Recent content by CătăDR

Every time it failed the batteries were charged up and there was a minimum load on the inverter (around 150w). It happened only during summer

I have Solar assistant installed and i can see on the temperature graph a spike every time the load suddenly drops below 200w (eg. from 2000w) and the cooling fans go to idle

The battery and the inverter are connected via a CAN cable so the charging voltage and all other battery parameters are controlled by the battery bms. I can’t change anything. After the temperatures dropped in August didn’t have any problems

I’m still trying to figure out a solution on how to add extra cooling to the unit

Yes, the problem is that the cooling fans are programmed to run at full speed only over 200w load and if you have a big load running witch generates a lot of heat in the inverter and then the load gets under 200w the fans go to minimum speed and due to thermal inertia the mosfets get...

that’s why I’m trying to see where the problem Comes from, because I installed the inverter and panels in October last year and had no problems until June. I’ve made a separate ground for the panels just to see how is going.

I do

‘Low bus voltage’ and ‘bus soft start failed’ but only after the mosfets are fried

It has but as long as the battery is communicating with the inverter it controls the charging current

The problem is that the max charging current is controlled by the battery bms and I cannot charge it

During the last 10 days the maximum charge current was 44.9 amps and it keeps burning the Mosfets from the DC-DC converter and DC-AC inverter

It usually fries them After the batteries are at 100% and it is not load dependent. It happened during the day in the afternoon a couple of times and one time at night when there was no significant load. Max charge current is 100amps and it is controlled by the battery bms but it never gets to...

I have 12 x 455w 2P 6S panels and two LiFePo Pytes batteries 5.12kwh each and I’m trying to investigate why it keeps frying the mosfets (4 times in 3 months)

Hi all, how does this bus voltage graph of a SPF5000ES look to you guys? Thanks

Panels are 2p 6s voc297vdc