NoordSolar

Looking for Zketech battery tester owners with a view to compare findings - message me if you have one

For those who have the Svolt blades cells Altergrid now has the brackets and busbars to but it all together very nicely . see https://altergrid.co.za/product/middle-bracket-for-svolt-184ah-cell/

Thanks !

Thanks I emailed them today but no answer , I guess service is not one of their strong points. What does a meter of cupper 20mm cost ?

Where did you get copper bar of that size from?

Is the pipe simply squashed , so its two layers ?

Where did you get this from ?

Altergrid is getting in 280's in the next few days , give them a shout

I think I have found a crowd in Pinetown that will do it

These cells need very little top balancing - they are all within 1% is capacity and initial charge . I would just charge them all in series with your BMS and let the BMS top balance it if you have a BMS with decent balancing current

Been continuing testing these cells and one day after the cold spell it got down to 11 deg in my testroom and capacity therefore measureed 3 AH lower than the previous. HAve now rigged a heater to keep the cells at around 25 deg and the change is remarkable - capacity are all now about spec at around 186-188AH ( to 2.5 V ) rated spec is actually down to 2.0V

Has anyone had busbars made using laser cutting copper?

Regarding busbars , one could use 3 two hole busbars to link two adjacent cells for a 2P battery but am looking to make a busbar like this ( Busy getting a quote from China. for this )

I'm be using the clips and possibly busbars from Altergrid who will be importing them ( expected next month ) . Will stack two packs of 16 on top of each other on a 70cm deep shelf

Thanks well spotted !

Well priced , somehow I cannot bring myself to buying Chinese breakers. CBI do a range now . Struggling to find supplier online

HAve you come across a decently priced DC breaker with a 10 -20 KA+ fault current rating ?

Cycle life cannot really be tested as the test will take years , I doubt its actually tested probably thats the design life. When used for home energy storage calender aging will be the dominant lifetime ending factor and this is strongly dependant on temperature.

The IR is rated at .45 mOhm for 184 AH cell or .81 per 100 AH , The EVE 280AH is 0.25mOhm so 0.7mOhm per 100AH , not far different

I have heard that Altergrid is in the process of ordering a set of brackets and busbars. You can print them your self if you want , STP file provided here http://www.cleverbms.com/list_11/89.html

I have bought 32 cells from Altergrid and have started testing with a Zketech battery capacity tester and a YR1035+ Internal resistance tester. IR are all between 0.48 and 0.52 mohm. Capacity for these cells is rated at 0.33 C from 3.65V to 2.0V I measured from 3.65V at 0.2C down to 2.8V and extrapolated from a single cell that was tested to 2.5V . ( This provided an additional 2.0 AH ) So I measured from 182 -184 AH to an effective 2.5V ( 7 cells tested so far ) . There are very nicely built with a high build quality

increase SOC by fixed amounts - eg 10AH

Thanks, no it does not address that

Just wondering if anyone has the Zketech 40A Cell tester? ( I see Steve87 has ) I'm looking for a way to charge a fixed A/H or time . You can discharge for a fixed duration but not charge it seems

Does anyone know if the SolarMD fuse will fit in a Victron Lynx. Victron Fuses are very expensive at around R500 each , just wondering if the SolarMD ones will fit ( They appear to be the right shape from Photographs I have seen .