with and install a Relay DPDT switch there just before the MPPT Controller with a Parallel / Series switch at the helm.

Thanks.

-evan
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Old 05-04-2016, 01:19 PM   #340
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uh huh



I didn't say that. I just said their claims are grandiose at best. Right in line with what Lew said.



If there are dozens of publications saying that, please post some links for all of us. It would be news to me. And I'd like to correct my position.

I regularly see appreciable 'solar boost' with solar arrays 200 watts+. I measure the amperage coming into the solar controller and then directly to the batteries. Always an amperage increase except for extremely low light situations like morning/ evening very lie sun angles.

I'm with Bold on this one. 'Angry' and Ralph can continue to espouse the virtues of dated, simple modulating technology while most other folks use MPPT to gat the most from their panels.

And wait 'till we get the Victron solar controllers fully integrated. They have the fastest MPPT sampling times in the industry to produce even more 'boost'.


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Old 05-04-2016, 02:46 PM   #341
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I may just run all four of the Standard 10 AWG cables to the engine room with and install a Relay DPDT switch there just before the MPPT Controller with a Parallel / Series switch at the helm.
And you will only need a SPST switch at the helm. I look forward to seeing your results.
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