I’m sure someone will help you figure out how to get this working but first go onto the new member introduction section and just write a quick introduction about yourself or the moderators will close this post.

 

Aaaactually, Ecoflow would be the best source for info on how to charge its products. My daughter bought one of their units. Says it can be charged by solar. This tells me you can probably set it up to accept 12volts( nominal) directly. An inverter would be an unnecessary step I think. Note: unqualified "I think" Others may have better data. R.

 

You can connect an inverter directly to the promaster battery but you will drain the battery using the inverter if the van is not running.
If you search here for how to connect a B2B or DC to DC charger you will see how others have connected cables to the promaster battery.

I notice you are getting advice about inverter size in another thread.

connecting B2B charger to 'upfitter&#039...

has anyone tried to connect 6awg wire to the post on the battery box. I am hoping to connect a B2B charger to it at the site where the upfitter connection is currently. I plan to just disconnect the upfitter wire and replace with the 6 gauge wire that I ran from the back. unfortunately, all the...

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Search results for query: connect dc to dc

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I think you'll be fine with the 1800 watt model. The inverter may trip if you try to draw 1800 watts without the engine running, but that depends on how many watts your EcoFlow draws while charging. Inverters trip when the engine battery can't keep up with the draw from the inverter. I have a 2000 watt inverter (connected to the coach battery) and my largest draw is an electric kettle that works with or without the engine running, but I try to only use it with the engine running to keep the house battery from draining so fast. If I try to draw the full 2000 watts from my inverter it trips because the battery can't supply it with that much power. You should install the inverter as close to the battery as possible, and I would place an inline fuse on the positive wire at the battery.

If the inverter has an option for a wired remote it will draw a small amount of electricity from the battery even when the switch on the inverter is off. In that case you would want a heavy-duty on/off switch on the positive wire so you can completely shut it down when parked for a long time to avoid the parasitic draw. I think a disconnect switch is always a good idea so you can safely work on it without needing to disconnect from the battery.

You likely do need to ground the metal case of the inverter to the metal body of the van, but the instructions that come with the inverter will tell you if that's needed. The wire that grounds the inverter case doesn't need to be the same size as the ones that go to the battery.

I would not try using a 3000 watt, 240 volt inverter on the engine battery.

 

I tried to power two different inverters off the van battery to charge my house battery bank. I couldn't get either to stay on reliably even with the van running.

Your mileage may vary.

 

I have a Bluetti AC 200P portable power station and not the Ecoflow Delta, but I do use the "Orton method" for charging from my van's battery. I ended up going with a 1200 VA unit from Victron. In terms of sizing the inverter and deciding how best to charge your Ecoflow, I would suggest going to your AC charging brick and looking at the amps that it outputs (and at what voltage.) Assuming a 12 volt inverter, multiply these amps by 12 to get a rough idea about sizing the inverter for your Ecoflow. I would suggest increasing that by 25-30% just to accommodate any initial surge and allow for a safety margin. One thing to keep in mind is that you van's battery and alternator are there primarily to serve the electrical needs of the vehicle. Typically they are sized to meet the surge associated with turning over your engine to start, but things like electronic controls, radios, fans, AC, etc still have a fairly continual draw on the battery (which the alternator will replenish). I recall a thread on this site where someone broke down these ongoing loads, but my rule of thumb is to try and keep my non-vehicle draw off of the van's battery below about 80-90 amps (for the 220 amp alternator.) Keep in mind that with all of the built-in electronics in the van, if the state of charge of the battery gets too low it can affect a lot of things in unexpected ways.

 

See here:

Inverter size?

I'm not sure why you want to spend big money to buy and install an inverter when an affordable DC to DC charger will get it done more efficiently. Then again, you did buy a Delta Pro...

 

It looks like the Ecoflow Delta has a DC input that can be used to charge its battery and it is labeled: "Car Charging 12V/24V, 8A". Use this input port to charge the battery, it is the safest approach. This way it will protect the vehicle battery and alternator from damage.
You need a device called DC-DC Charger made by Victronenergy model Orion-Tr Smart 12/24-10 (240W). This device needs to be wired to your car batery (12V, 20A input) and the output (24V, 10A) connects to your Ecoflow Delta via a connector (Ecoflow provides?).
The Victron Orion-Tr can be configured via Bluetooth (software downlodable from Google store) to protect the Van battery and provides the correct voltages and limits.
You will not get the fastest charging, but what hurry do are you in?
We use a simular setup to charge a Titan Point Zero battery when driving. Works great and we never had issues.

 

It looks like the Ecoflow Delta has a DC input that can be used to charge its battery and it is labeled: "Car Charging 12V/24V, 8A". Use this input port to charge the battery, it is the safest approach. This way it will protect the vehicle battery and alternator from damage.
You need a device called DC-DC Charger made by Victronenergy model Orion-Tr Smart 12/24-10 (240W). This device needs to be wired to your car batery (12V, 20A input) and the output (24V, 10A) connects to your Ecoflow Delta via a connector (Ecoflow provides?).
The Victron Orion-Tr can be configured via Bluetooth (software downlodable from Google store) to protect the Van battery and provides the correct voltages and limits.
You will not get the fastest charging, but what hurry do are you in?
We use a simular setup to charge a Titan Point Zero battery when driving. Works great and we never had issues.

Hi @nicknkelly

asked & answered here “post #11” (IIRC this thread was locked for a while due to no introduction);

Inverter size?

Hi I am new Here. I have a 2017 1500 High roof. Maybe you can help? What is most wattage power inverter I can use straight off the battery and factory alternator? Do not want to add another battery... Would a 2000w over tax the system? 2nd part, This is a hard one. How can I get the inverter...

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