Charging profile scenarios for home backup
I have the Yeti PRO 4000 + Haven 10 + 3600 Passthrough cable installed for emergency home backup. I particularly wanted the automatic power switching (APS) in the event of a power outage while I am away for a few weeks at a time. The charging profile is set to Performance (min=0%, recharge=95%, max=100%). Two questions:
1) When experimenting, the recharge didn't start until well below 95%, more like 88-90%. Why?
2) What circumstances or benefits might there be to changing the charging profile to something else -- battery saver, balanced, or custom -- (remember that it's for home backup)? Would alternatives be for, e.g., -to save the battery for something else? -to keep it from discharging completely (is going to zero bad?)? -to do some best practice for storage (keep it plugged in, but at an 85% max charge because I'm home most of the time and it will just be sitting there idle? I'd top it off before going away.)??
We don't have Time-of-Use (TOU) electricity rates here.
It would be great to have some discussion, documentation, or webinar(?) to explain some of these settings. I have been looking at the documentation for other models on github, but would love some explanations targeted for the Yeti PRO 4000 and home backup scenarios.
Great product so far!!
Comments
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update re: #1 -- figured out that the AC Input Limit was set approximately at the minimum 360W and my home circuit needs exceeded that for a time. The Yeti favored discharge to my home circuits over recharging the battery. Once I experimented and increased the AC Input Limit to ~480W on the app, the 95% recharge point worked just fine for what I was running. Because I am using the 3600W passthrough cable and, hence, Power+, I would like to set the AC input higher, say towards the 3600W max, but I am timid about experimenting with that. I would be interested in other people's experiences or recommendations.
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I have the pass through cable and have adjusted the input to max 30 amp, 3600w. I can’t seem to get it to charge more than 15 amps, 1800 watts. Idk what I’m doing wrong.
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There are many 4000 PRO mysteries and it’s hard to know if something is wrong or if they just didn’t tell you enough about how to operate it, IMHO. If there’s no grid power outage, everything should operate normally, i.e., the passthrough will take the grid inputs and “passthrough” watts directly to your home circuits that you have turned on (e.g., via a Home Haven transfer switch setup). If the need isn’t more than 1800 watts, then you’ll see 1800 in and 1800 out.
Speculating here. Dumb question: By any chance, do you also have the separate AC input cable plugged into a regular household wall outlet and the 4000 PRO? That would limit input to a max of 1800. I’m not sure how the Yeti figures out which AC source to use (power+ or AC charge port) but I imagine it would favor the lower wattage for safety. You don’t need both cables plugged in.
The GZ app has some caution info about gushing in a lot of power to charge the battery, e.g. heat, stress, fan noise. Slower AC input for charging is better for the battery, but not when you have power needs or need to get the Yeti charged back up quickly. I can’t think of any reason they would have throttled the Power+ input down to 1800 for charging. 2nd dumb question: is your passthrough cable plugged into a source that can deliver 30A/3600 W? My electrician installed my 30A source outlet. If it’s only 1800, then that could explain the limit you are seeing. -
1800W is the max input, from either the power+ or regular 120v 15-20 amp outlet.
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OK. Thank you. Interesting to learn. I am not an electrician! I thought if you didn’t have any AC outputs actively running off the 4000 PRO (i.e., not APS mode), you could fast recharge the battery at up to 3600W (likely more at 3000W) using the passthrough cable plugged into Power+ on the battery side and into a 30A (40A?) source outlet installed on your house main side. Inputs could exceed 1800W. It might stress the battery, but I thought it was possible in a pinch.
GZ says you can recharge with 3000 W from solar inputs (DC).
