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electrical:solar:synopsis_puzzle2 [2017/07/31 17:06] frater_secessus [Synopsis: HandyBob's RV Battery Charging Puzzle 2] |
electrical:solar:synopsis_puzzle2 [2018/02/10 14:11] frater_secessus [Synopsis: HandyBob's RV Battery Charging Puzzle] |
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+ | This page aims to distill the knowledge contained in HandyBob' | ||
+ | Particularly useful and pithy statements are quoted directly under fair use. | ||
- | This page aims to distill the knowledge contained in HandyBob' | ||
- | |||
- | Particularly useful and pithy statements are quoted directly. | ||
====== Synopsis: HandyBob' | ====== Synopsis: HandyBob' | ||
+ | [Note from Secessus: | ||
HandyBob and his wife are fulltimers in a 5th wheel and have no generator. | HandyBob and his wife are fulltimers in a 5th wheel and have no generator. | ||
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===== converters ===== | ===== converters ===== | ||
- | Most OEM [[electrical: | + | Most OEM [[electrical: |
+ | |||
+ | ===== generators ===== | ||
+ | |||
+ | A generator with DC battery charging output is better than running the converter or auto charger on 110v. | ||
+ | |||
+ | |||
+ | ===== solar ===== | ||
+ | |||
+ | Bob runs his RV off 345W of panel and 450AH of 6v deep cycle batteries. | ||
+ | |||
+ | > " | ||
+ | |||
+ | When seeking advice: | ||
+ | > " | ||
+ | |||
+ | |||
+ | " | ||
+ | |||
+ | |||
+ | ===== charge controllers ===== | ||
+ | |||
+ | Get an oversized | ||
+ | |||
+ | Bob prefers Morningstar. | ||
+ | |||
+ | ===== MPPT boost controllers ===== | ||
+ | |||
+ | They work but the gains are found in specific scenarios like deeply discharged batteries. | ||
+ | |||
+ | |||
+ | ===== wiring ===== | ||
+ | |||
+ | "Big wire" is cheaper than panels for a similar gain in power. | ||
+ | |||
+ | Wiring from panels to controller is important; | ||
+ | |||
+ | Use stranded wire, the type (building, automotive, welding) is less important. | ||
+ | |||
+ | > "big wire is there to limit voltage drop, not to carry amps." -- HandyBob | ||
+ | |||
+ | |||
+ | ===== inverters ===== | ||
+ | |||
+ | Use a properly sized [[electrical: | ||
+ | |||
+ | MSW is fine unless you know you have something that needs PSW: " | ||
+ | |||
+ | "Soft start" inverters work work well. | ||
+ | |||
+ | Many inverters have a high voltage disconnect (Vhvd) of 15v. Temperature compensated charge controllers can hit 15v easily. | ||
+ | |||
+ | ===== installation considerations ===== | ||
+ | |||
+ | Install the charge controller near the batteries. | ||
+ | |||
+ | Locate solar panels so they are not shaded. | ||
+ | |||
+ | ===== fusing ===== | ||
+ | |||
+ | Bob prefers fuses to automotive-style circuit breakers. | ||
+ | Avoid fuse holders with springs in them. | ||
+ | Fuse every positive wire within a few inches of the battery. | ||