Recent content by AntronX

Yes it's certainly nice when it works just as predicted. I got this circuit idea from the creator of MiniBMS a while back at diyelectriccar forum. I changed component values and simulated it to make it work just how I wanted. For higher amperage and less balanced cells I may have to re-design it...

Short what to ground? Worst that can happen is transistor getting stuck on and discharging cell to zero unless caught in time.

From looking at those 2 bills it appears annual usage is 91,000 kWh. I looked at OPs roof and it looks like at least 84 * 400w panels will fit but in various orientations for 34kW total, maybe more. According to PVwatts that's 65,000 kWh/year in LV or 71% of annual usage. I would go for maximum...

Worked on first try. Helps that this was LTSpice tested design I made 10 years ago. After 10 minutes at 3.6V 0.42A transistor was at 75°C and resistors at 90°C. Now I need to make 15 more of them. Will have to use reflow oven soldering. Idle consumption 0.8mA at 3.3V and 5mA at 3.4V. Shunting...

It's a big house with a pool. If you count per square foot then usage is reasonable.

Maybe they can get them offgrid like in Australia.

Generator is a good point. Would not want to live next door to one. But exactly how much power they consider enough for winter can get murky and they can set the bar artificially high.

Try leaving small load on grid like a cable modem/router and a UPS.

What model MPPT ?

What are they powering? Could be inductive kickback.

Power company in Las Vegas (NV Energy) still offers 1:1 net metering so now is a good time to jump into solar and get grandfathered for 20 years and not worry about batteries.

Sure as long as it comes with right to disconnect and not pay fixed fee.

Simple voltage shunt circuit to balance LFP cells. R8 and R9 sets shunting threshold to 3.45V and placed away from heat generating parts to reduce voltage drift. Shunting current should be around 0.38A should be enough to keep 100A cells in balance. Single sided PCB no holes or vias, easy to...

Start with cellmapper.net to find nearest cell towers for your provider. Then use link.ui.com to estimate if you can reach the tower from your height/location. A lot of this stuff I knew from years of experience in amateur radio.

Not worth buying junk panels at 10 cents/watt when nearly 2x efficient and ~3x power output panels can be had for 25 cents/W. Installation and space requirements become not worth the trouble unless you lay them flat on the ground and don't care what happens to them. I realized it when looking at...