jct

Translate from Ukrainian to English (Google Translate): "Have you sent a file on request? did you update remotely?"

Translate from Ukrainian to English (Google Translate): "Have you sent a file on request? did you update remotely?"

I am using a powder coated metal box made for the cells and bms. BMS I will be testing is the JK energy storage bms with screen and ports (JK-PB1A16S10P). I am planning to build myself a "power wall" but need more time for that. Will have 44kw after adding this 14kw to my current setup. The rest will go to the people which cannot really afford solar and to maybe another golf cart in a wildlife estate.
 
Will have to order the next batch soon, might go for EVE or CATL again.

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.

Two things:
1) Try to shift as much electrical work as you can into the daytime hours. At my home, for EG, the pool pump runs only during the day, dishwasher only runs in the morning, water heating is early morning and then midday. Generally we try to use very little after 5pm. These are our own rules, sometimes enforced by timers (EG pool pump). We do this to reduce the load on the battery after hours, thus extending the protection it can give us. Remember that your system is weakest in the morning, and a combination of early morning outage and overcast weather will be its toughest test. I usually have about 55% of the battery available after the early morning water heating (heat pump, so faster and lower consumption than an element).

2) Following on from (1), decide for yourself a minimum level of battery you MUST have at all times whilst there is grid power. In my case this is set at 40%. I will always have 40% at least in the battery when the grid goes down. If SOC reaches 40% and the grid is up, the system will pull from the grid instead and leave that 40% there. So in the worst case scenario I describe above, I will always have a useable 30% in the battery to power the essential circuits until the sun comes out or the grid comes back on.

Saving money on your bills is important. Solar isn't cheap, and you need to see some return on your investment. But we need security too.