1
\$\begingroup\$

I am making a solar charger for 3 AA batteries. I have two 6 volt 100mah solar panels. Will it be more beneficial to connect them in parallel to have more current or in series to increase the voltage? The voltage of the 3 AAs will be at least 3.6 so I am wondering if there will be enough potential difference to charge them. I am aware that this charger will be slow and I will make sure that the batteries do not overcharge. They will probably be 1300mah 1.2 volt rechargeables. This is the solar panel: http://www.ebay.com/itm/301018398863?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

\$\endgroup\$
  • \$\begingroup\$ I recommend using a solar panel based charger, as they account for variation in light to the panels vs. the charge current and voltage needed. A direct connection can overcharge the batteries and standard charger IC's do not account for a wide range of voltage inputs such as a solar cell array. \$\endgroup\$ – Sparky256 May 26 '16 at 0:17
  • \$\begingroup\$ I plan on watching over the charging process and making sure that the batteries do not overcharge. Many instructables do it this way. I hope it works \$\endgroup\$ – Nick Solonko May 26 '16 at 1:22
1
\$\begingroup\$

(In this case) you're better off putting them in parallel - your batteries will not rise to 12V.

With the solar panels in series you will also have other issues. Imagine that one of the panels does not receive sunlight - it would generate a low current and the other panel would generate a high current - I do not think that the low current panel will be happy with the high current of the other one.

\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.