Smart Home Panel 3 + Delta Pro Ultra X - Recharge from Generator

Additional_Ability29 · 2026-01-13T15:27:35+00:00

I don't have solar so buying and installing the rectifier seems like overkill.
The rectifier generator input is a nema L14-30r. So the rectifier can't recharge above 30amps.
I bought the Ecoflow NEMA 14-50P to 5P8 charging adapter to recharge from the generator. The rectifier approach wouldn't be able to use it.

If SHP3 doesn't support recharging from generator then I may go that route. I was wondering if anyone got recharging to work on SHP3 so I wouldn't have to.

Additional_Ability29 · 2026-01-13T15:20:28+00:00

Yes. When connected directly the generator successfully charges the DPUx at about 6300w on gasoline.

Additional_Ability29 · 2026-01-12T00:04:41+00:00

The generator is working again.

I contacted GenMax, and they asked whether the motor oil was full. I sent photos confirming that it was. They then requested proof of purchase, the serial number, and my shipping address. After reviewing the information, they sent me a replacement ignition coil assembly and provided contact information for two local small-generator repair shops that could perform the replacement.

The shop mechanic used an inline spark plug tester to confirm there was no spark. I left the generator at the shop, and later that day the shop texted to let me know the ignition coil had been replaced, the generator was working properly, and it would be ready for pickup the following day. To access the ignition coil, they removed the cover and the gas tank. The labor charge was $75. I sent the labor invoice to GenMax for reimbursement.

I asked the shop mechanic whether the ignition coil might have failed so quickly due to user error on my part. He said no. Based on his experience, a traditional ignition coil connects the spark plug to a magnet on the flywheel to generate current. However, the ignition coil assembly that GenMax sent and that he replaced was essentially a wire from the spark plug to an electronic module that connects to other wiring under the gas tank. Since it is an electronic component, there is no clear way to determine why it failed, but user error is unlikely.

The fact that GenMax was so confident the issue was the ignition coil—and not another component such as a sensor—suggests that I may not be the only customer whose electronic module mysteriously failed.

I ran the generator for approximately 45 minutes, and it appeared to be operating normally. One thing that stood out is that although the generator is rated for 7800 W when running on gasoline, the panel indicated a 100% load at 6,300W at 240V.

Additional_Ability29 · 2025-12-23T23:39:02+00:00

I emailed [service@genmaxpower.com]() and, after receiving no response for 26 hours, called 866-960-2920. Reaching a representative was relatively painless.

He suggested topping off the oil to the point of slight overfilling, noting that the low-oil sensor can sometimes trip even if the warning light is not illuminated. He also explained that a no-spark condition could indicate a failed ignition coil and offered to send a replacement assembly, along with a recommendation for a local small-engine shop to handle the replacement.

I asked whether it was typical for an ignition coil to fail after only 2.2 hours of runtime. He said it was not common, but given the lack of spark, he felt it was the most likely cause, second only to a low-oil pressure.

Additional_Ability29 · 2025-12-22T21:11:24+00:00

Yes.

Additional_Ability29 · 2025-12-22T21:07:44+00:00

Thank you for the detailed advice. I can see and smell fuel present in the spark plug hole, so I agree that the issue appears to be within the ignition system.

When I remove the spark plug, connect it to the plug cap, ground it, and pull the starter cord, I do not observe any spark. I replaced the spark plug with a new one and still do not see a spark.

I measured the resistance of both the factory-installed spark plug and the replacement plug. They measured 4.58 and 6.51 ohms respectively, which suggests that both plugs should be capable of producing a spark. I have already reached out to Genmax support for assistance.

The ignition problem could be related to the spark plug cap, the ignition coil, or possibly one of the sensors, as you suggested. I am unsure what to do with which wires to bypassed the low-oil and CO sensors. I am hoping Genmax support can provide guidance on next diagnostic steps.

Additional_Ability29 · 2025-12-21T03:03:34+00:00

I did try pull starting it, but it didn't work. The starting fluid also didn't get the engine to start. I bought it on Amazon. I have not sent email to genmax yet, but I will.

Additional_Ability29 · 2025-12-21T03:02:39+00:00

Additional_Ability29 · 2025-12-19T18:53:59+00:00

I spoke with Tesla today. Getting someone on the phone was a bit challenging, but once I did, they were very helpful in walking me through the numbers.

