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Lithium batteries and microwave use

12thgenusa
Explorer
Explorer
I am considering replacing four GC2 batteries with two 100 Ah LiFePo batteries with 100 Amp BMS each. My concern is whether they will be able to operate the microwave for light duty use (5-6 minutes) without voltage sag causing problems. The draw for the microwave is about 125 to 130 amps, depending on how much solar is coming in. The wiring is appropriately sized for the loads.

I currently have four GC2s for this reason, not because I really need that much storage capacity. The LAs have served well; they are going into their 12th season and still have very good hydrometer readings. However, I know their time left is limited.

Does anyone have experience operating the microwave with 200 Ah of lithium?


2007 Tundra DC 4X4 5.7, Alcan custom rear springs, 2009 Cougar 245RKS, 370 watts ET solar, Victron BMV-712, Victron SmartSolar 100/30, 200AH LiP04 bank, ProWatt 2000.
15 REPLIES 15

pianotuna
Nomad II
Nomad II
12thgenusa,

So long as the Li are wired in a balanced manner, there should be no issue.

I'd wait until the existing bank dies. Prices continue to drop.
Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.