idsolar:


buy flashbar or sealant. climb up and seal every nail punch (on top nail) any openings u can see. then enter ceiling, seal every see through opening and nail clearances. na careful work o

Thanks for replying. What's flashbar and what type of sealant works best?

microgiant:
Hello GeorgeD long time. I am trying to go into a kind of mini solar.

@dishtech

I got the PWM CC 12V/24V 60A. see pictures attached. My questions are

1. How do I connect the wires (a) parallel to the PWM CC, or (b) series? Note: batteries are LiFePo4.
2. Can I use a 1500VA MGE UPS?

First how many battery do you have?
Secondly what is your inverter voltage?
You can use the ups which I think is 24volt but must attached fan internally on the MOSFETs and should not exceed 600watt load on it because most ups you see are over rated and are designed to handle load within a short period.

Dishtech:


First how many battery do you have?
Secondly what is your inverter voltage?
You can use the ups which I think is 24volt but must attached fan internally on the MOSFETs and should not exceed 600watt load on it because most ups you see are over rated and are designed to handle load within a short period.

I mentioned 4 earlier and asked if it can be connected in series/parallel. You confirmed it can be done, which I believe is for the discharge line to make it 24V for use with a 24V inverter/UPS.

You also confirmed it can be charged with solar using a PWM CC which is why I purchased it (PWM CC). My question now is since the battery has separate charge and discharge cables, how do i connect the two batteries to the PWM CC? Note: I intend to connect in series for 24V output.

I also mentioned that one is a used battery which you also advised against using it, otherwise my initial intention was to parallel and series 2S2P.

Thanks for you support.

microgiant:
Hello GeorgeD long time. I am trying to go into a kind of mini solar.

@dishtech

I got the PWM CC 12V/24V 60A. see pictures attached. My questions are

1. How do I connect the wires (a) parallel to the PWM CC, or (b) series? Note: batteries are LiFePo4.
2. Can I use a 1500VA MGE UPS?

brother,
long time indeed. it's been a while.
so talking about this setup of yours, is there any particular reason you're choosing to go this route of used battery and
new battery combo? also the pwm option seems rather strange especially for a lifepo4 charging regimen.
personally i believe anything worth doing at all is worth doing well. i would rather advise a serious rethink on your part
and possibly (if it's not too late) plan to purchase new batteries of similar specs and a proper mppt cc that will give you
rest of mind.

Trippledots:

Very true. The small apc ups i use has a 60% efficiency rate. My load on it is very light anyway so i can manage with it. At the back of my mind tho i know im wasting scarce energy.

The 1500VA APC I have in storage here has an efficiency comparable to most inverters I've tried. It's however an online UPS (belonging to the line-interactive series), whatever that's supposed to mean (it syncs its output frequency to that of the input, so long as it's within acceptable limits and in a way, runs as a continuous inverter - which is fine for off-grid installations). It's a 24V unit and has a tare consumption of roughly 25W (measured with a clamp meter and a WizBang Jr.)

Edit:

Check this link.
Read this too for understanding delta conversion online UPS

The low efficiency referred to is a function of the continuous supply of the load by the inverter even when there's grid power (it first converts to DC then back to AC, protecting from surges, brownouts and whatever distortions/disruptions there might be). The inverter itself is very efficient. The online function can be disabled via the management software and it functions in mere passthrough mode.

It handles surge current draw devices just fine and can power either of my freezers or a freezer, not more than one at a time thought there's a trick to making it power two of them.

microgiant:


I mentioned 4 earlier and asked if it can be connected in series/parallel. You confirmed it can be done, which I believe is for the discharge line to make it 24V for use with a 24V inverter/UPS.

You also confirmed it can be charged with solar using a PWM CC which is why I purchased it (PWM CC). My question now is since the battery has separate charge and discharge cables, how do i connect the two batteries to the PWM CC? Note: I intend to connect in series for 24V output.

