Change generator output from AC to DC and use PV in inverter as backup solution - good solution to use generator in your system.

[Rednecktek]

2) split phase 240v genny may be a problem. Because of neutral, you may need to put each line into a separate mppt. Now you have 60v on average on each line. Most AIO need about 100+ min voltage. 120v genny would be the same problem. Let's say you clip the 100-120v range, is that bad for the genny?

The whole point of gong to DC and through the MPPT is to make the 120v/240v a non issue. The minimum voltage may be an issue though. These high voltage requirements can be a PITA at times. That's one of the reasons I use the AIO's that I use is they don't require hundreds of volts and long strings of panels to charge a 24v battery.

What's the minimum on the 6000xp?

 

[wpns]

Ya know, that sounds like a pretty cheap solution to the charging issue folks have with small 120v generators and 240v inverters. Rather than dropping hundreds of dollars on a 240v generator or a chargeverter that can only use 1/2 or less of it's capabilities, a rectifier, a big oll' capacitor, and an old computer heat sink should do the trick, right?

Yup, unless something blows up, as discussed above. You try it on your system and let us know how it goes. Remember every vendor will be different.

 

[Bossman253]

There is another solution, how about buying microinverter 1phase like easun 6kw and link genny to ac in, batt out to main system. Then we got additional pv input and we are passing all that noisy ac thru other inverter

 

[Jim_in_Sav]

What the Gentleman from Poland is alluding too, is if he uses a chargeverter, it charging the batteries and the inverter sees voltage, but if he hooks DC straight to inverter, the inverter knows the SOC of the batteries. but what the other folks are telling the Gentleman is that, if inverter is already measuring SOC, then charging right to the batteries will not change what the inverter sees.

 

[smr.ruby]

I know this doesn't answer OP concern but for those looking to solve this with a new generator: Delta DC generator. Several of these on the resale market for darn good price. 7500 watt 48Vdc for <$1500. https://www.ebay.com/itm/2566099698...ZFRoK8ITMq&var=&widget_ver=artemis&media=COPY

 

[Bossman253]

"False reading" is an issue when inverter controls battery charging based on battery voltage, and not comms. The inverter sees 50v and turns on the generator. The chargeverter puts charge voltage on the battery connection (say 55v), and the inverter gets confused. The inverter isn't supplying the charge voltage so doesn't know what happened.

CV2 where the CV2 controls the generator solves that problem.

Okay, so i have been diging that JKBms and Deye will not work by coms, i cant connect them together with coms as jkbms is still in beta for deye inverter. So in this situation how do i not messup inverter readings from battery when chargeverter works ?.

Cv2 is generator switching on and off ? Or it does other function ?

 

[Bossman253]

What the Gentleman from Poland is alluding too, is if he uses a chargeverter, it charging the batteries and the inverter sees voltage, but if he hooks DC straight to inverter, the inverter knows the SOC of the batteries. but what the other folks are telling the Gentleman is that, if inverter is already measuring SOC, then charging right to the batteries will not change what the inverter sees.

Indeed. And now i see that it will be problematic to connect jkbms to deye so i can setup inverter only to get voltages from battery and in this situation, „false readings” will occurr for inverter if chargeverter will be on.

How to solve it ?

 

[Pancreas6457]

I know this doesn't answer OP concern but for those looking to solve this with a new generator: Delta DC generator. Several of these on the resale market for darn good price. 7500 watt 48Vdc for <$1500. https://www.ebay.com/itm/2566099698...ZFRoK8ITMq&var=&widget_ver=artemis&media=COPY

I've got one of these and it doesn't work the way you'd expect it to.

When it's done charging the batteries it stays on to supply the load until the grid comes back (or your solar is able to take over fully).

 

[smr.ruby]

I've got one of these and it doesn't work the way you'd expect it to.

When it's done charging the batteries it stays on to supply the load until the grid comes back (or your solar is able to take over fully).

I don't follow your statement "stays on to supply the load until the grid comes back." Unless you modify the controls on the unit the only thing the generator knows is the voltage it observes from the battery bank that it is connected to. It has no idea if the grid is up or down.

The "auto" sequence of operation is pretty simple. It comes on at 48V and off at 53V here is the manual https://woodstockpower.com/wp-content/uploads/2022/12/534425877-User-Manual-ESOG150-PCA01-18-4.pdf

the 48V on setting is in the PLC but the 53V off setting is in the Alltrix DC/DC controller which is easy to change. I have mine set to 48V on and about 54V off.

If the grid comes on or solar comes on then you get to 53V sooner and it shuts off sooner. I ended up buying a second one (both used) and they both work great.... except in both of them the large contactor was bad (too much voltage drop). On one unit it was just annoying and on the other unit it prevent it from starting. The only thing that contactor is for is to allow you to use separate starting batteries so if you are starting from your main battery bank it is fine to bypass that contactor.

I've managed to download the software for the Alltrix DC/DC converter and other components if you want more info I can share.