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Old 02-17-2020, 04:04 PM   #1
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Additional Lithium battery

Any rules or considerations about adding additional lithium batteries?
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Old 02-17-2020, 04:07 PM   #2
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It would help if we had more details about your existing setup (batteries, converter, inverter, solar etc).
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Old 02-17-2020, 04:13 PM   #3
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I have a xantrex 458 inverter 1000, a 210 amp lithium 90 days old, has BMS LFPo, works great, but was considering adding another 100 amh unit. Just wondering if there are any matching problems,
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Old 02-17-2020, 04:16 PM   #4
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Additional lithium or additional to lead acid?
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Old 02-17-2020, 04:17 PM   #5
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Lithium
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Old 02-17-2020, 05:03 PM   #6
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You can tie another one in, in parallel.
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Old 02-19-2020, 09:05 AM   #7
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Yes as ^^ said, parallel to the existing. Make sure the old and new are the same type of lithium and have the same voltage, per specs.
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Old 02-20-2020, 11:54 PM   #8
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Quote:
Originally Posted by Chuck Q View Post
Any rules or considerations about adding additional lithium batteries?
I'm assuming we are talking the modern "drop-in" type. If so, the simple answer is no rules or considerations. As others noted, match them and you are good to go. No issues with charging or loading them. They will share the load current and available charge current nicely. Even if the original has some miles on it you will be fine. You could also parallel a 100 and a 200 AH pair if they are similar internally (same manufacturer and model line).

Ideally you will have a monitor on each one though that is not essential at all.
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Old 05-04-2020, 08:43 AM   #9
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We have 4 in series for s 48 V nominal system. 48 V nominal seems to be standard for larger battery suites. Electricity is 90 V From panels
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Old 05-04-2020, 03:22 PM   #10
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I installed four 100 amp-hour BattleBorn LiFePO4 batteries when I bought the trailer. I needed three to support my inverter surge capacity but had room for the fourth.

With 4 in parallel it can handle a thirty second 800 amp surge. No problem running any 120 volt device on my trailer with my Spartan 2200 pure sine wave inverter.

My 4 batteries are lined up end to end behind my sit and sleep sofa. If I lined them up side to side I think I could fit a total of six of them in there.

It would be mostly useful for extending the amount of air conditioning I could run after the sun goes done. It is usually cool enough be 7PM that my existing setup does fine.

My solar setup can be as much as 2040 watts which gives me a lot of charging potential. 1440 watts on trailer roof, 300 watts on portable array, 300 watts on truck's camper shell which can be plugged into trailer system with 4 AWG power power cable.
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