Tran Family
New Member
- Joined
- Sep 7, 2021
- Messages
- 12
Hi Will, your 0.2C (~250 watts) discharge test might not be enough to grade this battery. Serious issues here with two of these in parallel using 2000watts GoWise pure sine, or 2200watts Giandel pure sine from your website( plus 3 other highly rated pure sine inverters by other RVers). First i thought there was something wrong with all these inverters because all these new amazon inverters when connected to these two zooms batteries (100 amp BMS each so together they can handle up to 200amp) all can deliver continuous 500 watts for 10 mins or more. I didn't go beyond 10 mins because i thought it was long enough. However, when applied 700 watts then these inverters shut down after 3-5 mins; 1000 watts shut down in 1-2 mins, 1500 watts shut down in 30 - 50 secs .
I did multiple isolation tests including attaching a light directly to the batteries to see if the lights would go out when both BMS shut down. The light never shut down but all the inverters did... even at 700 watts . Weird thing is, even if 1 battery bms shuts down then the other parallel should be able to handle 700 watts (~ 65amp) but that is not the case ... all inverters shut down after 3-5 mins with the lights still on without a slightest flicker. my DC amp meter and volt reading (12.4v constant) were always attached and monitored. No shore power.
so i swapped to 2 lead batteries and ran the same tests. All the inverters powered through no problem even with fluctuating voltage from 12.7V start to 10.8V. The lead batteries boiled my 1000w 1L electric kettle, ran 1500w heat gun full power (though not as strong) without shutting down once. please help. I don't know what else to do other than asking you and contacting Zooms for support. thank you Will.
I did multiple isolation tests including attaching a light directly to the batteries to see if the lights would go out when both BMS shut down. The light never shut down but all the inverters did... even at 700 watts . Weird thing is, even if 1 battery bms shuts down then the other parallel should be able to handle 700 watts (~ 65amp) but that is not the case ... all inverters shut down after 3-5 mins with the lights still on without a slightest flicker. my DC amp meter and volt reading (12.4v constant) were always attached and monitored. No shore power.
so i swapped to 2 lead batteries and ran the same tests. All the inverters powered through no problem even with fluctuating voltage from 12.7V start to 10.8V. The lead batteries boiled my 1000w 1L electric kettle, ran 1500w heat gun full power (though not as strong) without shutting down once. please help. I don't know what else to do other than asking you and contacting Zooms for support. thank you Will.
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