# Solar Battery output/discharge rate

vienly
Forumite

180 Posts

**Forumite**
Can someone who is familiar with Givenergy answer this question please?

If I understand correctly Givenergy Giv-Bat 5.2kwh has a discharge rate of 3kWh (51.2v x 60A = 3kWh)

If I have 2 Givenergy Giv-Bat 5.2kwh paired, would the output/discharge rate be doubled to 6kWh, or it doesn't work like that?

Reading the Givenergy spec sheet I can't seem to see it.

I've been quoted both Solaredge and Givenergy, Solaredge has a higher battery discharge rate than Givenergy.

Givenergy seems to be significantly cheaper than Solaredge but I have read positive things with Givenergy so can't quite decide yet.

Having an EV charger, and Air conditioning system at home I would assume I need the higher battery/inverter discharge rate.

Thanks

If I understand correctly Givenergy Giv-Bat 5.2kwh has a discharge rate of 3kWh (51.2v x 60A = 3kWh)

If I have 2 Givenergy Giv-Bat 5.2kwh paired, would the output/discharge rate be doubled to 6kWh, or it doesn't work like that?

Reading the Givenergy spec sheet I can't seem to see it.

I've been quoted both Solaredge and Givenergy, Solaredge has a higher battery discharge rate than Givenergy.

Givenergy seems to be significantly cheaper than Solaredge but I have read positive things with Givenergy so can't quite decide yet.

Having an EV charger, and Air conditioning system at home I would assume I need the higher battery/inverter discharge rate.

Thanks

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## Replies

ForumiteForumiteThe Giv-HY 5.0 inverter is capable of 6500W DC power, I assume it's Battery DC to Inverter DC to Consumer unit AC.

Giv-Bat 5.2kwh is only capable of 3000W.

Even if Giv-HY 5.0 inverter is capable of 6500W DC power, it still won't pull that much if there are 2 batterys?

ForumiteIf the battery is limited to a max of 3000W discharge this will then be the limiting factor. So with two inverters and two batteries ( one coupled to each) maximum theoretical discharge will be 6kW (6000W).

ForumiteWould the batterys run at full discharge capacity rate, so if there were 2 x Giv-Bat 5.2kwh both discharging at 3kwh to the inverter, would the Giv-HY 5.0 inverter be receiving a combined total of 5kWh from both batteries?

If it isn't the case, bit confused to why the batteries would discharge at half the capacity if there are 2 batterys.

ForumiteMax DC Power 6500W (incoming from battery and solar PV)

The inverter it's max AC discharge rate is 5000W (Nominal AC Output Power):

https://www.givenergy.co.uk/pdf/Version 2.0/Hybrid Inverter.pdf

ForumiteSomeone else might be able to confirm as my dual inverter and batteries haven't been installed yet.

ForumiteNormally battery discharge above 1C will significantly affect capacity.

1C is roughly your battery capacity discharged in an hour and most manufacturers limit current to prevent disharge above 1C. This reduces customers getting disappointed due to reduced capacity and higher installation costs.

Adding two batteries will only provide increased capacity and not increased output, which is dependent on your inverter capacity.

Givenergy AC coupled is limited to 3.5KWh or 3000VA continuous. hybrid inverters seems to have higher continous rating 5000VA. Might want to look into the larger inverter if you are planning to run multiple inductive loads.

“Don't raise your voice, improve your argument."- Desmond TutuSystem 1- 14 x 250W SunModule SW + Enphase ME215 microinverters (July 2015)System 2- 20 x 330W Jinko Panels + Enphase IQ7+ microinverters (Jan 2022) + Givenergy AC Coupled inverter + 2 * 8.2KWh Battery (May 2022) + Mitsubishi 7.1 KW and 2* Daikin 2.5 KW A2A Heat Pump