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You could go simple-safe with a 1-2-Off switch. There are cheaper random-brand options if cost concern is higher versus: Blue Sea Systems 6008200 m-Series Series Battery Switch 3 Position Selector, Black https://a.co/d/egzUYZK Or you could go more automated with a DC 2-way relay controlled by...

So you went with Vigo's idea for asymmetric batteries? Nice! It will be exciting to hear how well that works, particularly w.r.t. charge & discharge management. I hope y'all win!

I don't know the specs of the Yeti, but I have used that adapter successfully with Thinkpad 190W and 230W power bricks on my Bluetti.

If I understand what Vigo is suggesting, it is the same as using 6 Ionic batteries in a 3s2p config. However, instead of using 2 identical batteries for symmetric behavior, you marry 1 high-current-low-capacity battery with a high-capacity-low-current battery. That asymmetric design may offer...

Li = Lithium Fe = Iron PO4 = Phosphate Hence the label declaring it a LiFePO4 battery.

Check EarthX for some high-power while low Ah batteries. They are aircraft-rated, where safety is a bit important. I'm not sure if they can be series-connected, though. Follow-up: I looked them up and they have great specs but not the flexibility in size. At least it shows what is possible...

So I've read your posts several times now and think I have another interpretation. Are you asking if you can connect the charger input (male cigarette) directly to the Dr. Prepare? That way you can charge the Kodiak from the Dr. Prepare. If that is what you want, then the Amazon cable should...

Sorry, I don't follow. Your first post indicated using a charger on the Dr. Prepare. Are you now indicating you want to connect another battery, or the Kodiak unit, directly to the Dr. Prepare via terminal-to-terminal?

I looked up the motor ME0909 specs, and it is rated for 12v-48v, up to 4800W. Since you have been running 24v SLA, you are only using max of 2400W continuous. From my experience on ebikes, I doubt you are running 2400W all the time...the cart would reach unsafe speeds pretty quickly. It's...

The rules just say the battery must be sealed by the manufacturer. Why not use a quality li-nmc ebike 48v like this? https://ebikes.ca/shop/electric-bicycle-parts/batteries/48v-15ah-downtube-battery.html 40A BMS at 48v would be good for 1900+W of power. There is a 36v-19Ah battery also, but...

Given that it is a competition, I wonder if challenges involve speed vs. distance requiring careful battery management. Even though the motor can draw that much, they may not need to drive it that hard. It seems improbable to get a simple battery setup to drive that much power; even a...

What are the input and output voltages of that charger? I cannot tell from the picture. The cable is covering those values. Also that charger looks like it draws from the cigarette male plug and outputs to a DC 5521 or similar plug. Correct?

Are you trying to charge the Dr. Prepare battery with that charger, or charge something (Kodak == camera?) from the Dr. Prepare battery? The charger looks to me as if it does the latter. I don't have that battery, but I've watched a lot of videos on it. I believe you can do either options...

I don't follow your long description. The short one seems to indicate you intend to "switch" the solar panels from the microinverters to the Bluetti, correct? Nothing fundamentally wrong with that, but details of the implementation matters. I don't grasp how just Y connectors can achieve...

You likely need solar voltage input to 60v, presuming that e-bike battery is lithium-ion NMC. The voltage at max charge on those will be nearly 55v or 59v depending on the number of cells in series. You did not state what capacity class of station you are looking for, but that 60v requirement...

>I just need the advice on which components to replace to make it work If you don't need more than ~900W draw for a short time, then squeeze in a couple of the K2 Energy and see how long it lives. It's one of the easiest propositions. Something like this...

>The manual has: Charging cutoff voltage 58.4. 58.4v/16 cells = 3.65v per cell That indicates LiFePO4. Different manufacturers stop at 3.60v or 3.65v, depends on how aggressive they are with specs and maybe balancing. The other major form of lithium, often called Li-NMC for its constituent...

The maximum charge voltage should be able to confirm the chemistry. 16s LiFePO4 would peak at roughly 57.6v. Lower voltages should still be unique enough to identify the chemistry.

