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Not a lot of options... Smurfs just walk away...

Rednecktek

Rednecktek

Expert Newbie
Joined
Sep 8, 2021
Messages
7,490
Location
On a boat usually.
So I'm trying to put together a parts list for my dad's camper upgrade and one problem is causing other problems... stupid physics!

The biggest issue I have is space. There isn't a lot of open space where I want to put all the guts so I'm limited to a 24v battery base because a 16s physically isn't going to fit unless I use really small, like 50ah, cells. I can fit an 8s build in there with 280's, maybe even a second battery if I mount them just right... maybe...

In a perfect world I'd get one of the 24v 3600w AIO's out there and put it between the 30a RV plug coming in and the 120v input to the converter, basically tricking the camper into thinking it's plugged into shore power all the time.

I don't think I can physically fit that in there though due to the way that end of the trailer is laid out. So, Plan B was to get a 24v base inverter/charger and separate MPPT controller because I can find room for 2 small things a lot easier than 1 large thing.

I'm just striking out on 24v based inverter charges that check the following boxes:

3500-4000w range to duplicate what a 30a shore connection can provide

NOT Midnight

24v battery based

NOT Victron

120v single output (no 240v systems)

NOT Victron

Built in ATS

NOT VICTRON

Less than $1000

So far the only thing I've found is a SungoldPower 3kw/9kw LF unit for $900. That should be plenty even to fire up the AirCon if needed, but at "up to" 88% efficiency and probably near 60w of standby power, it's a tough pill to swallow. Any other options?

I'll be pairing it with a HQST 60a MPPT controller and probably 1200-1800w of panels (roof space willing) with a 280 or 304ah battery and 150a BMS home build.

Hopefully when I get home and start crawling around with a tape measure I'll find a way to get a 48v 280k build in there, so 48v recommendations woukd be helpful too.

Thanks all!
Oh, and NO VICTRON!!
 
How about Fangpusun then ;) :ROFLMAO:...

mppt-solar-charge-controller16174265360.jpg
fangpusun-datasheet-battery-balancer-en54056358459.jpg
 
is it a cost thing or I just do not want my penis to turn blue thing? if cost is not an issue any of the 24 volt magnums are pretty stout. the 4024 comes to mind. 4kw 12 x surge, built in transfer switch made in north america. all of the manuals actually make sense right off the bat. customer service has risen back up to pre-plandemic levels finally. (they had a rough patch there for a while.) set the equalization at 3.5 and hold for 20 minutes and auto run every 45 days and you get a scheduled boost to hold cells at 3.5 for balancing purposes.
 
Are not the Magnums split phase only? If so they only have half the loading per phase and therefore would be rather under powered.

Not much in the 24vDC line ups go above 3kW at 120vAC. There is a 3.2kW and the 3.6kW out there. I am presently run the Sumry 3.6kW (couple of others have this same unit under their label). Finding 24vDC LF inverter chargers that output at 6kW split phase you would be looking at Signineer, Aims, Ampinvt and a few others that relabel these. All of them are heavy bulky units.

If you go to just a 24vDC inverter there are many that are rated above 3kW although many are questionable quality and mobile inverters lack the features and control of a AIO.
 
Rednecktek said:
So I'm trying to put together a parts list for my dad's camper upgrade and one problem is causing other problems... stupid physics!

The biggest issue I have is space. There isn't a lot of open space where I want to put all the guts so I'm limited to a 24v battery base because a 16s physically isn't going to fit unless I use really small, like 50ah, cells. I can fit an 8s build in there with 280's, maybe even a second battery if I mount them just right... maybe...

In a perfect world I'd get one of the 24v 3600w AIO's out there and put it between the 30a RV plug coming in and the 120v input to the converter, basically tricking the camper into thinking it's plugged into shore power all the time.

I don't think I can physically fit that in there though due to the way that end of the trailer is laid out. So, Plan B was to get a 24v base inverter/charger and separate MPPT controller because I can find room for 2 small things a lot easier than 1 large thing.

I'm just striking out on 24v based inverter charges that check the following boxes:

3500-4000w range to duplicate what a 30a shore connection can provide

NOT Midnight

24v battery based

NOT Victron

120v single output (no 240v systems)

NOT Victron

Built in ATS

NOT VICTRON

Less than $1000

So far the only thing I've found is a SungoldPower 3kw/9kw LF unit for $900. That should be plenty even to fire up the AirCon if needed, but at "up to" 88% efficiency and probably near 60w of standby power, it's a tough pill to swallow. Any other options?

I'll be pairing it with a HQST 60a MPPT controller and probably 1200-1800w of panels (roof space willing) with a 280 or 304ah battery and 150a BMS home build.

Hopefully when I get home and start crawling around with a tape measure I'll find a way to get a 48v 280k build in there, so 48v recommendations woukd be helpful too.

