solardavid

hi, I have the same inverter as you, have you tried removing the filters on the upper air intakes? Check if the temperature drops in the same conditions. My idea is that the original filters do not let enough air pass to cool the heat sinks. Then try making new filters: I put filters for the kitchen hoods (the black ones with a carbon layer) of the same thickness but with wider mesh, also removing the filter holder and I partially solved the problem by lowering the temperatures by several degrees. (from 65-68 to 52-54) If you want you can also add a 12 x 12 or 92 x 92 fan on one side at the bottom on the side of the inverter in suction (you also need a small duct to distance it from the holes of the inverter output air). I hope I have been of help to you. Good sunshine

Hi Pigo, I have the same operation as you with the inverter and the battery. Once charged to 100% (53.2 volts bulk and float) it starts discharging 1 or 2 A and then charges again. In my house I have another inverter with a self-built 5kwh 24 volt lithium battery bank and I have never noticed this strange operation as my battery bank charges to 100% with 1 full day. It is practically always charging. 100% I lowered the bulk voltage by tricking the inverter and you wanna laugh? He started to drain the battery by a few amps. My idea is that with low-capacity batteries and many solar panels the battery charges immediately and starts discharging. The solution could be to increase the battery capacity to ensure that it almost never reaches 100% but maybe at 90 95 extending the life of the batteries. Unfortunately I only installed 1 pylontech but before spending more money I would like to be sure of my idea. It is not nice to have 4 kw of panels and have the battery in the evening only at 60 - 70% since during the day it continues to discharge. When you mount the other batteries keep us updated on how they will work for the other members of the group as well. Sorry if the post is long but the topics were many and sorry for my English but it is not my first language. Good sun to all SP24 Primo VM IV (PF1) 5.6Kw 48 Volt Pylontech US3000C Batteria LifePo4 3.55Kw 74Aa

thanks for your reply Coulomb .this card gives a lot of users a headache.... Reading on various forums many have had the same problem. In the end, it is only an isolated voltage converter (the ground of the output connectors and the ground of the circuit are separated by a capacitor) with a SC510070JDWE chip converter rs 232 usb nowhere to be found. my idea was to use an arduino 1 board without the microcontroller and take advantage of the usb rs 232 converter on board to communicate with the inverter.I have seen it done somewhere to update the pip firmware and if it worked for him why 'not to use it? There are also simpler converters and maybe even optoisolated but currently the card is in my drawer. Why not try? The only doubt is about the mass of the two circuits (pc and inverter) otherwise why would they have kept them separate on the board?

does anyone know the connections of the CN2 connector of the card such as tx rx +5 volts? it is the second card that I replace and I would like to understand why ...