SPH 6000 Max connected battery capacity

koge19 · May 1, 2022

Hello All,

I have a SPH6000 inverter with pylontech 2xUS3000 batteries. I am considering adding pylontech 2x5000s to the inverter since I notice I am exporting quite a bit of power and I would rather just store it in the batteries.

The SPH6000 mentions a max battery capacity of 3-12kwh(https://www.ginverter.com/Residential-Storage-Inverters/43-594.html , page 59). My question is can I use pylontech 2x3000 + pylontech 2x5000 (effective kwh : 14.4 kwh taking into account actual storage capacity), despite the 14.4 kwh being well above the expected capacity of 3-12kwh.

Any ideas if this will work.
Thanks,
George.

koge19 · May 3, 2022

Sorry, since there are no responses on here, thought I should clarify what I am asking - I know that the recommended rated battery capacity is 3-12kwh, however would 2xUS5000+2x3000 still charge since they are connected in series , or, would the CAN bus detect all connected batteries and trip and fall charging no batteries at all.

shavermcspud · Jul 12, 2022

I have charged 32kWh of LFP cells using pylontech emulations on a seplos BMS so i don't think you will have an issue.

Swaff · Nov 17, 2022

shavermcspud said:
I have charged 32kWh of LFP cells using pylontech emulations on a seplos BMS so i don't think you will have an issue.

Recognise this is an old thread, but it's very relevant to me.

I'm also considering a SPH6000 with a [home brew] 20kWh battery using Seplos BMS but was put off by the published 12kWh limit, which doesn't really make sense to me. I'm less concerned about the ability to recharge the batteries but I do want to be sure that I will be able to make use of the full capacity of my battery - do you foresee an issue?

Do have any idea why Growatt would place a 12kWh limit on the size of battery?

shavermcspud · Nov 17, 2022

Swaff said:
Recognise this is an old thread, but it's very relevant to me.

I'm also considering a SPH6000 with a [home brew] 20kWh battery using Seplos BMS but was put off by the published 12kWh limit, which doesn't really make sense to me. I'm less concerned about the ability to recharge the batteries but I do want to be sure that I will be able to make use of the full capacity of my battery - do you foresee an issue?

Do have any idea why Growatt would place a 12kWh limit on the size of battery?

That limit is only imposed on their own GBL series of batteries due to internal BMS limitations, works fine using seplos BMS

Duckcm18 · Jan 18, 2023

Hi, I'm looking to increase battery capacity as well using a SPH6000. I have a GBLI65332, which is 6.5kWh I understand the internals are just 2xUS2000 Pylontech batteries in an enclosure. Will I be able to connect Pylontech batteries in series to add them or would it have to another GBLI65332? Interestingly the 12kWh limitnon the inverter as mentioned is less than 2 Growatt batteries would produce at 6.5kWh each making 13 kWh. Does that mean the batteries on Growatts own system wouldn't work properly?

Quattrohead · Jan 18, 2023

You can use as much battery as you want, it's just a recommend limit based on maximum charge current of the unit.

Duckcm18 · Jan 18, 2023

Quattrohead said:
You can use as much battery as you want, it's just a recommend limit based on maximum charge current of the unit.

Ah, right thanks. Do you know if the system would accept Pylontech batteries in their native form? Rather than another Growatt unit, if it has to be a Growatt one are all the batteries compatible?

Quattrohead · Jan 18, 2023

You can connect any type of battery, use USE settings and put your charge voltages in as per the battery spec.

shavermcspud · Jan 18, 2023

Duckcm18 said:
Hi, I'm looking to increase battery capacity as well using a SPH6000. I have a GBLI65332, which is 6.5kWh I understand the internals are just 2xUS2000 Pylontech batteries in an enclosure. Will I be able to connect Pylontech batteries in series to add them or would it have to another GBLI65332? Interestingly the 12kWh limitnon the inverter as mentioned is less than 2 Growatt batteries would produce at 6.5kWh each making 13 kWh. Does that mean the batteries on Growatts own system wouldn't work properly?

They are not US2000 inside at all, they don't use the pylon protocol for can comms either. The US2000 are 2.4kWh units with max 95% DOD

shavermcspud · Jan 18, 2023

Quattrohead said:
You can use as much battery as you want, it's just a recommend limit based on maximum charge current of the unit.

Again, you can't, the internal BMS comms link in and out is max 6 units in a string.

Duckcm18 · Jan 18, 2023

shavermcspud said:
They are not US2000 inside at all, they don't use the pylon protocol for can comms either. The US2000 are 2.4kWh units with max 95% DOD

This video shows the enclosure opened up and you can see the batteries inside

Although the enclosure isn't exactly the same as mine, I have LEDs on the front. I thought they'd be the same

Quattrohead · Jan 18, 2023

shavermcspud said:
Again, you can't, the internal BMS comms link in and out is max 6 units in a string

Again you can, as many as you want but no comms, user settings for battery charging parameters.
Don't again me again, ok ?

Duckcm18 · Jan 19, 2023

Quattrohead said:
Again you can, as many as you want but no comms, user settings for battery charging parameters.
Don't again me again, ok ?

When you say no Comms, would something like solar assistant takeover the settings function?

shavermcspud · Jan 19, 2023

Quattrohead said:
Again you can, as many as you want but no comms, user settings for battery charging parameters.
Don't again me again, ok ?

Ok Mr grumpy pants.. But why would you buy the Growatt batteries with closed loop comms only to not use that feature and use the default battery for LA option?

Quattrohead · Jan 19, 2023

I don't know why the OP is doing it, they asked a technical question and I gave a technical answer.

SPH 6000 Max connected battery capacity

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