Small battery bank/inverter as buffer?

[Iceni John]

I have a question about the house bank. Lately I have been learning about house banks that DIY'ers are creating for their home, that they compare to the Tesla house pack. Made from Lithium Batteries from abandoned laptop cells and the like.  These can be created to any size. Would creating such a pack to use in RV conversion be advisable?  Would it be less than, equal to, or greater than using traditional deep cycle 12 or 6 volt setups?


Kenneth

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Technomadia (Chris and Cherie) have a lithium ion battery bank in their bus that you may want to read about:  http://www.technomadia.com/lithium/

John

[Debo]

I'm with Bruce and Buswarrior on this one. My system is exactly as they're describing, and it works flawlessly. Here's what I've got:

24 volt, 4000 watt Magnum Hybrid Inverter/Charger with remote
4 - six-volt  golf cart batteries
A Champion 3100 inverter/generator

From that, I can get power:

- From shore power
- From the generator
- From the 50DN bus alternator
- From the battery bank

The inverter/charger charges the batteries and provides 120 volt power when I'm plugged in to shore power, and I can limit the amount it'll take from shore power. Over Thanksgiving, I ran off of a single 15 amp extension cord using load sharing while parked in a family member's driveway. When shore power isn't available, I use the genny. When I'm rolling down the road, the inverter gets it's power from the battery bank (via the alternator). When parked, I can run a 15k BTU A/C for about 30 minutes before my battery power is at 50% (which is where I stop.) This is an over-simplification of the system, but to answer your question, yes. It can be done and it works well. The key, as others have stated, is the load-sharing inverter.

[Scott & Heather]

Wonderful. Ok this is precisely the info I was looking for. I'll be shopping soon. This is going to make our lives so much easier. Tom, I can assure you a small diesel liquid cooled genny is on the bucket list, but I have the hondas and can get 21 hours on 3 gal of fuel per unit right now and no one can hear them. Obviously they are inferior to a good diesel genny but it's what I have and the power is super clean inverter power. The wave is actually cleaner than utility power


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[TomC]

The Honda 3000 is just about the best gasoline gensets you can buy. But-still not Diesel. Hope you work out the bugs in your system. Good Luck, TomC

[Scott & Heather]

Tom, mine have over 2000 hours on them and are still humming along.


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[buswarrior]

Don't be in a hurry to change your system?

The local TV mobile units have been using the little Hondas for decades.

Run continuously for years, just fuel 'em and change the oil now and then.

Could they do something more sophisticated? Sure, but why bother?

Very difficult to kill them.

I only bought myself the Yamaha because it was at a price I couldn't refuse.

And Blue is calming?

happy coaching!
buswarrior

[Scott & Heather]

I agree. These little hondas have been workhorses


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