DC Gas Generator 48v-54v w/EG4 Inverter

[ChrisG]

Saw a video today on this product. Interesting gas DC generator with 2-wire start working with EG4 Inverter.

Direct-current generator KS 48DC-S CO

Features The KS 48DC-S CO direct-current generator from the German brand Könner & Söhnen® is designed as a backup battery charger for charging 48-54 V batteries. The generator is ideal for charging batteries used to power private households, off-grid, solar, wind, telecommunication systems...

us.konner-sohnen.com

 

[doing it different]

Quite neat,

Seems like it will only max 54v.... 16 cells that's 3.375v per cell.

I would like to see, some adjustable ness for the voltage...

 

[timselectric]

60a isn't bad. And DC direct charging is going to be more efficient. My only concern is the DC cables. They might need to be pretty long to get the exhaust out to a safe distance, depending on where your system is located.
My garage system inverter is outside, so it would be easy. But it would take 50' cables for the house system.

 

[doing it different]

I know someone will not like it.
But it could stay in the garage and extend the exhaust out the building on an outside wall. At least you can save some heat in the garage for the winter.

 

[timselectric]

I know someone will not like it.
But it could stay in the garage and extend the exhaust out the building on an outside wall. At least you can save some heat in the garage for the winter.

Nothing wrong with that, as long as you extend it above the roof line (3' I think).

 

[doing it different]

Nothing wrong with that, as long as you extend it above the roof line (3' I think).

Yeah if it was me I would just punch a hole through the wall... but I don't always listen.

 

[seneysolar]

Kohler makes a full size off grid specific DC generator, not cheap though. $5500

Kohler

The KS one on the video is priced right,i see $1500 on Amazon. Good bargain considering you can omit the new $700+ chargeverter

Amazon

ive noticed alot of cheap DC generators lately, marketed as parking generators or range extending generators.

Theres some military versions out there too if you are looking. I have a 24V one that can do 100A. I paid $200 and it only had 11 hours on it.

 

[ScrodusGargleRotten]

Funny that its a nearly PERFECT charge profile for 15S without coms.
If it was 47-52.8 it would be more perfect.

 

[timselectric]

Most people aren't going to charge to full from a generator.
Usually, you are just trying to get to the next sunrise.

 

[hayduke]

I had asked about this a month or so ago on the backup generator forum here but didn't get much response and decided to just go for it. Managed to get it for $1200 total direct from the manufacturer. Couldn't find much else with an autostart that wouldn't also drain the starting battery if it was on standby for long periods. I received it but haven't wired it in yet, will report back soon!

 

[ricardocello]

Video: I do not understand the purpose of the warmup time on this generator.
With normal AC generators, the frequency and voltage have to stabilize.

But this is DC. Presumably they are rectifying and buck converting down to battery voltage.
Should work immediately from startup. Am I missing something?

 

[timselectric]

I had asked about this a month or so ago on the backup generator forum here but didn't get much response and decided to just go for it. Managed to get it for $1200 total direct from the manufacturer. Couldn't find much else with an autostart that wouldn't also drain the starting battery if it was on standby for long periods. I received it but haven't wired it in yet, will report back soon!

Got a link to where you purchased it?
It's a good deal, if it's reliable.

 

[timselectric]

Video: I do not understand the purpose of the warmup time on this generator.
With normal AC generators, the frequency and voltage have to stabilize.

But this is DC. Presumably they are rectifying and buck converting down to battery voltage.
Should work immediately from startup. Am I missing something?

It's an engine warm up. So that it doesn't stall when the load is applied.

 

[ricardocello]

From the manual:

 

[ChrisG]

I had asked about this a month or so ago on the backup generator forum here but didn't get much response and decided to just go for it. Managed to get it for $1200 total direct from the manufacturer. Couldn't find much else with an autostart that wouldn't also drain the starting battery if it was on standby for long periods. I received it but haven't wired it in yet, will report back soon!

Does this use the 48v battery for autostart?

 

[ricardocello]

Does this use the 48v battery for autostart?

Yes, there is no internal battery.

 

[timselectric]

Does this use the 48v battery for autostart?

Yes, it has no on-board battery.

 

[hayduke]

Got a link to where you purchased it?
It's a good deal, if it's reliable.

Straight from the manufacturer here https://us.konner-sohnen.com/products/generator-ks-48v-dc

At first it looks like the generator is $1500 but if you add it to your cart there's a $300 discount automatically applied, plus no shipping or tax. Seems too good to be true, but here's my receipt and the generator arrived 3 days later. I just checked and I'm seeing the same deal on their website still.

 

[ChrisG]

Straight from the manufacturer here https://us.konner-sohnen.com/products/generator-ks-48v-dc

At first it looks like the generator is $1500 but if you add it to your cart there's a $300 discount automatically applied, plus no shipping or tax. Seems too good to be true, but here's my receipt and the generator arrived 3 days later. I just checked and I'm seeing the same deal on their website still.
View attachment 290507

That’s an awesome deal.

 

[ScrodusGargleRotten]

That’s an awesome deal.

But that is about the same price as a 6000 watt 240v inverter gen with the "old" price of the chargeverter.

$989 for 6000 watt gen
449 for chargeverter
--------------
$1438.00

total output 5000 watts max chargeverter and A WHOLE LOT MORE USEFULL with native 240v @6000 watts
outputting 240v so less line loss and easier cable run.

 

[ChrisG]

The auto start without needing to have a 12v battery is cool. Just connect the two wire start and 48v batt cables to busbar

 

[42OhmsPA]

That's a good price for something already built, considering what 1 of these WEN 11kW/8.3kW and 2 of these rectifiers would cost.

 

[ScrodusGargleRotten]

That's a good price for something already built, considering what 1 of these WEN 11kW/8.3kW and 2 of these rectifiers would cost.

But the dc gen is less than 4000 watts? am I missing something?

Says 70 amps

 

[timselectric]

Straight from the manufacturer here https://us.konner-sohnen.com/products/generator-ks-48v-dc

At first it looks like the generator is $1500 but if you add it to your cart there's a $300 discount automatically applied, plus no shipping or tax. Seems too good to be true, but here's my receipt and the generator arrived 3 days later. I just checked and I'm seeing the same deal on their website still.
View attachment 290507

Thanks, I'll probably be ordering one soon.

 

[ChrisG]

But the dc gen is less than 4000 watts? am I missing something?

Says 70 amps

You’re spot on, ~4kw: @70amps @54v. Fine for my use. Love the no starting battery auto start with 2 wire. Seems like a simple solution.