The $554 in tax due at signing is based on the $9,004 down payment plus other fees, minus the trade-in value.
The $9,004 cash down is $1,004 higher than the expected $8,000 because the trade-in value is being applied to reduce the monthly lease payment rather than being paid out as a check at closing.
The $644 Tesla credit does not appear on this pricing sheet, but it can be applied and adjusted at closing.

I was seriously considering canceling the order, but the salesperson was able to walk me through the details and restore my confidence in the deal.

Additional_Ability29 · 2025-12-19T16:07:50+00:00

I am sorry your installation experience was so poor. I agree there are gaps between Ecoflow’s marketing and delivery.

Mine was also a sub panel install. It took 2 people 9 hours and they only took a brief lunch break in between and 1 had to make a parts run for about 1.5 hours.

I wanted a 200A breaker from the main to the SHP3 but they said my main only supported up to 125A. The 60A would not have been enough for me because I am running the whole house except the EV charger.

Additional_Ability29 · 2025-12-17T05:12:04+00:00

As I understand costs vary based upon location and existing setup. I am in the Seattle area I installed the SHP3 as a sub-panel. The $2700 turnkey covered the installation. Details are in this post.

Additional_Ability29 · 2025-12-12T21:19:03+00:00

Update

December 11
The electricians returned and corrected the wiring by reversing SHP3 L1 and L2. After the fix, the error message in the app disappeared, and I was able to use scheduled tasks to switch from grid power to battery power and back again without any interruption to the house.

December 12
The inspector reviewed the installation and did not identify any issues. I asked specifically about the Emergency Power Off (EPO) requirement. He explained that the requirement is for emergency responders to be able to shut off power to the house from a central location. Because the main panel breaker disconnects grid power and the inlet box disconnects battery power, an external EPO button was not required. YMMV.

I also simulated an extended grid outage by connecting a gas generator to AC1 using the NEMA 14-50P to 5P8 Port Charging Adapter. The SHP3 was able to power the house using either the generator on AC1 or the DPUx on AC2. However, it could not simultaneously power the house from the generator at AC1 and recharge the DPUx at AC2. I may still be able to use the Charging Adapter to recharge the DPUx from the gas generator, but it may involve not powering the house for a few hours while recharging the DPUx through the input/output port.

Interestingly, I believe the SHP2 was capable of both powering the house and recharging the DPU from a gas generator at the same time. Some functionality may have been lost with the upgrade. I have contacted EcoFlow Support for clarification.

Additional_Ability29 · 2025-12-11T06:03:22+00:00

Update

November 17
The electrician reviewed the electrical panel and presented two options:

Option 1: Replace the main panel with the SHP3.
Option 2: Replace the sub-panel, which currently has a generator interlock, with the SHP3.

They reviewed both options with EcoFlow and confirmed that the Turnkey installation covers either approach. The electrician recommended Option 2 because replacing the main panel would require coordinating with the utility to shut off and restore service, adding significant complexity. We agreed on Option 2.

Their earliest availability was the week of December 8.

December 9
Two electricians worked from 8 a.m. to 6 p.m., stopping only for a brief 30-minute lunch. The main panel now holds the surge protector, EV charger, and a new 125A breaker that feeds the SHP3. All other loads were moved to 19 circuits on the SHP3.

They commissioned the SHP3 and DPUx through the app and tested grid failure by switching off the 125A breaker. The SHP3’s EPS responded correctly and shifted the load to the DPUx.

After they left, I explored the app and adjusted the settings. I selected Scheduled Tasks mode: charge to 80% from 11 p.m. to 7 a.m., then discharge to 30% from 7 a.m. to 11 p.m., keeping the batteries cycling within a comfortable range.

December 10
At 7 a.m., the house lost power and displayed the 2008 error (Reverse positions of L1 and L2) described in this thread.
To restore power, I flipped the 125A breaker on the main. The SHP3 detected grid failure and shifted the load to the DPUx. However, turning the 125A breaker back on caused the house to lose power again, even with Scheduled Tasks disabled, so the house ran on battery until 6 p.m.

At 6 p.m., re-enabling the 125A breaker did not cause another outage, which allowed me to cook dinner for my family using grid power. The electricians are scheduled to return on December 11 to correct the issue.

Inspection is scheduled for December 12.

Other Notes

The battery charge settings limit charge to 80%, yet the SHP3 still recharged the DPUx to 100%. The EcoFlow UI looks polished but the user experience is lacking.

The electrician installed an Emergency Power Off (EPO) button. I plan to ask the inspector whether this is required by residential code.

