Electrical setup, options and answers, from scratch!

Neddy
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Re: Electrical setup, options and answers, from scratch!

Postby Neddy » Wed Aug 05, 2015 11:02 am

Run those lights from the House battery rather than the Starters.

Problem solved!

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NeilV
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Re: Electrical setup, options and answers, from scratch!

Postby NeilV » Mon Aug 17, 2015 9:51 am

Good as an idea, but so far I've been able to leave the mess that the main bus harness is totally alone, so I'll prabably just use them when I can either parallel the batteries, or charge directly from the solar.

Separate question: that "very cheap battery monitor" thread has me interested in getting one for my 24v system, esp as it purports to do upto 90v...

When sizing a shunt, w=va, so a 100a shunt for 24v should easily handle my 1200w 24v inverter right?
Last edited by Mark on Mon Aug 17, 2015 10:05 am, edited 1 time in total.
Reason: Redundant quote of immediately prior post.
8.5m 1990 Dennis Dart bus, 6L turbo -4 pax
- 24v system: 2x 104ah AGM, 20a PWM controller 500W solar; 1200w puresine inverter
120L grey/fresh water, 75L compressor fridge, gas Califont, Diesel MK85 heater [awaiting install]

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NeilV
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Re: Electrical setup, options and answers, from scratch!

Postby NeilV » Fri Oct 09, 2015 10:10 pm

So it seems the 500w solar is quite overkill at present (late sun, lowered light use, not yet onto installing the peripherals like satellite dish and TV... House Batteries are now floating at 27.7 (dbl the 13.7-13.9 recommended for 12v system??) and reach floating voltage by 10am. Loving the increased sunlight hours, but struggling to 'use' them :-T

Is 27.7 my ideal float for 24v (2x12) AGM's?
8.5m 1990 Dennis Dart bus, 6L turbo -4 pax
- 24v system: 2x 104ah AGM, 20a PWM controller 500W solar; 1200w puresine inverter
120L grey/fresh water, 75L compressor fridge, gas Califont, Diesel MK85 heater [awaiting install]

Neddy
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Re: Electrical setup, options and answers, from scratch!

Postby Neddy » Sat Oct 10, 2015 6:34 am

Most 24v AGM batteries have an ideal float voltage of 27.2v - 27.6v.
27.7 volts is quite acceptable, but you should check the manufacturers recommendations for your particular batteries.

Neville.

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scubadoo
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Re: Electrical setup, options and answers, from scratch!

Postby scubadoo » Sat Oct 10, 2015 7:53 am

NeilV wrote:So it seems the 500w solar is quite overkill at present...

No such thing Neil. ;)
There will be many future occasions when you wish you had much more.
Neville
Mitsi Fuso CI Ultimate 6.8m 3.9 T/D. 180l fresh/grey. Single 300Ah LiFePO4 for truck/house.
600W solar. Victron 50A MPPT. 6kW Webasto diesel water/air heater.
255l Samsung 230VAC digital inverter fridge/freezer.Gas cooking/oven.


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