Recent content by ejfluhr

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...