Recent content by cosmicosmo4

Replacing the 12v lead acid battery with LFP increases the range because it decreases the weight of the vehicle. Adding solar panels, a charge controller, and an additional battery decreases the range because it increases the weight of the vehicle. If range is the goal, you really should...

It is possible to do what you're describing but I doubt 128 cells in series is something you want. First, specify your loads in kWh (and kWh/day), not kW, and size your battery pack based on the kWh you need between recharges. For example, let's say you want to be able to charge your EV fully...

Yes, the 2017 NEC has been adopted by Texas.

I assume your loads are not grid-connected, right? If you use a separate charger and inverter, you can use any smart outlet or even a mechanical outlet timer to charge only in off-peak hours.

@Plecoptera, I would arrange those panels in 2S2P because the charge controller will be less stressed if you use 50% of the voltage rating and 50% of the current rating than to use nearly 100% of the voltage rating and only 25% of the current rating. And that's still only ~11 amps, so the...

Yes, what you are talking about is called a solar generator. Some popular/trustworthy companies that make these items are goalzero, bluetti, and jackery. They come in different sizes, which determines how much power it can output at one time, and how much total energy it can store. To figure...

3000 watts at 12v is 250 amps. The inverter is 90% efficient so that bumps it up to 278 amps. Usually it's prudent to size fuses about 20% larger than your expected max load, or 20% smaller than the safe current for your wiring, whichever is lower. You haven't told us anything about your wiring...

None of that is correct. A starter battery is rated for cranking amps. A deep cycle battery is rated for amp hours. 1200 cranking amps means it can put out 1200 amps * 12 volts = 14,400 watts. But only for a few seconds. Then it needs to be recharged. If you try to run any significant load for...

Ok at first you said 7S10P but now you say 7S80P. Typo in the first post, I guess? 7S80P is 176 Ah, not 1232 Ah. You don't multiply the current/capacity for the number of cells in series, only for the number in parallel. So you have a 24v nominal 176 Ah battery that you may upgrade to 264 Ah in...

Both of those are off-grid systems. Hybrid means that both the grid and batteries are involved.

Generally 39V *is* safe to the touch for unbroken, clean, dry skin. The larger danger is that you accidentally short the panel leads together, leading to a large current passing through metal, which will heat the metal to a temperature that can burn you and damage equipment. By covering the...