I also mentioned that one is a used battery which you also advised against using it, otherwise my initial intention was to parallel and series 2S2P.

Thanks for you support.

As I mentioned earlier, either use two from the new ones to get 24volt or buy another one new one to make 2s2p, or confirm that both batteries have the same voltage level by charging them to full capacity and leave them for 24hr or more if the new is the same with the new then you are good to go.
For connecting with the CC I will sketch

Saipro:

The 1500VA APC I have in storage here has an efficiency comparable to most inverters I've tried. It's however an online UPS (belonging to the line-interactive series), whatever that's supposed to mean (it syncs its output frequency to that of the input, so long as it's within acceptable limits and in a way, runs as a continuous inverter - which is fine for off-grid installations). It's a 24V unit and has a tare consumption of roughly 25W (measured with a clamp meter and a WizBang Jr.)


Check this link.
Read this too for understanding delta conversion online UPS

The low efficiency referred to is a function of the continuous supply of the load by the inverter even when there's grid power (it first converts to DC then back to AC, protecting from surges, brownouts and whatever distortions/disruptions there might be). The inverter itself is very efficient. The online function can be disabled via the management software and it functions in mere passthrough mode.

It handles surge current draw devices just fine and can power either of my freezers or a freezer, not more than one at a time thought there's a trick to making it power two of them.

cool. this is what i am using right now. it is more efficient and better than my mustpower 3kva

funken:
Gurus, I have a Fangpusun 150/70 with a 48v 200ah Ritar AGM battery bank (8 batteries), 9 250w solar panels in 3s3p configuration and I am experiencing it going into float prematurely - hence it does not fully charge the batteries. If I am lucky it charges it up to 53.7v I have read online that this is a problem with the algorithm as it senses the voltage at sun up and uses it to calculate how long absorption time will be.
Absorption voltage currently set to 56v and float is 55.4v.

Is there a workaround that one can adopt? I see they have resolved this in the Victron v1.42 firmware but as we are stuck with the v1.16 what can one do?

cc @earthrealm
@GeorgeD1
@SolnergyPower
@NiyiOmoIyunade
@bigrovar
@ zeestone99
@pranil

I have the Victron and I have the same issue too. I also use the Conext MPPT 60 150 and it does not have the issue. My lithium ion batteries don't get fully charged with the Victron. It goes into absorbtion and float very quickly. Raise your float voltage and see if it helps.

Namzy:

Thanks for replying. What's flashbar and what type of sealant works best?

zinc plaster as below. cost less around N100-N200 per yard depends on location

idsolar:


zinc plaster as below. cost less around N100-N200 per yard depends on location

The installer used this but it's still leaking

Please I need list of some good American inverter battery and their prices here in Nigeria. Thanks

Namzy:

The installer used this but it's still leaking

Use silicon gun abi gum. Its a big syringe like device that you push out the paste from. It can seal up difficult to reach areas.

GeorgeD1:


brother,
long time indeed. it's been a while.
so talking about this setup of yours, is there any particular reason you're choosing to go this route of used battery and
new battery combo? also the pwm option seems rather strange especially for a lifepo4 charging regimen.
personally i believe anything worth doing at all is worth doing well. i would rather advise a serious rethink on your part
and possibly (if it's not too late) plan to purchase new batteries of similar specs and a proper mppt cc that will give you
rest of mind.

I never intended to go this route, some pages back I posted how I came about 4 LiFePo4 batteries (3-new, 1-used). The batteries were forgotten somewhere until dishtech responded to a post about the same type of batteries, being charged with solar.

In fact after acquiring the batteries and it didn't fit the purpose, I made extensive research online (solarpaneltalk dot com & others) without any positive way of safely charging it with solar. Dishtech is using PWM CC with solar to charge successfully for sometime. So, I had to revisit the forgotten batteries and see how best to utilize it.

