PWM or MPPT.

[threedogs]

Sorry TD you got it from Jaycar , must learn to read more gooder.

You read much betterer now lol
Now its stays 12v ,do I now double the AH input like 3.4 ah x 2 , that being 60 watts and 60 watts
should give me 6.8 yes/no

[threedogs]

Looking at getting a solar panel and have seen there are two types of regulators.
Don't need to explain the nitty gritty but which one is better.

From what I've read the MPPT regulates by a switch and pwm is by electrical pulse.

Means nothing to me. So which one??

What are your plans for this , will it be portable,perfect up the Murray etc
or fixed which could cause problems chasing the sun if an awning is erected.
more than welcome to pop in and check out my setup, its going all the time
in the backyard running an 18 ah battery

[Cuppa]

@Cuppa I was just reading the stats on a 120 watt folding panel.
It states one 60 watt panel will return approx 3.40 AH, question is
being 2 x 60 panels does that mean I return 6.80ah approx or is it
only 3.40 still.
when hooking two panels together is it pos to pos and neg to neg
what happens if you go pos to neg, having a brain fade sorry lol

GQtdauto answered it. Same as with batteries. + to + is in parallel & will give you around 6.8A (not Ah) @ 12v in good conditions. + to - is in series & will give you 3.4A @ 24v.

screenshot_948.jpg

[GQtdauto]

Setup on mine TD is camper 200 watt panel is fixed but on hinges I've made , can move them thru about 180 degrees if needed , on the GQ the 100 watt can be moved from flat to 90 degrees so straight up and down if needed .
Just waiting for paint to dry and glue to set and get off my arse and should have a pic or two tomorrow on what I've done .

[Cuppa]

Jay see, if you want a low cost solar reg, capable of handling up to around 170w of solar I doubt you would do better than this one at the price.

http://www.ebay.com.au/itm/VICTRON-B...26.m2548.l4275

Note that it comes with a 5 year warranty ..... which says a lot about it’s quality.

It’s a reg which is well thought of from a well known company with a great attitude. I know a number of folk experimenting with low cost computerised lithium battery management who have found these to be good & reliable regs.

It also has the ability to connect a battery temperature probe, allowing for temperature compensated charging, which I rate highly in regard to looking after batteries well.

In terms of quality the difference between this & the Chinese cheapies like the CMPT02 is chalk & cheese...... no comparison.

[jay see]

Wow, glad I didn't ask for a detailed answer.

Thanks all.
Have some reading to do. I'm sure that this may help others as well.

[threedogs]

@GQtdauto @jaysee, Im in two minds over fixed panels on the roof, to be able to get the best efficiency
out of a panel you really need to be chasing the sun.
autotd is half way there with being able to "angle" the panel towards the sun, but will still need to move the patrol
over the course of a day.
I didnt like fixed panels to start off with as you needed to park in full sun to benefit from them,
but being in full sun also meant what you're running is out in the heat as well,,,,,,but,,,,,,,,found having the 80watt
panel on my other camper it served as a tropical roof similar to what Land Rover use ,,and actually kept
interior temps down.
I flat panel on its own would only be good for a short period of time, and at a certain time of year.
Winter with the low sun would be hard to get a panel working at 100% in full sun,
said my peace,, any thoughts??????
A free standing panel that can be moved has my vote over fixed panels

[GQtdauto]

This is the basic idea TD , panel adjusts anywhere from flat to about 90 degrees .
Problems with photos just now send them later.

[GQtdauto]

Photos of adjustable panel .
IMG_7343.JPGIMG_7344.JPGIMG_7345.JPGIMG_7346.JPG

[jay see]

Jay see, if you want a low cost solar reg, capable of handling up to around 170w of solar I doubt you would do better than this one at the price.

http://www.ebay.com.au/itm/VICTRON-B...26.m2548.l4275

Note that it comes with a 5 year warranty ..... which says a lot about it’s quality.

It’s a reg which is well thought of from a well known company with a great attitude. I know a number of folk experimenting with low cost computerised lithium battery management who have found these to be good & reliable regs.

It also has the ability to connect a battery temperature probe, allowing for temperature compensated charging, which I rate highly in regard to looking after batteries well.

In terms of quality the difference between this & the Chinese cheapies like the CMPT02 is chalk & cheese...... no comparison.

Cupp that link of the reg. Are you saying to get a folding panel type and replace the reg with this one???

If so I recall someone saying to go for a larger panel in watts. Will the one that I posted the link to earlier work. I would like to use it as is this coming weekend and then change the reg after we return.
It's a 200 watt panel..