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Solar Array Control With Photocell

As the Amazon link title states, that's a DC NPN 4 Wire NC NO Nomal Close / Open Photoelectric Sensor with a sensing range 10 - 30 cm. These are used to detect presence or absence of parts in ...
Transistor's user avatar
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0 votes

I am trying to DIY outdoor gazebo solar lights

It will be very complicated to make the system work with the parts you have already chosen. If you look around there are many cheap kits from china for exactly this purpose. You don't need to buy ...
Drew's user avatar
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1 vote

Is off grid solar setup limited by battery charging current?

You are limited by the charge rate of a lead-acid battery: somewhere between 10% and 30% of capacity it typical, but really, 10% is just about the absolute minimum, used when you don't have any ...
david's user avatar
  • 4,533
5 votes

Are 96V lead acid batteries a thing?

We used to manufacture and supply a "120V" DC charging system, which could also be used with 96V and 56V systems. We no longer do so because of the cost of 3rd-party laboratory certification,...
david's user avatar
  • 4,533
5 votes

Are 96V lead acid batteries a thing?

125 VDC nominal battery systems (60 cells × about 2.1 V/cell open-circuit) are common in substation switchgear environments and 125 VDC is a standard control power voltage for switchgear circuit ...
Theodore's user avatar
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12 votes

Are 96V lead acid batteries a thing?

There's little point in making 96 or 192 V batteries available. Too high for safety, too low for efficiency. Its marketing niche does not exist. 48 V is low enough to be 'touch safe' for most ...
Neil_UK's user avatar
  • 168k
8 votes

Are 96V lead acid batteries a thing?

do engineers make use of large 96V lead acid batteries? What about 192V batteries. Do they exist? If not, why? Short answer: yes, they exist, although they are rare. Typically they are found in the ...
Fabio Barone's user avatar
  • 4,254
17 votes

Are 96V lead acid batteries a thing?

48V and lower is considered safe. Which means the regulatory and compliance is relaxed. At 96V and above, certification would be required in most countries. This slows down wide-spread adoption for ...
MOSFET's user avatar
  • 4,035
1 vote

Charge EV from array of small solar panels DC/AC

The most promising way so far in terms of price and yield I reckon is to use an inverter to mimic a granny lead. So I have found a cheap 36V (DC) -> 240V (AC) inverter claiming to yield a pure sine ...
jac's user avatar
  • 31
0 votes

What size DC circuit breaker to buy for a 12 V, 80 W solar panel?

Shorting a solar panel does it no harm, and the normal operating current in full sun is perhaps 90% of the short circuit current. Wire and circuitry that can handle the normal current should thus be ...
John Doty's user avatar
  • 4,532
0 votes

Relay Switching On and Off Rapidly During High Current Draw

I posted an answer previously that involved adding a battery, but have since discovered what may be a very simple solution to the problem of "the relay cuts on and off rapidly until I turn down ...
Fabio Barone's user avatar
  • 4,254
1 vote

Relay Switching On and Off Rapidly During High Current Draw

Do I need to add a battery or a capacitor somewhere to ensure the relay has enough power to stay on or remain off when there isn't enough power overall? Is there a way to reserve enough current to ...
Fabio Barone's user avatar
  • 4,254
0 votes

Charge EV from array of small solar panels DC/AC

Electric vehicles don't support low voltage DC charging because there is little demand for it. The standard is either household AC, or high voltage and high current DC. The simplest option would be ...
Simon B's user avatar
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0 votes

Charge EV from array of small solar panels DC/AC

If Note that it doesn't matter for me that the charging time might be very long. then it doesn't really matter too much how efficient it is. The choice of going through AC or DC additional equipment ...
Neil_UK's user avatar
  • 168k

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