Dishtech:


As I mentioned earlier, either use two from the new ones to get 24volt or buy another one new one to make 2s2p, or confirm that both batteries have the same voltage level by charging them to full capacity and leave them for 24hr or more if the new is the same with the new then you are good to go.
For connecting with the CC I will sketch

The sketch is for regular batteries, which i already know from reading this thread.

Please, see sketch attached, as you are aware the LiFePo4 brand has discharge and charge lines separate discharge lines are in series, giving 24V which is clear to me.

My question is should i connect the charging lines to the PWM CC parallel as in my sketch or I also have to connect them in series like the discharge lines.

Note the batteries comes with separate lines unlike regular batteries with only one for charging and discharging.

Thanks for your response.

Namzy:

The installer used this but it's still leaking

let him enter d ceiling, look up d zinc, and seal off d exact leaking points. check @trippledot advise also

bisi12004:

Please I need list of some good American inverter battery and their prices here in Nigeria. Thanks

USA Trojan 12v 205a battery ...... N169,000
Hoppecke 12v 150a battery(Made in Germany) ........ N120,000 , 6v 200a ... N68,000

Smartcellglobal services,
081-350-31951

microgiant:


The sketch is for regular batteries, which i already know from reading this thread.

Please, see sketch attached, as you are aware the LiFePo4 brand has discharge and charge lines separate discharge lines are in series, giving 24V which is clear to me.

My question is should i connect the charging lines to the PWM CC parallel as in my sketch or I also have to connect them in series like the discharge lines.

Note the batteries comes with separate lines unlike regular batteries with only one for charging and discharging.

Thanks for your response.

You should connect them in series like the discharge line

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Please don't do this. You will short out those batteries and you're at the risk of causing fire.

On top, you have a series connection with one cable running from +ve of one battery to -ve of the other battery and then on the charging side, you're connecting in parallel, +ve to +ve, -ve to _ve. You're essentially connecting the two terminals on one battery together!

Best bet is to match your charging and discharging voltage setup 12v/12v or 24v/24v. You can't do 12v/24v except you have a manual shut of so that the two cycles aren't operational at the same time which is very stressful to achieve.

microgiant:


The sketch is for regular batteries, which i already know from reading this thread.

Please, see sketch attached, as you are aware the LiFePo4 brand has discharge and charge lines separate discharge lines are in series, giving 24V which is clear to me.

My question is should i connect the charging lines to the PWM CC parallel as in my sketch or I also have to connect them in series like the discharge lines.

Note the batteries comes with separate lines unlike regular batteries with only one for charging and discharging.

Thanks for your response.

chris81964:

I have the Victron and I have the same issue too. I also use the Conext MPPT 60 150 and it does not have the issue. My lithium ion batteries don't get fully charged with the Victron. It goes into absorbtion and float very quickly. Raise your float voltage and see if it helps.

The new MPPT firmware update fixes this issue. The corresponding VictronConnect app hasn't been released though.

JUO:
Fangpusun flex max 80a 140k
Fangpusun flex max 60a 110k
Fangpusun blue solar 30-70a 33k for 30a, 42k for 50a, 100k 60a, 110k for 70a
Xtm 3.5kw/48v 460k
Price valid until 10/09/2019

one day to go

microgiant:


The sketch is for regular batteries, which i already know from reading this thread.

Please, see sketch attached, as you are aware the LiFePo4 brand has discharge and charge lines separate discharge lines are in series, giving 24V which is clear to me.

My question is should i connect the charging lines to the PWM CC parallel as in my sketch or I also have to connect them in series like the discharge lines.

Note the batteries comes with separate lines unlike regular batteries with only one for charging and discharging.

Thanks for your response.

Both terminals can be used because the positive have parallel connection internally. But for me I cut off the black and red plug because it has higher wire gauge. So that is what I used.

Saipro:

The new MPPT firmware update fixes this issue. The corresponding VictronConnect app hasn't been released though.

