Battery

[AranM0n3y88]

Does ts-rm-2 show u how many amps in ur battery current right now ?

exp.. Battery voltage graph show full volumes
. Battery current grap shows only 5 lever of volumes.


I never seen it goes full like the voltage ..

2nd ? Am thinking of buying 2more 100watts plane so I should have 8 [800watt] thinking of putting 4 48volt and other set 4 48 volt can my morningstar (60)handle it

I test 400watts as 48 volt it give me around 22amps n 80 volt ... but I have around 30feet away from my battery system n it show 22 amps n 60 volt..

I have 4 6volt Trojan =450

n thx u for ur time n hopefully u unsderstand me..

[Mike90250]

The morningstar meter panel only shows battery voltage. It cannot show, or be programed for battery capacity or remaining amp hours

If you are loosing 20volts, between array (80V) and in 30 feet you only read 60V, your wire is very undersized, and are loosing 440Watts in the wire. (20V x 22A = 440watts)
or you are reading some meter wrong, because you are loosing nearly all your PV wattage in small wire. 22A needs at least 10ga wire, 8 ga for 30' would be better.

[AranM0n3y88]

Ok thxz

so if u saying 20x22=440watts
which mean I can't put 800 watt. (2set of 48volt )

20x44=880 watts. Is that right ? If so how can i connecte 800 watts in series or pallaler. Want to use all I can get from a plane ...

my wire is 12ga.

I want to make sure I charge my battery full want it to last a long time 4-8 years


right now I have only 600watts. (100each) should I buy 2more?
sum1 told me 2 buy 2more to make 2 set of 48volt. N I should see around 600watts n 45amps sumthing around there. Is he right ?

keep in mind my 60amp 12=800watts
. 24=2600 watts
. 48=3200watts

am running 12volt system. Our power is 220volt keep that in mind

P.s.. thanks mike

[Mike90250]

You need to get a volt meter and use it to measure the battery voltage:
a) Morning before sun hits the panels
b) Noon
c) 3pm
d) 7pm

After 2 days of measurements, you should be able to see if the battery is returning to it's full voltage @ 3pm - if not you need to reduce loads, or increase solar array. Read the voltage specs for your battery, as to what is Full Charge voltage. and half charged voltage.

[AranM0n3y88]

k I will go buy 1 2morrow n see the result as u say!!!

Ok let just say I need more panel is 800watts isnt it 2much for mppt since max is 150volt on it...

if I add 80 on 1 side (4panel) n 80 on other side isn't it 160volt ?

or I should get 7 panel 1set in 4 n other in 3 should give me around 140 volt will that work..

ps.. thxz for ur time n info

[Mike90250]

Don't buy anything yet.

Take the measurements, we need to see what is happening. The numbers you gave are not believable, loosing 20V in 30feet is so wrong, there is something else amiss, your measurement or something..

[AranM0n3y88]

Am going to buy a measurement 1st...

Right now am testing only 4 panels in 48 volt
I test it from the panels it give me 80 volt n 22 amps but wen I connect them to my mppt I only get 300watts n 22amps. I lose 20volt.

my friend told me 2 connect 2 set of 48volt (4on the left 4 in the right) I should get 80volt only n 44amps around there if i buy 2more 100watts panels


is he right ???


n my ? Was if i have 2 set of 48volt shouldn't my volt be 160 volt? 80 on 2 side n 80 on the other side ? Or the volt stay the same but the amps goes up !!!!

[Mike90250]

Please tell us what your panels are ie:
100w
31Voc
27Vmp
3 isc
2.6 Imp

Then we can advise how to best hook them up for the most efficiency for your MPPT controller

[AranM0n3y88]

3 panels
pmax =100 watts
imp=5.7a
vmp=17.5v
voc=22.5v
isa=6.46a

othe3 is
pmax=100watts
Imp=a
vmp=18.4v
voc=22.4v
isa=6.01a

that's wat I have now 6 panels 100 each

[Mike90250]

3 panels

othe3 is

Imp=a

(would be close to 5.4A)

Ya got a typo there, but from what I gather, All the panels could be wired in parallel, or series. They are fairly close. I would wire in series strings, to obtain a voltage that is at least 2x the battery voltage, if you have a 24V battery, you would wire 4 panels in series, giving you about 80Voc. If that is within limits of the controller.

[AranM0n3y88]

Am using 12v system

so u tell me I could add 2 more panels 100watts each so I could have 2 set of 4

n connect them in series would give me 80or160 volt
?

that's my ? Since the begin. If i connect 2set of 4 connect them in series.
what would my volt be ?


told at 12p.m my volt was around 65volt n 23apms n is sunny with cold air [not2hot] 4 panels only 48volt (1set)

at 3pm volt was 70.5volt n 180 watts n 12.7 amps [4 panels only][48volt]

[Mike90250]

Depending on the limits of your charge controller, the simplest way to charge 12V batteries with all 6 or 8 of the panels , would be to wire
3 or 4 panels in series (best to use all the same panels in series) and then wire the 2 sets of panels in parallel. This would give you about
80V @ 10amps. When a MPPT controller gets done with regulating it, you would be charging 12V battery with about 55Amps.
MPPT controllers do their magic by converting high voltage, low amps, to low voltage, high amps.

[AranM0n3y88]

Ok so i should wire 4 panels series 48volt that should give me around 80volt...

den wire the other 2 panels in pallaler that will give me around 20volt n 12amps right

n connect all of them 2gether
should give me 100volt n 55amps as u say

does that wat u mean ? N can that work?

[SunEagle]

Ok so i should wire 4 panels series 48volt that should give me around 80volt...

den wire the other 2 panels in pallaler that will give me around 20volt n 12amps right

n connect all of them 2gether
should give me 100volt n 55amps as u say

does that wat u mean ? N can that work?

Parallel strings should always be as similar as possible. Do not use unbalanced sets.

If you only have 6 panels then wire 3 in series (gets you about 60v) and do the same with the second set of 3. Then wire both sets in parallel. That will get you a 60v system rated at 2 times the amps of the Imp on a panel.

[AranM0n3y88]

I just change my wiring I have 4panels in series that would give me 80volt

n the other 2 panels wire them in Parallel ( there r similar in everything)

n connect them all to the wiring that goes down2my mppt

I did wat mike said hopefully for a better result

the best way to wire them n have the best result (volt n amps) ?

n I have 3panles the same n 3 other the same. Only lil diffs