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BurtSner

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Reply with quote  #1 
With my setup of 1x100w and 1x120w solar panels I’ve got just a basic controller that sits under the seat and gives no info about what’s going on apart from a simple light, on fro charged, off if not.

I’ve heard about MPPT charge controllers in the past and most of what was said went clean over my head, I believe they maximise the power according to conditions, but I don’t know what it all means

My question is, should I consider getting one to provide better control for my leisure batteries? If so, which sort? Cheap is not an option, it has to be the correct one for the job. Buy cheap, buy twice.






A late edit : I am charging a bank of 4 x 110ah Banner batteries.

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coppo

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Reply with quote  #2 
Yes they are a good buy and give quite a more power in low light and low temperatures especially.

Votronic mppt controllers have an excellent reputation although not used one myself, a lot of motorhomers use them and I have never heard a bad report.

This one would suit you Simon for your set up. Photonic universe.

High efficiency 250W 12V Dual Battery MPPT solar charge controller / regulator for up to 50V solar input

High efficiency 250W 12V Dual Battery MPPT solar charge controller / regulator for up to 50V solar input
High efficiency 250W 12V Dual Battery MPPT solar charge controller / regulator for up to 50V solar input

Phone order?

Call our FREE phone
0203 150 1111
and quote the product code below
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Working hours Mon-Fri 9am-6pm
Product code:
MPP250
 
Ex. VAT £99.99
Inc. VAT £119.99
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SANDBAGSID

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Reply with quote  #3 
Most of the solar panel users seem to say the mppt ones are the best
but not cheap. Then as Simon says cheap isn't best.

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Gaffa22

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Reply with quote  #4 
Good question Simon been thinking the same
I have a 100W solar panel and a standard Voltronic charge controller. It does seem to just manage to keep both batteries charged up.

But I heard the MPPT were far more efficient in cold cloudy weather.

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Pudsey Bear

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Reply with quote  #5 
You have to be careful of phoney PWM units with a different case logo, how can us peeps tell, which is why I stick with a known source.
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Kev [comp] 

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powerplus

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Reply with quote  #6 
hi all

i am sure that genuine mppt controllers are very good especially if you are in low sun areas as they will make the most of available sun

i originally had 1,    100w panel with 1, battery with a pwm controller but when i changed to 2 batteries i found that the 1 panel struggled
the option i had was a true mppt controller or an additional 100w solar panel 

as i all ready had some mounting brackets i opted for the panel with a cheap pwm controller

after speaking to sargent electrical who make my control panel which the original panel went through and charged both the hab and engine battery it was suggested that the additional panel and controller went directly to the hab batteries 


this seems to be working well down here on the algarve

yes i am on hookup but i leave the charger switched off the batteries can more than cope with the 12v lighting, pump radio
and a bit of tv

i would a suggest that £100+ spent on a extra panel would give more power than a good controller especially if you have multiple batteries

1 thought is i just had is you have 2 different size panels and i am assuming they go  through 1 controller
 

barry

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coppo

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Reply with quote  #7 
So Simon, have you made a decision yet on this then?
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SANDBAGSID

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Reply with quote  #8 
I is gonna just wait and see how the all new electric moho
does its charging then nick the idea.[big-thumbs-up-smiley-emoticon]

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BurtSner

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Reply with quote  #9 
@Barry & Paul - no decisions yet I’m still all of a muddle.

Firstly I only have room on the roof for the 2 panels I already have.
Secondly, they are both wired into the one controller
I’ve had no problems with them in the couple years or so they have been together.
The sole issue occurred recently when I opened up the batteries just before I went off to Scotshire a few weeks ago, topped up the badly treated cells with loads of distilled water. And subsequently I am a bit concerned a bout doing the right thing from now on.

I believe my Ring inverter that I use to quickly tell me the battery voltage, I can flick the switch on from inside the front door without entering the hab area, is actually showing less than the true value. This I’ve now satisfied myself by double checking using the hab area voltmeter, a portable plugin meter and also my digi meter direct across the terminals. I’ve got a wire in digital meter enroute to me that I can place inside the door for a quick view.

Now, knowing that the available sunlight at this time of year is relatively low, perhaps I should get something to more adequately arrest what’s available. Therefore I’m posing my question asking what should I get, or perhaps not bother at all as at this time of year we’re not going off wilding at all and so it’s not too much of a worry.

Confused.com couldnt help 😂



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coppo

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Reply with quote  #10 
Quote:
Originally Posted by SANDBAGSID
I is gonna just wait and see how the all new electric moho
does its charging then nick the idea.[big-thumbs-up-smiley-emoticon]



It will be a few years before us peasants get to step inside one of those Alan, my feet will come to a standstill and refuse to move forward when I see the price tag on the windscreen[biggrin]
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BurtSner

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Reply with quote  #11 
There won’t be a price tag , if you need to know the price you won’t be able to afford it. Simples
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Burstner Nexxo T660 - family fun
1999 Suzuki Hayabusa
2000 Honda Blackbird
Molly - Chocolate Labrador 
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Exeter, East Devon

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powerplus

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Reply with quote  #12 
hi burstner

if you dont need to change the controller dont bother

but i would keep an eye on the batteries lots of people have banner  batteries in the site here in the algarve and they really use up the water

mine are the varta vfd that are supposed to be good but who knows as they are sealed

regarding the e/mhome

1 thing that would concern me is finding a site that  will supply  hookup to charge the battery overnight for the next days trip it would not surprise me if the roof does not have 1kw of solar panels

and i think 6a or even 10a  mains hook up would not work for the vans

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roadrunner

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Reply with quote  #13 
I have never been on a site,are they not for wobbly boxes and tents[scratching-head-smiley-emoticon]
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roadrunner

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Reply with quote  #14 
Quote:
Originally Posted by SANDBAGSID
Most of the solar panel users seem to say the mppt ones are the best
but not cheap. Then as Simon says cheap isn't best.


