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 > Samlex Inverter Power Draw Question

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full_mosey

Oklahoma

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Posted: 07/11/21 05:14am Link  |  Quote  |  Print  |  Notify Moderator

Itinerant1 wrote:

full_mosey wrote:

Itinerant1 wrote:

EMD360 what brand of lfp batteries are you using? Don't they have low temp protection,
...


Splitting hairs here. You have manufactured LiFe 'batteries'.

LiFe cells do not have temp protection. You have an assembled battery of LiFes where the inclusion of a BMS can do the protecting.

HTH;
John
Future LiFe DIYer


What are you talking about???


If you're going to split hairs how about your abbreviation for LiFePO4 or the commonly used abbreviation LFP so not to confuse new comers to the meaning of "life". [emoticon]


I am talking about the difference between a cell and a battery.

Also, you don't seem to object to our friend KJINTF when he calls them LIFE.

HTH;
John

KJINTF

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Posted: 07/11/21 07:02am Link  |  Quote  |  Print  |  Notify Moderator

full mosey
You are correct - there is a difference between Cells and a "Battery"
To confuse things even more my cells are LiFeMnPO4 200amp prismatic
I strapped 4 of them together and bolted on connections to make my "Battery"
I almost always refer to the cells as LiFe or LIFE only because most folks get confused with the Mn / Manganese (hope its spelled correctly)

Itinerant1

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Posted: 07/11/21 07:35am Link  |  Quote  |  Print  |  Notify Moderator

KJINTF are your cells GBS? I use "LFP" but technically it would be "LFMP", I figured why confuse the crowd.


12v 500ah (5,120Wh usable), 20 cells_ 4s5p (GBS LFMP battery system). 8 CTI 160 watt panels (1,280 watts)2s4p,Panels mounted flat. Magnum PT100 SCC, Magnum 3012 hybrid inverter, ME-ARC 50. Installed 4/2016 been on 24/7/365, daily 35-45% DOD 1,800+ cycles.

KJINTF

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Posted: 07/11/21 08:12am Link  |  Quote  |  Print  |  Notify Moderator

Have to agree - no need to confuse the crowd or start an argument

Yes, I believe the Li system uses GBS cells not 100% sure since they have been in there for going on 7 years now. Don't even see them (do remotely monitor the cells and pack status) for years at a time they simply work. Unfortunately I still have 200amp/hrs of the old heavy high maintenance FLA GC batteries that demand attention almost every trip.

* This post was edited 07/11/21 08:47am by KJINTF *

StirCrazy

Kamloops, BC, Canada

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Posted: 07/11/21 09:42am Link  |  Quote  |  Print  |  Notify Moderator

EMD360 wrote:


I have the new version of the PD charger/converter. So the bulk charge at 14.6 does drop to a maintenance charge. I know I don’t have quite enough battery power for the inverter. But to run the microwave I needed 20 amp capability. 2000 watt inverters are only 15 amps.
So it’s rather an expensive investment for just 210 ah rating. I’m counting on the 10 years some folks give it.


I didnt see your Battery set up till this post, for what you are trying to do it will work, you should get bounce back like a few have said, but I also agree that for what you want to run you should be up around 400ah capacity. the larger capacity the less drop you will see as its less of a load on each individual battery.

I only have a 2000watt inverter and run my microwave (900 watts) off it no problem, but that is in the 5th wheel with 420 amp hours of batteries. I am in the middle of converting to LFP on my fith wheel, just ordered a new solar controler and converter. so I replaced my expensive GC2's that lasted over 14 years and gave me 475AH to the cheepest GC2 208ah (costco)and boy am I disapointed in them, but if they get me through a season or two while I get all the new pieces set up for LFP it will be ok as when I get my cells I will be putting 840AH in the 5th wheel and 280AH in the camper (no microwave in the camper so 280AH and my solar panel will let me camp a long time with just the furnace, fridge, waterpump and lights)

Steve


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BFL13

Victoria, BC

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Posted: 07/11/21 10:58am Link  |  Quote  |  Print  |  Notify Moderator

Not clear on the 20 amp plug needs for that MW. I have a 2000w with 15 amp plugs-ins and run the MW pulling about 125 amps no problem (four GC2s)

A 3000w inverter I have does not have 20 amp plug-ins. It has three 15s and you can do 2000 from any one of them, but to get 3000 you have to plug something else into a second receptacle.

Inverters are tricky that way. They are not all the same for how they do that either.


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time2roll

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Posted: 07/11/21 12:19pm Link  |  Quote  |  Print  |  Notify Moderator

My 2000w inverter has a 20a GFCI duplex and hardwire provision.


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BFL13

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Posted: 07/11/21 12:37pm Link  |  Quote  |  Print  |  Notify Moderator

https://samlexamerica.com/products/3000-........att-pure-sine-wave-inverter-pst-3000-12/

I see it does have 20R.

MEXICOWANDERER

las peñas, michoacan, mexico

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Posted: 07/11/21 01:41pm Link  |  Quote  |  Print  |  Notify Moderator

Please refrain from hair-splitting. I have so few, multiplying by a factor of 2 is futile. [emoticon]

EMD360

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Posted: 07/12/21 10:58am Link  |  Quote  |  Print  |  Notify Moderator

I’m not as knowledgeable as many of you. Because the MW was on a 20 amp breaker by itself I assumed it needed up to 20 amps. The specs of the 2000 watt inverters I saw were up to 15 amps. I assume that more expensive units might have larger capacity. The Samlex is considered a mid-level quality inverter as I understand the recommendations. I was leery if the cheapest because there are many comments about them not lasting. This one was $860 on Amazon Prime. I like getting the item relatively quickly. I’m not using the plug ins on the inverter itself. I have it hard wired to the transfer switch that is only operational when the shore power and charger are off. I don’t have to remember to turn off the charger. The Samlex has an optional hard wired remote that allows me to turn it on and off and reads the stats such as voltage and amp draw. SOC is on the Victron monitor.
I have not had a chance to test running the inverter longer with a high draw heater. I’m curious if the fully charged battery can take more inverter load.


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