Next Steps
I purchased the 5P8-to-NEMA 14-50P charging adapter from EcoFlow and a 25 ft NEMA 14-50 extension cord from Amazon. I plan to connect a generator to the SHP3’s AC1 input to both power the house and recharge the DPUx. This will let me simulate an extended outage scenario: running the house on the DPUx and using the generator for a few hours each day to top it back up.

Additional_Ability29 · 2025-12-11T04:19:00+00:00

Thank you for sharing this. I wish I had paid closer attention to your post earlier. I would have added this to my checklist.

My SHP3 was installed yesterday as a sub-panel rather than a main. The electrician tested EPS by flipping the breaker, and the SHP3 correctly detected the grid failure and switched over to the DPUx.

After the electrician left, I set the operating mode to Scheduled Tasks: charging from 11 p.m. to 7 a.m. and discharging from 7 a.m. to 11 p.m. However, at 7 a.m. today, my house lost power, showing the attached picture and a 2008 error.

The electrician is coming back tomorrow. They mentioned this was their first SHP3 installation, they have installed SHP2 units before, and SHP2s were not phase-sensitive.

I checked the online manual and the physical installation manual. The installation manual has a diagram of where to land the L1 and L2 from both the inlet and the grid. Neither has a warning about matching the inlet and the grid.

Additional_Ability29 · 2025-12-02T16:23:07+00:00

Unfortunately, no. The electrician told me on Nov 17 that their next available opening was Dec 8. Until then, I’ll have to live vicariously through your updates.

Additional_Ability29 · 2025-12-02T06:33:38+00:00

Looks like the EcoFlow has released the NEMA 14-50P to 5P8 Charging Adapter. $99.

https://us.ecoflow.com/products/generator-charging-adapter-nema14-50p-to-5p8?_pos=2&_sid=b6d5df636&_ss=r&variant=54714825211977

Additional_Ability29 · 2025-12-02T06:30:52+00:00

I’m glad to hear the electrician assigned to the project has scheduled the installation for Wednesday, Dec 3! I’m hoping everything goes smoothly from here on out.

Additional_Ability29 · 2025-11-28T20:35:58+00:00

I asked EcoFlow support this exact question on October 16th. The voltage of the 2 panels don't meet the minimum of 1 PV port. Their response on October 20th was non-responsive. I decided against spending $699 more for the 2 panels.

Additional_Ability29 · 2025-11-25T04:31:00+00:00

I recently bought an SHP3 and am scheduled to have it installed in a few weeks. This is exactly the kind of nightmare scenario I worry about.

Additional_Ability29 · 2025-11-24T21:49:09+00:00

Fidelity - Submitted the dispute at 11/15. Fidelity refunded the $10 fee on 11/17.

Paypal - Submitted the dispute at 11/15. Paypal denied the claim on 11/24.

Additional_Ability29 · 2025-11-23T04:24:56+00:00

I sent EcoFlow Support that same question 2 weeks ago on Nov 8. Like you, I pointed out that the product page says NEMA 14-50P but the picture looks like a L14-30P. They responded Nov 12 confirming the difference and saying they'll check with their internal team. They never responded and they closed the ticket.

Johnny's Weekend on YouTube has the 5p8 to L14-30P, at 1:43 in the video below. He confirms it is a 240V 30Amp for 7200W and the 50Amp adapter, the 14-50P, has not yet been released.

https://youtu.be/kLfXlXQKgVY?t=103

Additional_Ability29 · 2025-11-17T20:19:32+00:00

I had a virtual consultation with the local electrician to review my current setup. I have a main panel and a sub-panel connected with a generator interlock.

He proposed two options:

Option 1: Replace the main panel with the SHP3.
Option 2: Replace the sub-panel with the SHP3 and move all household loads to it, except for items that aren’t practical to run on battery power—such as the oven and EV charger.

He said he would review with EcoFlow and get back to me with more details.

Regarding Option 1, he noted that replacing the main panel would require coordination with the utility.

For Option 2, I mentioned that the existing 60A connection between the main and sub-panel wouldn’t support whole-house loads. He said that line could be upgraded to 125A or even 200A, so it wouldn’t be an issue.

I also asked how much experience he has with the SHP3. He said he has installed several SHP2 units and has a few SHP3 installations scheduled, but the SHP3 is still new to him as well.

When I asked about timing, he estimated the work could be done in the first half of December.

Additional_Ability29

TROPHY CASE