battery

battery

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  1. H

    Charging 12v Battery with Solar Panel?

    I use a small 12v 1.5w Solar Panel to charge my engine battery, quite often it's not powerful enough and the battery loses charge. If I buy a bigger one say 30w, would that still trickle charge (albeit faster) it, or would it damage it? TIA
  2. s#loxy

    which charger for Sealed Lead Acid Battery 12V 7.0Ah?

    I'm planning on buying 12V 7.0 lead acid battery (item 38315 from Screwfix) to power a small water pump(Seaflo 12V 1.2 GPM 35 PSI Water Pressure Diaphragm Pump). I've searched a bit for which charger to charge up battery but was hoping someone would point me to an affordable option or tell me...
  3. D

    How to measure battery bank energy?

    Does monitor on a bank measure true watt hours if the batts have different state of charge?
  4. D

    Watt hour means what?

    What does Wh indicate in a battery monitor?
  5. David1977m

    Help picking a new SDS battery drill - Day 3

    Good morning I'm after a new battery operated SDS drill. I currently have a Bosch SDS hammer drill 240v that I bought 10-15 years ago for home use, however after being in Electrical vehicle engineering, I'm now doing L3 Electrical Installation and realised I'm going to need a battery SDS. I...
  6. S

    At what voltage should a 1.5V battery be replaced?

    Hello, I used two 1.5v batteries for the remote AC. (AAA/R03P/1.5V) and Its expiration time is 03.2025. The battery is weak, and the air conditioner cannot be turned on. I replaced it with two new batteries and the problem was solved. I measured the voltage of both batteries. They are 1.54...
  7. RicksMule

    How to wire a C/B into a dual battery set up

    QUESTION: How to wire the C/B into this current dual battery set up. EXISTING SITUATION: MAIN Battery is OEM and feeds OEM circuits. Added an AUX Battery in the OEM dual battery location. Connected the AUX - terminal to the MAIN - terminal. Connected the 100A Accessory Fuse Block power cable to...
  8. Retroelectric

    UK Solar and Battery Sign Off

    Hi If a new build has solar and battery fitted, but no paperwork or sign off has been completed, what are the implications? Do you need a mcs cert for BC sign off like Part P for an install?
  9. K

    Can I charge my caravan battery from my car alternator with a DC to DC while idling?

    Can I charge my caravan battery from my car alternator with a DC to DC while idling?
  10. B

    UK Advice needed on narrow boat battery charging circuits please.

    I've been asked by a keen DIYer friend to to advise on how to wire his boat batteries when he has three potential inputs. 1. Shore mains feed 2. Boat engine 3. Two solar panels. I've drawn what I think would work but it's not my field, so advice would be appreciated. I've advised him to get a...
  11. X

    Bad starter motor or bad battery or something else? Help!

    Hello I have issues starting my car after having the key in the accessory position for about an hour or so. Radio off. The first crank of the starter becomes very slow and almost doesn't crank. I hooked a meter inline with the battery, there's 2.2 amps being used when the key is in the...
  12. S

    Led strip lights & 12v battery

    Hi all, I have a couple of questions I'm hoping you can help with. I have put a solar panel on my kids play house which charges a 12v battery. I have so far wired 3 lights and everything works great. I wanted to add an LED strip light in the understanding that they only require 12v. I bought...
  13. D

    Wiring a light and a battery pack, basic questions

    Hello Complete lack of electrical knowledge here. I sew actually, making a costume right now that I need a little light for. So my question is this: Is the sequance of "battery pack -> negative wire coming out of the battery pack -> wire nut -> negative wire coming out of the light -> light ->...
  14. N

    Battery and Inverter installation

    Hi folks, I have recently had a 5kW Solis inverter and 15kW/hr of batteries installed. Everything is working fine, but I have some concerns about the quality of the install: I wasn't given any documentation, so no "part P" documentation. Around three metres of new meter tails were added -...
  15. subiram

    Self test emergency

    I tested a self test emergency lighting with three gears .While testing 2 of the gear doesn't passed 3 hour test but 1 Did Wit the same battery ?Why?
  16. J

    Car battery losing its charge

    Good afternoon, I have a 2 year old car battery (AGM 760 CCA) in a 2022 Hyundai that constantly "seems" to lose its charge. I'll check the battery during the day and, as an example, it will show 40% charge (12.2 volts). I put the trickle charger on it, and within about 15-20 minutes, the...
  17. A

    Recommendation for series connected lead acid battery

    I will be putting together 2 x 12v lead acid battery connected in series (24v basically) backup power for Internet connectivity (routers/wifi etc) Looking for recommendation on best way to keep these battery charged for a series connected battery. There's a lot of 12v battery chargers out...
  18. K

    Block schematic of Solar PV and battery

    I am a Napit registered electrician and want to get into Solar PV and battery storage. I have boot camp booked in April but am not hearing good reports of the outcome of this training. In the meantime I want to do as much research as possible so want to review the elements that go to make a...
  19. W

    PV panels and battery storage

    Hi all - just a quick post to say thanks for this excellent resource and to ask a quick question! PV Panels and battery storage - is there any yearly checks that need to be carried out?
  20. MichaelCassidy

    LifePo4 addition to boat battery bank question

    Hi, advice please if this would be fine and not cause issues with either the batteries or the inverter. I have read that LifePo4 batteries aren't compatible with older alternators. So is this workaround ok? - Leave existing leisure batteries as they are (2 x 100 AH) connected parallel, charged...

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