So are these cr-p. mpp a.png  mppt b.png 


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Pudsey Bear

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Reply with quote  #15 
Quote:
Originally Posted by powerplus
hi all

i am sure that genuine mppt controllers are very good especially if you are in low sun areas as they will make the most of available sun

i originally had 1,    100w panel with 1, battery with a pwm controller but when i changed to 2 batteries i found that the 1 panel struggled
the option i had was a true mppt controller or an additional 100w solar panel 

as i all ready had some mounting brackets i opted for the panel with a cheap pwm controller

after speaking to sargent electrical who make my control panel which the original panel went through and charged both the hab and engine battery it was suggested that the additional panel and controller went directly to the hab batteries 


this seems to be working well down here on the algarve

yes i am on hookup but i leave the charger switched off the batteries can more than cope with the 12v lighting, pump radio
and a bit of tv

i would a suggest that £100+ spent on a extra panel would give more power than a good controller especially if you have multiple batteries

1 thought is i just had is you have 2 different size panels and i am assuming they go  through 1 controller
 

barry



Spot on Barry, more solar is always going to be better, but MPPT is sometimes the only option if you don't have the roof space for more, and of course even with more solar power the MPPT will drag more out of it too.

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Kev [comp] 

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If you're not the lead dog, your view never changes.

Don't force it, use a bigger hammer. Semper ubi, Sub ubi. 

Link to self build pictures 


http://tinyurl.com/nzyry9n

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tugboat

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Reply with quote  #16 
I've been looking for that MPPT controller that many of us have had these last few years and been pleased with, thinking to recommend it to Simon.

Can't find them on ebay, and I can't even find a picture on Google images. Strange.

They have possibly been discontinued and there may be better ones now, but I'd have thought there would be a record somewhere.

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SANDBAGSID

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Reply with quote  #17 
I cant comment as to whether those controllers are any good or not
as I don't know anything about them, Not having solar panels I have never
gone into the ins and outs of what is or isn't good sorry roadrunner cant be
helpful on an answer for you. 

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BurtSner

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Reply with quote  #18 
Quote:
Originally Posted by witzend
Simon do you keep your panels hitched up all the time your at home I wondered if this could do any harm and asked here Over Solar I now disconnect mine and only switch them back occasionally


As I seldom put the MH onto hookup at home these days, then the panels are always connected to the batteries.

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Pudsey Bear

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Reply with quote  #19 
Mine is running on Solar right now, I'll nip out in a bit and take a pic of the SOC panel.
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Kev [comp] 

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If you're not the lead dog, your view never changes.

Don't force it, use a bigger hammer. Semper ubi, Sub ubi. 

Link to self build pictures 


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BurtSner

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Reply with quote  #20 
You show me yours and I’ll show you mine.

Btw, showing 13.7v about an hour ago.

Attached Images
jpeg 9CE2F4C3-37BA-44EC-AB87-87D728DD48EC.jpeg (384.92 KB, 5 views)


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Burstner Nexxo T660 - family fun
1999 Suzuki Hayabusa
2000 Honda Blackbird
Molly - Chocolate Labrador 
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Pudsey Bear

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Reply with quote  #21 
Put it away Mannell [strong-no-smiley-emoticon][strong-no-smiley-emoticon]
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Kev [comp] 

Warning, might contain an opinion [nono]  

If you're not the lead dog, your view never changes.

Don't force it, use a bigger hammer. Semper ubi, Sub ubi. 

Link to self build pictures 


http://tinyurl.com/nzyry9n

2002 Bessacarr E745 Ducato
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BurtSner

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Reply with quote  #22 
Quote:
Originally Posted by witzend

Any relation to Trevor ?


Probably my nicest cousin. (But don’t tell him that 😉)

Actually, it seems the whole of Cornwall knows him. What’s your story?

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Burstner Nexxo T660 - family fun
1999 Suzuki Hayabusa
2000 Honda Blackbird
Molly - Chocolate Labrador 
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Exeter, East Devon

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powerplus

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Reply with quote  #23 
hi all

please do correct me if i am wrong, which has been known

i sort of remember when i was doing my solar panels that i read some were that  that mppt controllers work better with the higher input voltage that a pair of panels connected in series would give 

would this be right


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Pudsey Bear

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Reply with quote  #24 
Not sure if it would make any difference at all Barry, looks like a googling job.
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Kev [comp] 

Warning, might contain an opinion [nono]  

If you're not the lead dog, your view never changes.

Don't force it, use a bigger hammer. Semper ubi, Sub ubi. 

Link to self build pictures 


http://tinyurl.com/nzyry9n

2002 Bessacarr E745 Ducato
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BurtSner

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Reply with quote  #25 
Well I received it yesterday and fitted it all in a half hour or so. Very straightforward as it was a simple job of shopping over connections. I’d love to say there was a noticeable difference but sadly it’s been very dark and overcast all day.

Attached Images
jpeg 6F2D62EC-CA83-4FC5-9C86-0AF72555893E.jpeg (508.90 KB, 6 views)
jpeg EBCC8E2A-D843-4CCB-9033-0D1341C371D3.jpeg (278.21 KB, 6 views)


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Burstner Nexxo T660 - family fun
1999 Suzuki Hayabusa
2000 Honda Blackbird
Molly - Chocolate Labrador 
only a biker understands why a dog hangs its head out of the window
Exeter, East Devon

Simon

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