P1000

My guess is that the slave battery is not balanced, and disconnects on cell ovp, then the master battery reaches all conditions for full pack reset (>55.2V and <2000mA). It will likely sort itself out over the course of a couple of weeks, if it does not, you might have to replace a cell. As a side-note: that battery temperature is way too high!

It's 500mAh. 14500 would be the size of the cell, 14mm diameter, 50mm long.

Unfortunately, pretty much all the BMSs require the battery to be charged to balance the cells, so if you don't charge to 100%, you are reducing the battery life.

R20k is still a lot cheaper than a new 8kW.

Seems to be a recurring theme with parallel Deye/Sunsynks.

The charge voltage is set by the BMS. The voltage that the BMS sets is regulated at the inverter, so naturally it will be lower at the battery when charging.

Yeah, the fact that the battery voltage is 54.3 probably means the inverter is outputting 55V, so it is limiting the voltage.

It's because the BSL's BMS sets a relatively low voltage for charging (55V), so the current will quickly taper off when the batteries go over 50-60%.

There should be a check valve and an anti-syphon loop. If you are losing that much temperature through the night, you definitely need to replace the one way valve and you likely don't have an anti-syphon loop. Fix those things and then check if you need insulation.

The COP for this heat pump is 12, according to the specs (under the specified conditions - most notably the ambient temperature is higher than the pool temperature).

Yeah, so the heatpump output is only 14.5kW under very specific conditions - like the outside temperature has to be higher than the pool temperature. In winter its output can drop down to 2.8kW. So to answer your question: At least 3 months or so.

Don't waste your time arguing with this guy. NoJ was previously Erastus, who left the forum because people could not understand what he was trying to say, and he could not understand what people were saying to him.

Not semiconductors, ceramics. Also not more efficient than resistive heating, because they are still resistive heaters, just not a fixed resistance - the resistance goes up with temperature (PTC = positive temperature coefficient). Off course, the nichrome used in regular heaters technically are also PTC, but with a very, very low coefficient.

A squirrel cage induction motor will take a certain amount of current to start - and that is dictated by the design. The time it takes that current can vary by load.

That will definitely be the case when power comes back after load shedding (for any inverter that complies to NRS).

It's in the SSEG requirements, section 3.1 https://resource.capetown.gov.za/documentcentre/Documents/Procedures, guidelines and regulations/Requirements for Small-Scale Embedded Generation.pdf

The insulation is so thick to protect you from the red-hot aluminium...

IIRC, there were 4 different Eskom Philips bulbs, 2x of them MR16 (12V) and 2x GU10, both of which I remember having only a single LED. All of them that have failed (of both GU10 types) were because the LED chip cracked, some would flash as they heated up and lost connection. Off course, you also get garbage of the multi-led types, but at least the LED temperature is lower as it's spread over a larger area. With most of these cause of death is usually a failed capacitor. https://web.archive.org/web/20140907002122/http://www.karebostore.co.za/

Looking at that graph, it seems like you are exporting, and as most meters are configured, you will be paying for that export the same as import. The fact that the grid power is measuring 0 means something is mis-configured/wired incorrectly.

They will start failing after about 3000 hours of operation. I have replaced many of them, the cheap ones with multiple small LEDs last longer.

A primary battery is a non-rechargeable type.

Yes, on the same technology, lower Rds means bigger die, means more gate area means more gate capacitance. But technology is continuously evolving and you now get devices with much lower Rds on for the same gate capacitance than you did 10 years ago. When you move to SiCFETs, the gate capacitance falls significantly (as does the area required for a given current capacity).

That is the correct interpretation of SANS 10142, and how it should be done anywhere in the country for a valid CoC to be issued. Just make sure your fast changeover is also compliant - I'm not aware of one that is compliant and cost effective. (They cost more than the difference between a NRS097 certified inverter and an "off-grid" inverter.)

Install a hager RCD and a proper surge arrestor on the incoming mains (before inverter) and remove all surge arrestor plugs/devices after the inverter.

Don't export unless you have a contract to do so. If you don't, you will be billed for export. The only meters that will turn backwards by default is old mechanical meters without a ratchet, but even if you have one, exporting is still against the law.