EcoFlow Delta 3 Max Plus with Harman P61A – Will It Work Without Changing DIP Switches?

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Warm Vibes

New Member
Nov 9, 2025
3
Delaware Water Gap
I’m thinking about purchasing an EcoFlow Delta 3 Max Plus. My goal is to keep my Harman P61A pellet stove running for a few hours during a power outage before I have to set up my gas generator outside.

My understanding is that because the Delta 3 Max Plus provides a pure sine wave output and has a built-in UPS, I can plug the EcoFlow into the wall outlet and plug the pellet stove into the EcoFlow without having to change any of the Harman P61A’s DIP switch settings. Does this sound right, or is there anything I'm overlooking before I make this purchase? Thanks



 
I think it should work just fine once the Ecoflow is setup as a UPC. Personal opinion it’s overkill fiat just the stove. Ind some more users for it.
 
I have that same station and it works fine with a Harman P43 just plugged straight in (I also use a D2M for my P61a).

When I am out of town, I place an APC UPS between the D3MP and the stove in case there is an extended power outage and the station runs out of juice. That way, the stove will gracefully shut down. If you chose to do that - you may have to mess with dip switches depending on the year of your stove (my 2013 & 2014 stoves didn't need changes).

I also use my stations for other things during the summer using solar panels to charge them.

Make sure you read the manual and understand how to actually turn the station completely off as well as the maintenance needs every 3 months or so.