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Open Roads Forum  >  Tech Issues

 > battery to inverter wiring

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BFL13

Victoria, BC

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Joined: 02/15/2006

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Posted: 06/17/22 05:22pm Link  |  Quote  |  Print  |  Notify Moderator

11.8v shut off is ridiculous. Most straight inverters alarm at 11v but keep running until 10.5v shut off. You have an inverter/charger which might have settings so perhaps you can change that as suggested above.

If you have a 1v voltage drop with MW on, now you need 12.8 battery voltage to get anything. How when a full battery is 12.7?

EG I have a 1v drop with MW on, but my inverter alarms at 11v so I can run it when battery is below 50% SOC at 12.1v. Your wiring is fatter than mine and we both have four 6s.

Edit: do you have some other thing in the circuit that shuts off at 11.8? Not sure how they work, but some monitors like Victron have a way to do that?

* This post was edited 06/17/22 06:08pm by BFL13 *


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pianotuna

Regina, SK, Canada

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Posted: 06/18/22 01:15am Link  |  Quote  |  Print  |  Notify Moderator

What make and model is the inverter?

Change the wiring to balanced.


Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

MNRon

Tennessee

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Posted: 06/18/22 03:25pm Link  |  Quote  |  Print  |  Notify Moderator

Drawing large loads like 150A will have IR drop in the cabling as you’re aware, but internal resistance in the batteries will also come in to play at high loads like that. If you switch to Li you’ll not only gain an advantage of lower internal resistance, but also higher starting voltage (at an obvious cost $$)


Ron & Pat
2022 F350 Lariat CCSB SRW Diesel
2019 VanLeigh Vilano 320 GK

wa8yxm

Davison Michigan (East of Flint)

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Posted: 06/18/22 03:52pm Link  |  Quote  |  Print  |  Notify Moderator

Like someone else said I'd amp up the cables between pairs.

Also clean all connections.

Alas I had same issues.


Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times


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