โDec-02-2019 08:00 AM
โDec-06-2019 05:46 PM
LittleBill wrote:At the time, I was leaning towards the 100ah Renogy because it was on sale for $640 ($800 now). The 100ah Battle Born (BB) was/is $950.
is there a reason a battle born is simply not purchased?
โDec-04-2019 03:31 PM
โDec-04-2019 01:28 PM
BFL13 wrote:I have read posts that state the Panasonic will draw down in the 500w to 800w range when lower power is selected.time2roll wrote:BFL13 wrote:I would not buy any inverter over 1000w to be connected to lithium battery of 100 amp max current. Probably 800w max inverter for best results.
...... and we are ok with the 2000w PSW inverter we have now. Newer MWs will run on MSW (BTDT), but not this 1991 job.
I realize you have more battery but we are talking about a current limited lithium battery.
My point was that AFAIK there is not any MW small enough for that, where a 700w is already 1050w for input.
So Li does not change the basics same as Wet or AGM that you need more than 100AH if you want to run a MW unless there is a smaller size Panasonic inverter type you can run at half power maybe.
โDec-04-2019 01:26 PM
Itinerant1 wrote:
For what it's worth...
https://www.ev-power.eu/blog/LiFePO4/LFP-as-starting-battery.html
From that link...
LFP as a starting battery โ two concerns
Question: I want to use the LFP battery (4x 3.2V cells) for starting of my car. What SBM (simple battery management board) should I use to protect the battery?
You cannot use a SBM to protect the starting battery. For starting the car, the current will be very high, hundreds or even nearly 1000 Amps, it is not possible to disconnect such high currents.
WARNING: Additionally it is not possible to disconnect the battery from vehicle circuits. The car electronics may burn or become faulty of the battery is suddenly removed from the circuit, as a result of disconnection, during the operation (when the engine is running).
To install LFP battery, the battery must be hard wired to the car, the same way as the lead acid battery is. This brings some risks and problems:
1) No disconnection, no fuse. Note that the car battery is wired without any fuse or disconnection ! ! ! This is a huge risk that exists in all cars. It is crazy, but this is the reality. Yes, this is the most crazy thing about all cars you see in the streets โ no high power fusing or disconnection of the 12V battery. This is also one of the main reasons for the many car fires โ the fire starts from short circuit on the battery that cannot be disconnected from the carโฆโฆ so the car will burn completely.
There is less of a issue with the Lead Acid battery, as the Lead Acid battery can give the power for a short time, and it will stat loosing the peak power rating, after longer time of high current discharge.
However for LFP battery, in case of short circuit, the battery will release all power suddenly, constantly and continuously. The LFP battery has much more power that the lead acid battery.
ADVICE: Our definite suggestion is to install a high-power rating fuse for the LFP battery. The rating of the fuse should be 300Amp or even more depending on the starting currents for your application.
2) Deep discharge. If you left your car for long time without care, the on-board electronics (e.g. alarm, security systems, car radio, etcโฆ.) will drain the battery to completely empty โ the deep discharge. In some cars the battery will be depleted as quickly as in two weeks.
This is a lesser issue for the Lead Acid battery, as most Lead Acid batteries can survive the deep discharge. They can be recharged and they will perform in a reasonable way again. However this is not possible with the LFP battery. If you deep discharge the LFP battery, it is damaged for ever and there is no way to restore it to function.
ADVICE: Our suggestion is that the LFP battery should be fully disconnected from the car in case you park the car and the car will not be used for a longer period of time.
โDec-04-2019 12:02 PM
time2roll wrote:BFL13 wrote:I would not buy any inverter over 1000w to be connected to lithium battery of 100 amp max current. Probably 800w max inverter for best results.
...... and we are ok with the 2000w PSW inverter we have now. Newer MWs will run on MSW (BTDT), but not this 1991 job.
I realize you have more battery but we are talking about a current limited lithium battery.
โDec-04-2019 11:21 AM
BFL13 wrote:I would not buy any inverter over 1000w to be connected to lithium battery of 100 amp max current. Probably 800w max inverter for best results.
...... and we are ok with the 2000w PSW inverter we have now. Newer MWs will run on MSW (BTDT), but not this 1991 job.
โDec-04-2019 11:07 AM
โDec-04-2019 10:16 AM
time2roll wrote:BFL13 wrote:You need a Panasonic 'inverter' microwave.time2roll wrote:
I don't think a microwave has much surge at the start. s/b easy to stay under 100 amps. Only real surge in an RV would be an air conditioner and that is not really a concern if you are limited to one battery.
A "700w" Danby MW we had wanted 1050w input and made the 1000w PSW inverter pull 100 amps as seen on the Trimetric. The inverter showed its overload light but kept running. After a few times doing that, the inverter burnt out some components on its circuit board.
Set to low power these actually draw less current instead of cycling the megatron.
โDec-04-2019 10:03 AM
BFL13 wrote:You need a Panasonic 'inverter' microwave.time2roll wrote:
I don't think a microwave has much surge at the start. s/b easy to stay under 100 amps. Only real surge in an RV would be an air conditioner and that is not really a concern if you are limited to one battery.
A "700w" Danby MW we had wanted 1050w input and made the 1000w PSW inverter pull 100 amps as seen on the Trimetric. The inverter showed its overload light but kept running. After a few times doing that, the inverter burnt out some components on its circuit board.
โDec-04-2019 09:55 AM
โDec-02-2019 03:52 PM
โDec-02-2019 03:43 PM
โDec-02-2019 03:18 PM
time2roll wrote:
I don't think a microwave has much surge at the start. s/b easy to stay under 100 amps. Only real surge in an RV would be an air conditioner and that is not really a concern if you are limited to one battery.
โDec-02-2019 02:38 PM