Thanks all!
Oh, and NO VICTRON!!
Click to expand...
www.solar-electric.com

COTEK SP3000-124 3000 Watt 24 Volt Pure Sine Wave Inverter

COTEK SP3000-124 3000 Watt 24 Volt Pure Sine Wave Inverter
www.solar-electric.com www.solar-electric.com
 
So it's not just me then. All the 24v inverters in that range are either inverter only or inverter/chargers that are LF. I feel better. HF would be fine on a 4kw as I can already start his aircon even on a 15a 120v outlet (barely) and the extra efficiency and reduced standby would be handy.

Daddy Tanuki said:
is it a cost thing or I just do not want my penis to turn blue thing?
Click to expand...

It's a Mac thing. Long rant. 😉

Daddy Tanuki said:
if cost is not an issue any of the 24 volt magnums are pretty stout. the 4024 comes to mind
Click to expand...
Price is very much a factor. I can only afford so much and I have to do everything in one push from panels to wires to battery builds so budget is a concern. Spending $$fatcash for a top of the line tier-1 name brand inverter means no battery or wires or panels or shunt or... or... or... yeah.
 
Mattb4 said:
Are not the Magnums split phase only? If so they only have half the loading per phase and therefore would be rather under powered.

Not much in the 24vDC line ups go above 3kW at 120vAC. There is a 3.2kW and the 3.6kW out there. I am presently run the Sumry 3.6kW (couple of others have this same unit under their label). Finding 24vDC LF inverter chargers that output at 6kW split phase you would be looking at Signineer, Aims, Ampinvt and a few others that relabel these. All of them are heavy bulky units.

If you go to just a 24vDC inverter there are many that are rated above 3kW although many are questionable quality and mobile inverters lack the features and control of a AIO.
Click to expand...
no the PAE series are 240 split phase the MS series and MSH are 120 single phase. the 4024 is 4kw the 2024 is 2kw both are pretty much bullet proof, just the price might scare some away. both have been on the market over a decade and there are litterally no bugs with the systems or the add ons, (PV controllers, shunt based SOC, auto genstart, etc.).
 
Rednecktek said:
So it's not just me then. All the 24v inverters in that range are either inverter only or inverter/chargers that are LF. I feel better. HF would be fine on a 4kw as I can already start his aircon even on a 15a 120v outlet (barely) and the extra efficiency and reduced standby would be handy.



It's a Mac thing. Long rant. 😉


Price is very much a factor. I can only afford so much and I have to do everything in one push from panels to wires to battery builds so budget is a concern. Spending $$fatcash for a top of the line tier-1 name brand inverter means no battery or wires or panels or shunt or... or... or... yeah.
Click to expand...
then if its cost look at samlex, or cotek with samlex being the preferred unit. samlex's price has risen with its reputation... 10 years ago they were a steal, i bought one of the little 300 watt units to use as a point of power in my camper and the damn thing will start a minifridge... yeah I tried.. it started it 3 times out of 5 tries so thats pretty amazing to me. I also bought a 2k unit that I later sold to my friend... its been in every jeep he has owned since then... but we had to run2 gauge cables to a winch connector so that he could plug it in an use it.
 
Daddy Tanuki said:
no the PAE series are 240 split phase the MS series and MSH are 120 single phase. the 4024 is 4kw the 2024 is 2kw both are pretty much bullet proof, just the price might scare some away. both have been on the market over a decade and there are litterally no bugs with the systems or the add ons, (PV controllers, shunt based SOC, auto genstart, etc.).
Click to expand...
Been awhile since I glanced over their products but besides the hefty price I seem to remember they were like Victron where you needed to buy other devices in order to set and operate them.
 
Mattb4 said:
Been awhile since I glanced over their products but besides the hefty price I seem to remember they were like Victron where you needed to buy other devices in order to set and operate them.
Click to expand...
depends upon what you want to do. for straight up inverter only then no issues, if you want to set a custom battery profile then you need one of the controllers.... I have several and if a forum member needs one I will send it along with instructions on how to use for postage there and back.

Once you have it set you no longer need the controller, through it does allow you to monitor several items if you are a data nerd (no disrespect) just do not know what to call a data freak that is not combative.... victron people are easy... just call them smurfs... if they are strong willed like Sunshine, then call them Pappa smurf, if they are little bitches call them smurffette :LOL: other wise a simple smurf will suffice, like Brucey for instance he is a smurf a pretty cool one at that, never a single smurffette comment from him.
 
Q-Dog said:
What is the price? I don't want to make an amazon account just to see the price.
Click to expand...
samlex's prices can be viewed on their website I believe. been a while for me. they used to be inexpensive, but as their Quality showed their name brand recognition went up and so did their prices. i bought the 300 watt one for about 130.00 shipped if I remember correctly.... and its a bullet proof little bastard for a HF inverter of its size.
 
wpns said:
Amazon will give you prices without an account, and I'm getting similar results from searches there whether I'm logged in
or not.
Click to expand...
In this case you have to put it in your shopping cart to see the price. Can't do that without an account.
 
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