Recent content by Mcgivor

The existing AC chrged could be fed after the rectification with 240 VDC from the PV, there would need to be some form of regulation to avoid over voltage conditions. Working with oddball equipment can be challenging due to lack of off the shelf components, there is always a solution with...

The UPS would have a charger, assuming maximum charging voltage is 230.4V (14.4 per 12V nominal ) that would be slightly high for 60 cells, 67 cells using 230.4V would charge to a maximum 3.44 volts per cell.

Use 60 LFP cells of desired capacity in series with a 60S BMS ?

My experience with NIFE is extensive in railway signaling applications, some had been in service for over 30 years with electrolyte replacement every 3 years, despite that they wouldn't be my first choice, they are too inefficient in my opinion. Current technology such as LiFePo4 is far...

NIFE are extremely robust, long lasting at the expense of being inefficient, compared to other chemistries, including LA, they can be refreshed with anelectrolyte change and last for decades. There is equipment which can be programmed to accommodate their requirements, see above, they never...

There is equipment that can work with NIFE battery banks, they have custom settings which allow for the large voltage swings, they do however tend to be more costly, furthermore there are inverters which can interact with the grid programmable to incorporate various functions including AC...

Automotive alternators are designed to recharge a healthy lead acid battery briefly after starting along with being able to support the lighting, ventilation and other loads applicable to the vehicles operation. Whilst it is possible to charge auxillary batteries it will reduce the alternators...

Overcurrent protection is specifically sized to protect the conductors, not the devices connected, therefore use the appropriate fuse as specified on the modules, it's to protect the attached conductors. Any overcurrent should be sized to protect the minimum gauge utilized within a given...

As it appears there is a generator available, my suggestion would be to measure the kWh requirements with a recording device to establish a baseline of the energy required for the intended usage. Attempting to guesstimate using specifications is difficult due to unknown duty cycles of the...

Yes, I haven't been on NAWS forum in a while, seemed to become stagnated on lead acid with LFP being referred to as not suitable for DIY, here its the other way around and since I would never consider LA again this environment is more suitable.

Measure the voltage drop across the cables of each battery independently with a fixed load, that will determine if the cables are within close proximity to one another, measuring resistance without load is not dynamic, current draw will reveal any high resistance terminations.

The SCC takes it power from the battery, personally I use a disconnect to isolate so a spark, if any, would not be seen. What are you referring to, a small spark or large, a SCC is considered an extremely light load but a load none the less, so a small spark may be possible.

Did you by any chance have an inverter connected? Even turned off the capacitors will cause a spark on initial connection.

My first build was a 4P 8S pack with 100Ah cells , it's been in service for 3 years without any problems, the cell blocks remain in ballance even when fully charged, which is not done on a regular basis, normally a lower value is used, ~90%, initially top ballanced. Whilst I understand the...

The answer depends on the controller being used, with PWM 12V nominal panels would be required, MPPT on the other hand needs higher voltage so 24V nominal panels would be used.