How recent is the firmware? Thanks

Dear bosses and enthusiasts,
I looking forward to buying a solar system for my apartment that can load my 2 TVs and either my double door refrigerator/freezer or my 2HP AC with 6 bulbs and 2 rechargeable fan. Please can you advice me on which to get and which not to get? I want about 8-12 hours juice, thanks in advance.

Bolatitodavies:
Dear bosses and enthusiasts,
I looking forward to buying a solar system for my apartment that can load my 2 TVs and either my double door refrigerator/freezer or my 2HP AC with 6 bulbs and 2 rechargeable fan. Please can you advice me on which to get and which not to get? I want about 8-12 hours juice, thanks in advance.

It all boils down to choice, quality of equipments and budget.
You can call/whatapp 08117398294 for consult. Or.
Email info@mazinegroup.com

Dishtech:


First how many battery do you have?
Secondly what is your inverter voltage?
You can use the ups which I think is 24volt but must attached fan internally on the MOSFETs and should not exceed 600watt load on it because most ups you see are over rated and are designed to handle load within a short period.

He mentioned having Lithium Polymer batteries. I think that calls for more stringent charging conditions which that SCC may not provide, except if the charging parameters are user customisable.

I think he should avail the forum the voltage of his lithium battery, if it has in built BMS and also if his SCC is customisable.

microgiant:
Hello GeorgeD long time. I am trying to go into a kind of mini solar.

@dishtech

I got the PWM CC 12V/24V 60A. see pictures attached. My questions are

1. How do I connect the wires (a) parallel to the PWM CC, or (b) series? Note: batteries are LiFePo4.
2. Can I use a 1500VA MGE UPS?

Your batteries are Lithium Polymer batteries. I think that calls for more stringent charging conditions which that SCC may not provide, except if the charging parameters are user customisable.

I think you should avail the forum the voltage of your lithium battery, if it has in built BMS (an uploaded picture of the rating on the label might suffice enough info) and also if your SCC is customisable.

microgiant:


I mentioned 4 earlier and asked if it can be connected in series/parallel. You confirmed it can be done, which I believe is for the discharge line to make it 24V for use with a 24V inverter/UPS.

You also confirmed it can be charged with solar using a PWM CC which is why I purchased it (PWM CC). My question now is since the battery has separate charge and discharge cables, how do i connect the two batteries to the PWM CC? Note: I intend to connect in series for 24V output.

I also mentioned that one is a used battery which you also advised against using it, otherwise my initial intention was to parallel and series 2S2P.

Thanks for you support.

I don't think your 12v lithium is designed to be connected in series to get multiple values. The BMSes usually don't work that way except maybe a recent development sha.
T
He best you can do with those nominal 12v lithium batteries is connection in parallel and you can easily do that with the different charge and discharge cables that come from the battery.

If you require 24v lithium, you will have to go for Lithium already manufactured with a 24 volt nominal and 24v BMS.

ceaser:


Your batteries are Lithium Polymer batteries. I think that calls for more stringent charging conditions which that SCC may not provide, except if the charging parameters are user customisable.

I think you should avail the forum the voltage of your lithium battery, if it has in built BMS (an uploaded picture of the rating on the label might suffice enough info) and also if your SCC is customisable.

Thanks for your input. Please see attached pictures.

Pic. 1 Label
Pic. 2 battery with connections, single black line is for charging, black and red cable is for discharge.
Pic. 3 battery with follow come charger.
Pic. 4 Shows the charger and battery

ceaser:


I don't think your 12v lithium is designed to be connected in series to get multiple values. The BMSes usually don't work that way except maybe a recent development sha.
T
He best you can do with those nominal 12v lithium batteries is connection in parallel and you can easily do that with the different charge and discharge cables that come from the battery.

If you require 24v lithium, you will have to go for Lithium already manufactured with a 24 volt nominal and 24v BMS.

Dishtech is already using the same type of batteries in series and charging with solar using PWM CC. The PWM CC has user programmable parameters.

chris81964:

How recent is the firmware? Thanks

This month