I'm a big fan of the grab-n-go capability provided by portable power stations, if you don't need a big home setup. I've used my Bluetti for travel a ton.

Any luck? I've got an EB3A pulling only 70W from a 140W panel so am interested in hearing any ideas on the topic.

Central Texas here, outside Austin but only have Austin Energy as power option. Most recent bill is $307 for 2415kWh over 31 days. About 78kWh per day for a 2100 sq ft house running all electric with 2004-ish central A/C. 12.7 cents per Wh with a generally very reliable grid. Over the past...

If you are trying to connect the EB3A battery "direct" to the external battery, that won't work. As far as I understand it, the EB3A cigarette lighter plug is "buffered" from the internal battery by a voltage regulator; i.e. it can only output power, not take in power. The only options for...

Where I am at, near Austin, the golf courses and city irrigation are all done with reclaimed water. Houses that are on the golf course can tap into that with dedicated purple pipe service. Alas, that isn't me. My A/C runs all night long these days. No room for anything but play solar, so...

Why not charge the external batteries directly via MPPT and have those feed the solar input to the power station? I've not seen any non-hacky ways to enable the power station to charge external batteries via solar and have those batteries also charge the power station once solar is gone. You...

I don't believe you can use the MPPT directly to step down the voltage. I know you can use the MPPT to charge a battery which simultaneously supplies the "solar input" port to the power station. With the Bluetti, it's best to use a 24v battery, but you could get by with a 12v battery. If...

IMO, LiFePO4 8s "24v" is the best, as that enables the EB3A to charge at roughly 200W thru the DC input port. You should be able to simultaneously charge the battery via solar with an MPPT controller. You may need to limit charging voltage of the battery to the EB3A max of 28v vs. common value...

IMO, unless this family is tech saavy, this is the perfect match fir a medium-sized power station with a good solar recharge rate and extra battery storage. If they have no tech skills, recommend they spend the extra $ on a fully engineered solution from one of the major players (i.e. Ecoflow...

I do not understand the pricing of the AC60 at $600 vs. the EB3A at $209. Given the display looks the same, I assume the AC60 is a repackaged EB3A with expansion battery connections? I would rather have 2 or 3 EB3A instead, and daisy-chain as mentioned.

>If you just hook the battery into the RV >system in parallel that’s fine but I’d >rather dump the power into the RV >battery more quickly. If you are building a new mobile system, and the RV battery is readily accessible, then one action could be to physically swap the RV battery for the newly...

>Could you charge bluetti via dc to dc >48 volt rack battery and charge rack >battery with 48 volt solar charge >controller. If you have a Bluetti with DC input up to 60v or higher, then my understanding is yes. I don't quite understand the splitter idea. If you connect the battery to the...

As an example to the OP, I have used the Victron SS MPPT 100/50 with 2 JA Solar 400W panels Voc=50v, Vmp=40v, Imp=10A, wired in parallel. Charging a 12v LiFePO4 battery with active loads, I saw a max of 660W (=50A x 13.2V).

>protect my 51.2V batteries from over- >drawing better than the built-in inverter's >40V disconnect setting. Maybe I missed this info? The Lifepower4 will protect itself on a cell-by-cell basis...nothing is better than that. Are you looking for a second layer of protection? It is...

You can test it briefly with a few 12v batteries in series connected to the solar input port. Then once you are satisfied it works, go for a 48v battery of whatever capacity you want. 5kWh server rack batteries are quite popular. At 650W, the Allpowers should pull roughly 13A from a LiFePO4...

The whole LFP-in-UPS is a tough challenge; there are ways to solve it but I haven't seen any "drop-in" solutions. I've got an APC SmartUPS that can -barely- fit inside the case 2 x K2 Energy K2B24V10EB 8s LiFePO4 (so "24v native" rather than series 12v batteries), widely available on the used...

It's 8x8=64sq ft. Even a 5K BTU window unit is 2.5x too big. A DC heat pump is 10x the cost. Spend the $ on more battery.